Everything you said about that set up is completely true....I've worked on a lot of outboards in my day, and yes 4 strokes are nice...but these older 2 strokes (especially Yamaha) are just dead reliable. I'll take reliability over noise, smoke, and MPG any day on my smaller boats....big boats, the 4s are definitely nice to have. I have a Yamaha 25 and 70, and both have been amazing. Cool video bro.
I'm learning to repair outboard motors at my Technical colledge, and recently picked up a 2003 yamaha 15hp 2 stroke. It has no spark so I did some tests and discovered that the CDI is bad. New one was ordered and hope to test it out soon. Thanks
Hi, really enjoy your channel. I have 2 of these motors and agree completely they are the best. My 2004 has a 100:1 sticker on it and that’s what I use. I recently saw the identical motor (2009)on Craigslist and the photos clearly show a 50:1 sticker?
If you adjust the butterfly flap which you pointed too and said to mark so you know where to set back to. Well if you adjust a tiny bit you can take a bit of slack out of it helping to open the flap an extra bit for a little bit more air. Just don’t go too far cause it will idle very high but there is a bit of slack in 99% of them motors have the exact same motor and setup, great video btw well explained 👌
@@TRICKEDTINS the 9.9 to 15 hp need reeds adjust , and 9.9 have on the throttle inside the outboard, where the cables meet on the round thing, have little limiter from stainless steel , 9.9 if you look at carb opening , on full throttle does not open full . If you search on google you will find pictures from a guy that did this . And he test 15 , next to 9.9 also need carb adjustment just a little. If yours is not fitted with the limiter , maybe someone else take it off. I have mine from new and was there
Importing and selling 2 strokes were banned in Europe in 2007 as well. The Yamaha Enduros are sold and manufactured only for Asian markets if I remember correctly.
Lol, no, sorry. That motor is maxed out without serious machine work. You want to go faster then buy a bigger motor. Yami 2stroke 40 weights the same at that 4 stroke 25
Would be more helpful if you had a 9.9hp reed cage for comparison. Ebay sells the same reed cage for both the 15 hp and the 9.9. How do you explain that ?
I've got a 2010 Yamaha 9.9 in excellent condition are there any horsepower upgrade options for this one? Any info would be appreciated for the T9.9GPLR or similar model from 2010. Thanks for any help. Cool video.
Fuel mix is based on the burn of the spark plug, not getting Fouled. If the book says 100:1 Mix and your running 50 parts Fuel to 1 part oil and plugs look good Burn clean, I like the idea as it Gets better internal lubrication.
Its not HP but torque in middrange that get boat over water pressure and make it go to plane. Cc capacity is important for boat engine to get him, and load over point of max pressure.. Older 2 strokes have much bigger cc engines then newer 4strokes.. And 2 strokes can be retuned to higher power just with 2 thing. . bigger intake&carb and bigger exhaust.. And off you go..
Hey! I have a 1994 Yamaha 9.9 I’m trying to convert to a 15. Do you know if I can just pop new 15 reeds or would I have to switch the carb too? This was a great video thanks
In addition, the 9.9 hp teddy bear has a smaller carburetor throat and the 15 hp carburetor has larger nozzles. At least I saw it in the European versions. There will be a little more power, but with the replacement of the carburettor it will increase properly. Many here also think that there is only a difference in the opening of the intake valves in these older models
Good stuff and thanks for sharing and juat some info in the off road MX world Boyesen sells replacement reeds and these stock reed stops are eliminated completely. If you have thick reeds the top end power will be better and if they are thin then the low end power delivery will be better and the top end will not be due to the thinner reeds will flutter. I know this is an outboard motor but typically the two stroke motor designs tend to follow similar processes. Just an FYI.
@tricked tins 1. Is there any other part that needs to be changed along with the Carb? 2. Does the carb swap stress out any other F9.9 4 Stroke component? 3. How's the long term performance after the swap, speed, mileage?
We didn't change the carb. Only the reeds. Night and day difference in speed. No additional stress because it's the only difference between the 9.9 and the 15hp. It's basically a true 15hp now instead of a restricted 15hp
A little confused here...I have a 1999 Yam short stroke and plan on the upgrade. I only need to replace the reeds and use the old carb ? Or do I buy a new carb with the 15 hp reeds ? Also, do you recommend me changing-out the impeller ?
All you need is 15hp reeds. Carbs are the same. Impeller has nothing to do with power that's for the waterpump and yes if you haven't changed it I recommend it.
I have a T9.9hp - 1994 4 Stroke, Electric Start Called a "High Thrust" The only Difference I Can Find is the Huge Size of the Propeller, looks almost out of place on the Motor? 11 3/4" Diameter X 9 1/4 Pitch R --- Right Hand
Well... I may soon be adding the Yamaha to my search for new-to-me motors! Thank you. Also, I have been looking HARD at just getting one of the new tohatsu 9.9 to convert to 20. I just looked through your video list over the last 11 months and didn't see it. Have you made that conversion video yet? (Can you point me in the right direction?) Thank You for all you do! ~ Marty M. (a local)
@@TRICKEDTINS Awesome! Just like the Suzuki then? With the Suzuki you replace the ECM, and remove the choke disc from the intake and replace with the OEM spark arrestor screen. Done.
@@TRICKEDTINS thank you for the quick response :-) Can i take those China reedvalves from ebay or do you recommend to take the original Yamaha reedvalves?
