I purchased a 15 HP Johnson in 1982 in Manaus Brazil to use in upper reaches of Amazon tributaries. It was a factory modified motor based on the 10 (9.9)HP motor with the stouter lower unit from the 25hp model. It had a heavy duty low pitch propeller. The advantage was that it was light weight enough to haul it up some of those 50 ft high river banks. We mounted it in a 21ft aluminum boat and travelled 10 days for our first trip to an Indian village. We put on several thousand miles of travel with that boat and motor before it was stolen. But it was a good reliable motor - not fast, but it pushed a load of 1100 kilos easily. We often had to jump over logs, and under logs to get upstream. Thanks for bringing back a fond memory!
Thank you very much for your video. I just purchased two 9.9 Johnsons (a 1975 and a 1976), and with the help of your videos I'll have no problems tearing them down and making them as new as possible! Thanks again, stay safe. Watching part 2 right away!
A 9.9 to a 15hp. One of Johnson's little secrets to keeping their product line up. My Dad worked at the Waukegan plant for 33 years. He told me this secret years ago.
Walter here, on my wives page. I just found your page and will now be a regular viewer. I like and appreciate what you are doing. This kind of help is something I believe we can all gain from. Thank you for it. I recently picked up an identical 9.9 and thankfully it runs like a top! I'll soon be playing with an 85 horse and will be using info I gain here to help me.
Mike I was a master tech on OMC AND Johnson/ Evinrude outboards back in the 70s thru the late 90s. You are correct on the conversion from 9.9 to 15 hp. I you check the parts manual for your model year you will find that there is a shim that is fitted under the reed plate that will allow the reeds to open a bit further which in turn allows for the extra fuel. Also the difference in carburetors is the size of the venturi.
Hi Michael.......greetings from Australia. Just inherited a 9.9 Johnson and knew nothing about it until now. Many thanks for sharing your knowledge and indeed your friendly presentation. I am confident I will now be able to repair and use it as an Auxiliary motor for my boat.
Just now seeing this video. My man is giving really good info. Helped me a lot to figure out an old motor. I like knowing what I am working on before working on it and seeing others break it down helps. Thanks for the video!
Stephen C Foster park near me has a 10 horse limit on boat motors so everybody used to buy 15 horse and order a 9.9 cover to conceal their deception. The Rangers wouldn't look too hard back then if you weren't causing trouble. The first 2 digits of the vin plate is usually either 9.8, 9.9, 10 or 15, and you can change the 15 to 9.8 if you're careful and smudge the whole plate a little. Just a little outlaw fun from back in the day.
Thanks for these videos. I bought a little skiff a few years ago that has a 15hp Evinrude, of the same vintage as yours. I believe they are the same engine, just blue instead of white. Your videos will help me in getting it running again. Thanks again.
I think if you look around Canada you will find thousands of that year or model in Evinrude and Johnson outboards. They seem to be a bullet proof little motor! I enjoyed your presentation! Hello from Canada! Please stay safe!
Why do I watch this? 😆 Nice channel. Now I have another subscription to go along with the guy who digs junkyards for cars to fix and the bus grease guys😃. It is all so interesting.
Just so you know, I didn’t think you were “long winded”. You made sure we in the audience understood where you were and where you’re headed. I have a 1990 Johnson 8hp. I o all my own work as well. Thanks. Headed to Part II .
That water tube grommet that you said doesn't look right is just a different style that was used on those outboards especially, to make it easier to get the copper tube guided into the grommet...it is a wide mouth grommet and will work on most any Johnson Evinrude. I use them when I can...they help prevent the grommet from folding over and obstructing flow as it is nearly impossible to see if you have the tube IN the grommet when sliding the unit up into place on some motors. Great, no nonsense, helpful video for folks doing this for the first time.
I have a 9.9 evinrude outboard ,I found out that pulling the flywheel makes it easier to remove and replace thw pull starter , I like your vidoes thank you keep up thegreat work .
@@Michaelsbackyardmarina you are welcome , I would like to know where you are located please . I have miht have 2 outboards I would like to possibly trade for one good prefer at least 20 hp
Always agree, when you purchase something used, check and change oil, plugs.fluids, filters, etc so you have a starting point of your own for future maintenance.
I just bought my first boat, a 14 foot that came with a free 1994 9.9 Evinrude 2stroke. Guy said it had very very low hours but didn’t run. I had to fix a couple wires that were chewed from mice. The air box was packed with acorns, and the carburetor was thoroughly cooped up. I took it all apart, cleaned the carburetor,got the Jets passing air, put it all back together and it fired up on the first pull, purrs like a kitten. My one concern, it seems to not squirt the fresh water at idle but does very well when throttled up slightly🤨 I hope it’s not a problem. I’ve only ran the motor 2 times for a few minutes so far, haven’t taken it out yet. Your video would’ve help me a lot if I saw it before I did all the work 😂
Mike I really enjoyed the video of you working on this motor I sent you another request of information and I hope you answer but thanks for being online I will continue watching thank you
Getting dad's old 9.9 Johnson and '57 Johnson 7 1/2 he bought new like the 10hp. Mine is a 1980 maybe. I subscribed and probably will contact you when they arrive. Had them shipped from Maryland to CA. Arrives tomorrow or Tuesday hopefully. May do your upgrade to make it a 15hp. Many thanks for your video. Steve
Back in the 80's I bought a used 15hp Evinrude and replaced the decals with 9.9 decals so I could run it on our local "below 10hp" lakes. The serial plate on the mounting bracket still said 15hp but i was never checked by the game warden......I just never opened it all the way....LOLGreat little motors.
Same Block...parts are interchangeable...I put these on more sailboats than I can remember...lol....I took a 9.9 all over the South Pacific...Half a pull and my motors start and go..Damn good motor and easy to maintain...Dont let anybody tell you different.
Hi. As long as I can remember the 9.9 Hp and the 15 Hp were the same engines with the 15 just boosted (sorry I was early). In my book at first look this 88 is still a beauty .Being that old the main problem will be the rubber parts craking. These were the last years of the best quality engines and Envinrude-Jonhson ruled the water for their no nonesense Chevy style. Good luck
When grewing up one of my neighbors at the cottage had a 9.9 hp, but in fact was a 15 hp with 9.9 badging. They are exactly the same size. He won the 10 hp and under catagory at our local Regata for years and has a shelf full of trophies to boot.
I have owned a 1982 15 hp Johnson for 20 years...the 9.9 and 15 hp motors were exactly the same. All parts were I nterchangeable.The only difference between the two motors was the jetting in the carbs and the timing.The 15 ran at a little higher rpm
We had an Evinrude dealership in the 80's. (Roshway Sales and Service, Dryden Ontario). Same parts book and service manuals for the 9.9 & 15. I don't remember the parts book listing different carbs, but I do remember it listing different cylinder heads. (And I suddenly remember I'm gawd awful old)
I've got a 91 9.9 electric start long shaft, thing runs great.. matches my 1990 60hp tiller. The value of these old 9.9hp motors are up, pd $300 for mine.. will easily sell for double
Happy I found your video, I think it confirmed what I was suspecting about my 60hp of the same generation (1993). I had noticed the owners manual shows the 60hp and 70hp have the same displacement and I thought it must be pretty easy to convert the 60 to 70 if the block was the same. I wonder if anyone has done the conversion for that motor and if its the same parts to change (carburetor and reed plate spacers).
How's she goin'? Just found your channel and subbed!!! I had a Evinrude 9.9, almost the same as this one. Around the same year too. I had heard that a 9.9 could be made into a 15 with a different carb. Great tip on changing from short to long shaft though!! Looking forward to watching more of your channel!! On my channel I do a little of everything and I have a 14 foot Princecraft with a 20 Evinrude. I have plans to make the boat a center console and have the Evinrude tuned up. So I will be watching your channel for some tips and ideas!!! Take care!!
When you pulled the carburetor you said the screw on the cam follower was for 'idle' adjustment which is wrong. It is for "synchronizing" how far advanced the timing is when the butterfly in the carb begins to open. The idle adjustment stop should be on the outside of the motor by the throttle tower/back end of tiller mount area.
@@Michaelsbackyardmarina Yeah, but people as recently as half that have replied and who knows how many have not, but have trusted your 'mistake'? Perhaps, if possible, to pin this reply string as an addendum instead?
Mike I have a 69 Johnson 20 HP Johnson that I recently bought. It is very clean and runs like a champ in a barrel. When I put it on my boat and put it under load it kept jumping out of gear. I can't find anyone to look at it. Any ideas on what that could be. I don't feel comfortable just jumping in and trying to diagnose it, but If I had an idea of what it likely is that could give me a starting point and I kind of knew what I am getting into, I might take the plunge. Thanks, Paul
Just a heads up, when you were discussing where to measure from mounting on the boat, you referenced the wrong plate for being even with the bottom of the hull. The cavitation plate directly above the prop shaft is the plate to be even with the bottom of the boat.
Thanks for your video. My 13yo son just bought a 1977 Johnson 15HP. It has low compression in both cylinders (65 PSI) and no spark. We are pulling it apart and trying to get it going. Tested with a voltmeter and found good charge to power pack and nothing beyond. So ordering a new powerpack. Next we took the head off - the head gasket looked OK but we found the thermostat was rusted. Piston rings look OK too. So not sure why compressions is so low in both cylinders. Anyway - really enjoyed your video thanks.
I have a 9.9 Johnson 1984. I purchased this motor brand new and as such have had it it's entire life. Believe me go back to the Champion plugs. Mine still runs as good as new.
In Washington state - where I am , there is a " 10 hp " limit on lakes , some people got decals or a 9.9 hood....on their 15s.... I bought a 1990 Evinrude 15 short shaft brand new.... I paid $1399.00 for it.... those were awesome motors.....The throttle cable broke on mine when it only had a couple hundred hours.... of course the previous years had a gear to gear throttle system.... I loved those motors though.... that 15hp rapped out to 7000 rpm.... and it woul d run that speed nonstop for as long as you wanted....
@@Michaelsbackyardmarina I recall mine cost just under $30.00 ... in mid 1991.... I probably had 200 hours on the motor at that point...in salt water / Puget Sound .... It was a bit of a chore putting it i n... the idle adjustment is part of the whole thing and was finicky the first time through....
Just subscribed from the UK. Really like your easy presenting style, and very interesting to follow. I want to find another one of these outboards and get it in the water.
An excellent video. I have to disagree with your opinion about paddles, but that’s just me. I am definitely subscribing and I cannot wait for part two of this motor job. Thank you very much! David, South Carolina
Ove Your little shop and Love Outboards , We use to run an 9.9hp evinrude in my youth and at that time there was a laws that you needed i liscence for run over 10hp so i eard that they actualy turned 15hp to 9.9 by caurburators exchange so the Manufacturers would have a better market.
My impeller would not slide off either. The shaft was caked with old grease that had hardened. Had to use a brash brush and carb cleaner to get it off.
That’s really awesome!!! Maybe this year I have two Johnson’s I will be working on...my first experiences with boat motors. I had no idea about the change from long to short shaft.
I can't find part two to make a comment. I wasn't going to subscribe to you just because I subscribe to so many already, but darned if you aren't such an easy guy to listen to and you know your stuff. The other thing I like about old motors is the smell of 2 stroke mixed fuel exhaust. It brings back so many memories of past trips Oh! I found part two on my television just not on my phone.
A 9.9 is a 9.9 because some lakes and operator ages are limited to "below 10 hp." Often a 15 has the 9.9 cover on it. And yes, a 9.9 and a 15 are usually identical engines as you explained. That is a nice little outboard.
True... Most of the 9.9's I know of are a 15hp with a smaller carburetor to restrict the power down to 9.9... Oldest trick in the book is to get a 15 carb off one with a junked bottom end.
Good day, a correction should be made about proper mounting height of the outboard. The anti-ventilation plate {the wider wing on each side of the gearcase}, should end up between flush with the center bottom of the hull and up to 1.5" inches below it. If it is mounted any lower it will act like a hook and create drag, or if mounted higher the prop will over ventilate and you may end up with less water being sucked up by the water pump. This rule may be different with boats set up for racing, but they also different or modified parts to achieve the desired result.
i have a johnson 9.9 engine short shaft, the last pull on the recoil rope on the lake recently resulted in the rope no longer recoiling, Luckily the boat engine started and i got it off the lake. Despite that i like the johnson engine.
Hey brother, I just recently got a 1985 9.9 Johnson outboard short shaft motor and I think the thermostat is stuck closed cause it’s not spitting water like it supposed to and it gets hot really quickly, so I shut it down. I’m not sure if it’s the thermostat or the water pump. After this video I will be taking the lower unit apart and checking the water pump. Any input or ideas would be greatly appreciated, thanks Nathan
Hi, i bought a similar johnson that had been unused for couple of years, it won´t start changed the sparkplugs gasoline is coming, can you hint what i should check
On these motors under power head there is a rubber grommet on copper water pipe from water pump. Many swell closed in salt water. Motors would overheat. Clean around grommet and put anti corrosion grease on aluminium. Did dozens at dealership 7.5-15 same motors. Good motors
HI, my Friend, very good video. I have a similar motor a Jhonson 7,5hp 1980. I have overheated it; therefore, I have changed the water pump and Head cylinder gasket; however, I could not improve compression (50PSI). DO you think that would be hard to change rings? do I need a cylinder rectification? Made sense all this job?
I am in uncharted territory with a 1982 Johnson 15. The shaft is broken just below the upper spline. Do I have to pull the powerhead, or can I remove the midsection to get to it? I have never done either so pardon my ignorance.
From a marine technician to you having worked in the industry for 26 years 10 of them for an OMC dealer there’s no way that’s not the original impeller and whatever parts they gave this aren’t from this motor. impeller wasn’t melted but the rubber was laid over like it been that way forever ,and the keyway was stuck.
@@Michaelsbackyardmarina You’re welcome good work and good channel if you’re ever interested I have lots of marine parts .I started out working for an old timer who is now 89 and he specializes in old motors that large dealerships wouldn’t work on he taunted us to repair things not change parts . He was a stickler for no come backs PS I have subscribed to the channel 👍
with respect, the cavitation plate on the lower unit is the LOWEST plate, not the plate where they bolt together. That is where the engine runs when on plane friend.
You can fix that horrible crack in your floor very easily - get a roll of foam backer rod that will fit and some self-leveling caulk at your local masonry or big box lumber yard. Push the foam into the crack - can use a couple of rows on bigger cracks - and then fill with self-leveling caulk. It will sometime form a big bubble but just pop it when it does and it will level itself out. This is what we do in commercial construction jobs when we have this problem. If you want a concrete finish, then use self-leveling concrete. You can use it instead of the caulk or over the top of the caulk by leaving it down a little bit below the service, a half-inch should do.
I don,t know if you saw my comment before - But those engine,s have a problem with the water tube grommet at the power head it petrude,s up into the block and closes off the water flow after the motor warms up and starts blowing steam. It needs to be replaced. I am a marine mechanic who originally discovered the problem it shows in salt water sooner. There is a service bulletin about the problem.
In our region ,we have hp restrictions on many lakes, often 9.9 or under.. so .. cowl off of 9.9 on 15hp usuually works ok ..unless the Conservation officer checks the motor tag..
Good video, very helpful and informative on John 9.9 Hp engines. Just one thing you are incorrect in where you are measuring the length of the shaft. The measurement starts from the cavitation plate directly above the propellor, from what I see you are measuring from the lower fin above the cavitation plate. Using your measurement will put the caviation plate about 3-4'' below the bottom of the boat and affect the planing characteristics & steering of the boat. The cavitiation plate should ideally be flush with the bottom of the boat but no more than a 1/2" variation up or down.
I purchased a 15 HP Johnson in 1982 in Manaus Brazil to use in upper reaches of Amazon tributaries. It was a factory modified motor based on the 10 (9.9)HP motor with the stouter lower unit from the 25hp model. It had a heavy duty low pitch propeller. The advantage was that it was light weight enough to haul it up some of those 50 ft high river banks. We mounted it in a 21ft aluminum boat and travelled 10 days for our first trip to an Indian village. We put on several thousand miles of travel with that boat and motor before it was stolen. But it was a good reliable motor - not fast, but it pushed a load of 1100 kilos easily. We often had to jump over logs, and under logs to get upstream. Thanks for bringing back a fond memory!
We need more boat mechanics that care about their work like you do. Thx for that! 💯👍🏼
I appreciate the kind words, thank you for watching
Thank you very much for your video. I just purchased two 9.9 Johnsons (a 1975 and a 1976), and with the help of your videos I'll have no problems tearing them down and making them as new as possible! Thanks again, stay safe. Watching part 2 right away!
glad the videos helped. Thanks for watching and commenting
A 9.9 to a 15hp. One of Johnson's little secrets to keeping their product line up. My Dad worked at the Waukegan plant for 33 years. He told me this secret years ago.
I like watching you better than anyone else working on low ride Johnson 15hp . Thank you so much
Much appreciated Joe, thanks for watching
Oh! I'm so glad the algorithm suggested this. I'm about to buy my buddy's old 1960s 14' fiberglass boat with a Johnson 9.9 on the back.
Do it for sure. Thanks for watching
Walter here, on my wives page. I just found your page and will now be a regular viewer. I like and appreciate what you are doing. This kind of help is something I believe we can all gain from. Thank you for it. I recently picked up an identical 9.9 and thankfully it runs like a top! I'll soon be playing with an 85 horse and will be using info I gain here to help me.
Welcome aboard!
Great info-Im working on my 9.9 1980 original owner was Dad. Been sitting for 8 years--
Mike
I was a master tech on OMC AND Johnson/ Evinrude outboards back in the 70s thru the late 90s. You are correct on the conversion from 9.9 to 15 hp. I you check the parts manual for your model year you will find that there is a shim that is fitted under the reed plate that will allow the reeds to open a bit further which in turn allows for the extra fuel. Also the difference in carburetors is the size of the venturi.
Absolutely correct. So many folks want to argue about it, it crazy. Thanks for helping me set the record straight with some folks.
Hi Michael.......greetings from Australia. Just inherited a 9.9 Johnson and knew nothing about it until now. Many thanks for sharing your knowledge and indeed your friendly presentation. I am confident I will now be able to repair and use it as an Auxiliary motor for my boat.
Great to hear!
Just now seeing this video. My man is giving really good info. Helped me a lot to figure out an old motor. I like knowing what I am working on before working on it and seeing others break it down helps. Thanks for the video!
Glad to help
Stephen C Foster park near me has a 10 horse limit on boat motors so everybody used to buy 15 horse and order a 9.9 cover to conceal their deception. The Rangers wouldn't look too hard back then if you weren't causing trouble. The first 2 digits of the vin plate is usually either 9.8, 9.9, 10 or 15, and you can change the 15 to 9.8 if you're careful and smudge the whole plate a little. Just a little outlaw fun from back in the day.
I should've read more comments lol
Mines the opposite its a 9.9 with a 15 horse cover.
@@ExploringCabinsandMines Well sir That is call getting ripped off lol
@@nickalasd.1091 Well sir I got it for free soooo .....not.
The Florida pool pump motor bearing repair guy When Service Calls Longwood approved ! that was good info RMD
Right on
Thanks for these videos. I bought a little skiff a few years ago that has a 15hp Evinrude, of the same vintage as yours. I believe they are the same engine, just blue instead of white. Your videos will help me in getting it running again. Thanks again.
I think if you look around Canada you will find thousands of that year or model in Evinrude and Johnson outboards. They seem to be a bullet proof little motor!
I enjoyed your presentation! Hello from Canada! Please stay safe!
Your right I,ve owned two the only reason I bought a second one is because someone stole my first one ( I am from ontariariario)
Our family have bought 10 9.9’s from 1974 and they all still run today
Why do I watch this? 😆 Nice channel. Now I have another subscription to go along with the guy who digs junkyards for cars to fix and the bus grease guys😃. It is all so interesting.
Just so you know, I didn’t think you were “long winded”. You made sure we in the audience understood where you were and where you’re headed. I have a 1990 Johnson 8hp. I o all my own work as well. Thanks. Headed to Part II .
Cool, thank you for watching.
I've got a 25 short shaft you taught me things i didn't know thanks😊
Very informative..I really like the info on the difference between a 9.9 and 15.. thinking I'm gonna build me a sleeper for the water
Go for it!
That water tube grommet that you said doesn't look right is just a different style that was used on those outboards especially, to make it easier to get the copper tube guided into the grommet...it is a wide mouth grommet and will work on most any Johnson Evinrude. I use them when I can...they help prevent the grommet from folding over and obstructing flow as it is nearly impossible to see if you have the tube IN the grommet when sliding the unit up into place on some motors. Great, no nonsense, helpful video for folks doing this for the first time.
I have a 9.9 evinrude outboard ,I found out that pulling the flywheel makes it easier to remove and replace thw pull starter , I like your vidoes thank you keep up thegreat work .
Thanks for the info, thank you for watching and commenting.
@@Michaelsbackyardmarina you are welcome , I would like to know where you are located please . I have miht have 2 outboards I would like to possibly trade for one good prefer at least 20 hp
@@edwardnorlander6212 I'm in eastern Iowa. What two outboards are you talking about trading in?
Always agree, when you purchase something used, check and change oil, plugs.fluids, filters, etc so you have a starting point of your own for future maintenance.
Absolutely. Thanks for watching and commenting
Very interesting video. I will enjoy all of your future presentations.
Glad to hear that!
I just bought my first boat, a 14 foot that came with a free 1994 9.9 Evinrude 2stroke. Guy said it had very very low hours but didn’t run. I had to fix a couple wires that were chewed from mice. The air box was packed with acorns, and the carburetor was thoroughly cooped up. I took it all apart, cleaned the carburetor,got the Jets passing air, put it all back together and it fired up on the first pull, purrs like a kitten.
My one concern, it seems to not squirt the fresh water at idle but does very well when throttled up slightly🤨 I hope it’s not a problem. I’ve only ran the motor 2 times for a few minutes so far, haven’t taken it out yet.
Your video would’ve help me a lot if I saw it before I did all the work 😂
Mike I really enjoyed the video of you working on this motor I sent you another request of information and I hope you answer but thanks for being online I will continue watching thank you
Thanks for watching. Much appreciated
Getting dad's old 9.9 Johnson and '57 Johnson 7 1/2 he bought new like the 10hp. Mine is a 1980 maybe. I subscribed and probably will contact you when they arrive. Had them shipped from Maryland to CA. Arrives tomorrow or Tuesday hopefully. May do your upgrade to make it a 15hp. Many thanks for your video. Steve
send me an email of them running when you get them done
As a Master mech for Jonson I will say that you do a very good job and your Information is also very good.
Thank you.
Back in the 80's I bought a used 15hp Evinrude and replaced the decals with 9.9 decals so I could run it on our local "below 10hp" lakes. The serial plate on the mounting bracket still said 15hp but i was never checked by the game warden......I just never opened it all the way....LOLGreat little motors.
I agree you got to play smart.
Good one!
I'm learning a lot from you ,thanks for all videos
I have always wanted a 9.9 Johnson!!
37:03 solid gem 💎 👌 thanks for making an informative and inspirational video!
Glad you enjoyed it!
Same Block...parts are interchangeable...I put these on more sailboats than I can remember...lol....I took a 9.9 all over the South Pacific...Half a pull and my motors start and go..Damn good motor and easy to maintain...Dont let anybody tell you different.
Hi. As long as I can remember the 9.9 Hp and the 15 Hp were the same engines with the 15 just boosted (sorry I was early).
In my book at first look this 88 is still a beauty .Being that old the main problem will be the rubber parts craking.
These were the last years of the best quality engines and Envinrude-Jonhson ruled the water for their no nonesense Chevy style.
Good luck
Thank you Mike really enjoyed it and learned a lot
When grewing up one of my neighbors at the cottage had a 9.9 hp, but in fact was a 15 hp with 9.9 badging. They are exactly the same size. He won the 10 hp and under catagory at our local Regata for years and has a shelf full of trophies to boot.
I have owned a 1982 15 hp Johnson for 20 years...the 9.9 and 15 hp motors were exactly the same. All parts were I
nterchangeable.The only difference between the two motors was the jetting in the carbs and the timing.The 15 ran at a little higher rpm
Cheating must have made him so proud of himself
@@fishhuntadventure for real! What a jerk
Best video instruction out there... well done and I just suscribed. Knowledge tips are excellent too.
Awesome, thank you!
Like the explanation very complete even someone like me most experience is with a paddle can understand what you are doing
A lot of good information here Thanks for sharing!
Glad it was helpful!
@14:10-> shaft should measure from anti ventilation plate, which is nearest to up from prop.
you are correct.
I have a 1986 Johnson 6 hp with the original spark plugs. I have used it every year all summer.
Great job brother 👏
Hid the 15hp on a 9.9 only lake! Great find!! Probably on a posture boat...
I also had a 15hp model and it was one of the best motors I ever owned..sold it when I sold the boat
They are reliable for sure.
you know this is a great video about outboards
Enjoyed the video and found it very helpful.
Glad to hear it!
Good too figure that out . Why won't it re-up unless it's in gear ? In the barrel of water?
It had a limiter to keep you from over revving the engine
There awsome motors I had one and it always started right up 2 pull after sat all winter
they are reliable, thanks for watching
9.9 is an above average Johnson. Im restoring an old 1958 Evinrude 18hp. This video was a huge help! Thanks M8!
We had an Evinrude dealership in the 80's. (Roshway Sales and Service, Dryden Ontario). Same parts book and service manuals for the 9.9 & 15. I don't remember the parts book listing different carbs, but I do remember it listing different cylinder heads. (And I suddenly remember I'm gawd awful old)
Thanks for making this. Now feel like I could open one of these up and work on it myself.
I learned a few things watching this video. Thank you.
Glad to hear it! Thank you for watching
I've got a 91 9.9 electric start long shaft, thing runs great.. matches my 1990 60hp tiller.
The value of these old 9.9hp motors are up, pd $300 for mine.. will easily sell for double
It's because all the new stuff prices are driving up old stuff prices, thanks for watching
Happy I found your video, I think it confirmed what I was suspecting about my 60hp of the same generation (1993). I had noticed the owners manual shows the 60hp and 70hp have the same displacement and I thought it must be pretty easy to convert the 60 to 70 if the block was the same. I wonder if anyone has done the conversion for that motor and if its the same parts to change (carburetor and reed plate spacers).
How's she goin'? Just found your channel and subbed!!! I had a Evinrude 9.9, almost the same as this one. Around the same year too. I had heard that a 9.9 could be made into a 15 with a different carb. Great tip on changing from short to long shaft though!! Looking forward to watching more of your channel!! On my channel I do a little of everything and I have a 14 foot Princecraft with a 20 Evinrude. I have plans to make the boat a center console and have the Evinrude tuned up. So I will be watching your channel for some tips and ideas!!! Take care!!
@Alan Kropp Thanks for the tip!!!
When you pulled the carburetor you said the screw on the cam follower was for 'idle' adjustment which is wrong. It is for "synchronizing" how far advanced the timing is when the butterfly in the carb begins to open. The idle adjustment stop should be on the outside of the motor by the throttle tower/back end of tiller mount area.
You are correct, this video is over two years old much more has been learned since then, thanks for watching
@@Michaelsbackyardmarina Yeah, but people as recently as half that have replied and who knows how many have not, but have trusted your 'mistake'? Perhaps, if possible, to pin this reply string as an addendum instead?
Mike
I have a 69 Johnson 20 HP Johnson that I recently bought. It is very clean and runs like a champ in a barrel. When I put it on my boat and put it under load it kept jumping out of gear. I can't find anyone to look at it. Any ideas on what that could be. I don't feel comfortable just jumping in and trying to diagnose it, but If I had an idea of what it likely is that could give me a starting point and I kind of knew what I am getting into, I might take the plunge.
Thanks,
Paul
Great video!
thanks for watching
Just a heads up, when you were discussing where to measure from mounting on the boat, you referenced the wrong plate for being even with the bottom of the hull. The cavitation plate directly above the prop shaft is the plate to be even with the bottom of the boat.
Yeppers, you are correct.
Thanks for your video.
My 13yo son just bought a 1977 Johnson 15HP. It has low compression in both cylinders (65 PSI) and no spark. We are pulling it apart and trying to get it going.
Tested with a voltmeter and found good charge to power pack and nothing beyond. So ordering a new powerpack.
Next we took the head off - the head gasket looked OK but we found the thermostat was rusted. Piston rings look OK too. So not sure why compressions is so low in both cylinders.
Anyway - really enjoyed your video thanks.
I have a 9.9 Johnson 1984. I purchased this motor brand new and as such have had it it's entire life. Believe me go back to the Champion plugs. Mine still runs as good as new.
I have a 97 suzuki 9.9 with the 15hp setup on a 12' fiberglass johnboat popular mod around here .🇨🇦✌
Very nice.
Nice job that cleaned up nicely 👍
Mike could you do a video of a Justin top idle screw inside on the carburetor and also the outside in front and also the side adjustment on the motor
I will be doing a video of putting it back together.
In Washington state - where I am , there is a " 10 hp " limit on lakes , some people got decals or a 9.9 hood....on their 15s.... I bought a 1990 Evinrude 15 short shaft brand new.... I paid $1399.00 for it.... those were awesome motors.....The throttle cable broke on mine when it only had a couple hundred hours.... of course the previous years had a gear to gear throttle system.... I loved those motors though.... that 15hp rapped out to 7000 rpm.... and it woul
d run that speed nonstop for as long as you wanted....
I have one I just picked up that has a broke throttle cable. They are about $88 each
@@Michaelsbackyardmarina I recall mine cost just under $30.00 ... in mid 1991.... I probably had 200 hours on the motor at that point...in salt water / Puget Sound .... It was a bit of a chore putting it i n... the idle adjustment is part of the whole thing and was finicky the first time through....
Just subscribed from the UK. Really like your easy presenting style, and very interesting to follow. I want to find another one of these outboards and get it in the water.
Welcome aboard!
I have a 1981 35 horse still mounted on the boat it was sold on new and it goes like a rocket!~
Excellent video
An excellent video. I have to disagree with your opinion about paddles, but that’s just me. I am definitely subscribing and I cannot wait for part two of this motor job.
Thank you very much!
David, South Carolina
Ove Your little shop and Love Outboards
, We use to run an 9.9hp evinrude in my youth and at that time there was a laws that you needed i liscence for run over 10hp so i eard that they actualy turned 15hp to 9.9 by caurburators exchange so the Manufacturers would have a better market.
Interesting, thanks for watching
My impeller would not slide off either. The shaft was caked with old grease that had hardened. Had to use a brash brush and carb cleaner to get it off.
Knowledge Drop: 9.9 & 15hp OMC engine cowls are interchangeable as well
That’s really awesome!!! Maybe this year I have two Johnson’s I will be working on...my first experiences with boat motors. I had no idea about the change from long to short shaft.
You can do it!
I can't find part two to make a comment. I wasn't going to subscribe to you just because I subscribe to so many already, but darned if you aren't such an easy guy to listen to and you know your stuff. The other thing I like about old motors is the smell of 2 stroke mixed fuel exhaust. It brings back so many memories of past trips
Oh! I found part two on my television just not on my phone.
Hey thanks for watching. Glad you found part 2
A 9.9 is a 9.9 because some lakes and operator ages are limited to "below 10 hp." Often a 15 has the 9.9 cover on it. And yes, a 9.9 and a 15 are usually identical engines as you explained. That is a nice little outboard.
True... Most of the 9.9's I know of are a 15hp with a smaller carburetor to restrict the power down to 9.9... Oldest trick in the book is to get a 15 carb off one with a junked bottom end.
Good day, a correction should be made about proper mounting height of the outboard. The anti-ventilation plate {the wider wing on each side of the gearcase}, should end up between flush with the center bottom of the hull and up to 1.5" inches below it. If it is mounted any lower it will act like a hook and create drag, or if mounted higher the prop will over ventilate and you may end up with less water being sucked up by the water pump. This rule may be different with boats set up for racing, but they also different or modified parts to achieve the desired result.
Thanks for the tip. Been a whole bunch of folks commenting about my mis speaking about this. Thanks for watching
Nice video, I learned a lot. Thanks...
Glad it was helpful!
i have a johnson 9.9 engine short shaft, the last pull on the recoil rope on the lake recently resulted in the rope no longer recoiling, Luckily the boat engine started and i got it off the lake. Despite that i like the johnson engine.
I do like how they run
I have the same engine. Great outboards
Yes they are!
Wow great tip about spacer!!! Didn't know
How you change?? Dandahrrmit
Glad it helped, thanks for watching
What are the two controls on the front of the motor to the left of the pull cord and how are they used?
Do you have a flywheel nut a can’t find one anywhere. I watch your videos all the time. Thanks for what you do.
I don't have any spares. Do a google search and you will find plenty. Thanks for watching
Hey brother, I just recently got a 1985 9.9 Johnson outboard short shaft motor and I think the thermostat is stuck closed cause it’s not spitting water like it supposed to and it gets hot really quickly, so I shut it down. I’m not sure if it’s the thermostat or the water pump. After this video I will be taking the lower unit apart and checking the water pump. Any input or ideas would be greatly appreciated, thanks Nathan
How did the replacement of the water pump impellor go?
Up through the mid 90's a lot of local legislature made you register boats with engines 10hp and over. A 9.9 cover on a 15hp was an easy work around.
Hi, i bought a similar johnson that had been unused for couple of years, it won´t start changed the sparkplugs gasoline is coming, can you hint what i should check
please what exactly is the designation and tip of this engine?
That’s a fairly clean motor. I get some nasty ones lol
On these motors under power head there is a rubber grommet on copper water pipe from water pump.
Many swell closed in salt water.
Motors would overheat.
Clean around grommet and put anti corrosion grease on aluminium.
Did dozens at dealership
7.5-15 same motors.
Good motors
Hey mate can I pick your brain? I have a 15hp that I cant find anything about online. my model number is AJ15BACUD Cheers.
@@danzawraith8104 sure what's wrong?
So it’s ok to pull the shaft all they way out and get the impeller off and just put it back in,right.?
HI, my Friend, very good video. I have a similar motor a Jhonson 7,5hp 1980. I have overheated it; therefore, I have changed the water pump and Head cylinder gasket; however, I could not improve compression (50PSI). DO you think that would be hard to change rings? do I need a cylinder rectification? Made sense all this job?
sounds like you stuck the rings. You will have to split the case to do piston and rings for sure.
I am in uncharted territory with a 1982 Johnson 15. The shaft is broken just below the upper spline. Do I have to pull the powerhead, or can I remove the midsection to get to it? I have never done either so pardon my ignorance.
From a marine technician to you having worked in the industry for 26 years 10 of them for an OMC dealer there’s no way that’s not the original impeller and whatever parts they gave this aren’t from this motor. impeller wasn’t melted but the rubber was laid over like it been that way forever ,and the keyway was stuck.
Thanks for the info.
@@Michaelsbackyardmarina You’re welcome good work and good channel if you’re ever interested I have lots of marine parts .I started out working for an old timer who is now 89 and he specializes in old motors that large dealerships wouldn’t work on he taunted us to repair things not change parts . He was a stickler for no come backs PS I have subscribed to the channel 👍
with respect, the cavitation plate on the lower unit is the LOWEST plate, not the plate where they bolt together. That is where the engine runs when on plane friend.
Hey sir I have the exact same engine but it won’t start I’ve tried a ton of things I was wondering if you could help me
Thanks
You can fix that horrible crack in your floor very easily - get a roll of foam backer rod that will fit and some self-leveling caulk at your local masonry or big box lumber yard. Push the foam into the crack - can use a couple of rows on bigger cracks - and then fill with self-leveling caulk. It will sometime form a big bubble but just pop it when it does and it will level itself out. This is what we do in commercial construction jobs when we have this problem. If you want a concrete finish, then use self-leveling concrete. You can use it instead of the caulk or over the top of the caulk by leaving it down a little bit below the service, a half-inch should do.
I was hoping to see how u got the shift linkage pin out.
Sorry, thanks for watching
Just bought a 2001 9.9 and can't figure out how to adjust the trim? Any help is appreciated.
I don,t know if you saw my comment before - But those engine,s have a problem with the water tube grommet at the power head it petrude,s up into the block and closes off the water flow after the motor warms up and starts blowing steam. It needs to be replaced. I am a marine mechanic who originally discovered the problem it shows in salt water sooner. There is a service bulletin about the problem.
Yes I did see your note. Thanks for watching and commenting
In our region ,we have hp restrictions on many lakes, often 9.9 or under.. so .. cowl off of 9.9 on 15hp usuually works ok ..unless the Conservation officer checks the motor tag..
That could certainly happen. Thanks for watching
Good video, very helpful and informative on John 9.9 Hp engines. Just one thing you are incorrect in where you are measuring the length of the shaft. The measurement starts from the cavitation plate directly above the propellor, from what I see you are measuring from the lower fin above the cavitation plate. Using your measurement will put the caviation plate about 3-4'' below the bottom of the boat and affect the planing characteristics & steering of the boat. The cavitiation plate should ideally be flush with the bottom of the boat but no more than a 1/2" variation up or down.
yep, thanks for watching. know all about the measurement, have a good holiday.
The older Evinrude & Johnson 9.9s had a restrictor plate at the carb mount that could be removed to make it a 15 H.P.
Understood
What years??