@@TRICKEDTINShi, I just bent mine to have 6mm gap, as seen in another blog. Problem is the prop spins really fast once I shift into gear. What do I need to adjust? And what do you mean by “it has to be spot on”?
Had one few years ago. Had to sell needed $. Tried to find another for lingest time a ither just fell in my lap. Gonna keep this one. My ya these motors are dirt simple The enduro models are wasted spark so both plugs fire at same.time. Keeps cost down and easier cheaper cdi unit. I love my 4 strokes and dont touch two anymore, except then 9.9/15 yamaha
Ha, that's funny. Honestly, I wasn't planning on doing this video. It was on a whim. Recorded and edited last night. Im ready to fish. This weekend isn't looking to good tho.
Everything you said about that set up is completely true....I've worked on a lot of outboards in my day, and yes 4 strokes are nice...but these older 2 strokes (especially Yamaha) are just dead reliable. I'll take reliability over noise, smoke, and MPG any day on my smaller boats....big boats, the 4s are definitely nice to have. I have a Yamaha 25 and 70, and both have been amazing. Cool video bro.
Thanks brotha!
I'm learning to repair outboard motors at my Technical colledge, and recently picked up a 2003 yamaha 15hp 2 stroke. It has no spark so I did some tests and discovered that the CDI is bad. New one was ordered and hope to test it out soon. Thanks
I have a 07 Yamaha 115 2 stroke that runs like new but i fo take very good care of it also
Nice motor
Just picked up one of these…
Any idea what the standard compression pressure reading when at its healthy peak should be?
90 - 105 is good
Good day boss
Actually I have a 9.9 engine and I don't know how much space is required to expand the reed valve
I'm not sure I understand. I'm assuming you want to try to bend your own reeds?
You can do that but i'm not sure what the specs should be. I would recommend just buying the fifteen horsepower reads and replacing it
@@TRICKEDTINS Excellent. Have you had any engine problems?
Just bend it to 6mm!!
I have a smaller boat so weight is my concern what is the weight of your motor? Thanks great info.
84lb
Hi, really enjoy your channel. I have 2 of these motors and agree completely they are the best. My 2004 has a 100:1 sticker on it and that’s what I use. I recently saw the identical motor (2009)on Craigslist and the photos clearly show a 50:1 sticker?
The old ones say 100-1 they changed it to 50-1 bc motors were blowing. Id run 50-1.
Dont you have to change the jets as well when you convert from 9.9 to 15hp?
Nope
If you adjust the butterfly flap which you pointed too and said to mark so you know where to set back to. Well if you adjust a tiny bit you can take a bit of slack out of it helping to open the flap an extra bit for a little bit more air. Just don’t go too far cause it will idle very high but there is a bit of slack in 99% of them motors have the exact same motor and setup, great video btw well explained 👌
Thanks brotha
Don’t forget after the reeds to unlock the limiter from the accelerator canker ist a stainless little bit
I have no idea what you talking about. Lol
@@TRICKEDTINS the 9.9 to 15 hp need reeds adjust , and 9.9 have on the throttle inside the outboard, where the cables meet on the round thing, have little limiter from stainless steel , 9.9 if you look at carb opening , on full throttle does not open full . If you search on google you will find pictures from a guy that did this . And he test 15 , next to 9.9 also need carb adjustment just a little. If yours is not fitted with the limiter , maybe someone else take it off. I have mine from new and was there
@@tynubernard Do you have some more info? I've also converted my 9.9 to 15hp, but on low rpm it does run a little bit shaky.
I think you mean the throttle stop
Importing and selling 2 strokes were banned in Europe in 2007 as well. The Yamaha Enduros are sold and manufactured only for Asian markets if I remember correctly.
I didnt know that. Thanks for sharing
Can you show me how to covert a 25 four stroke Yamaha so get more hp and speed
Lol, no, sorry. That motor is maxed out without serious machine work. You want to go faster then buy a bigger motor. Yami 2stroke 40 weights the same at that 4 stroke 25
Would be more helpful if you had a 9.9hp reed cage for comparison. Ebay sells the same reed cage for both the 15 hp and the 9.9. How do you explain that ?
The 9.9 is almost closed. The 15 is open its literally night and day difference.
I've got a 2010 Yamaha 9.9 in excellent condition are there any horsepower upgrade options for this one? Any info would be appreciated for the T9.9GPLR or similar model from 2010. Thanks for any help. Cool video.
Thank you, unfortunately. I don't think that motor is upgradable. They stopped making the two stroke motors in 2009
I have the exact same motor, Curious what fuel to oil mixture you are running? Yam recommends 100:1 but a lot of guys say to run 50:1??
I sold this motor the day adter this video dropped. I recommend 50/1 if you want it to last
Fuel mix is based on the burn of the spark plug, not getting Fouled.
If the book says 100:1
Mix and your running
50 parts Fuel to 1 part oil and plugs look good
Burn clean, I like the idea as it Gets better internal lubrication.
Its not HP but torque in middrange that get boat over water pressure and make it go to plane. Cc capacity is important for boat engine to get him, and load over point of max pressure.. Older 2 strokes have much bigger cc engines then newer 4strokes.. And 2 strokes can be retuned to higher power just with 2 thing. . bigger intake&carb and bigger exhaust.. And off you go..
Hey! I have a 1994 Yamaha 9.9 I’m trying to convert to a 15. Do you know if I can just pop new 15 reeds or would I have to switch the carb too? This was a great video thanks
Thanks brotha. Reeds is all you need man.
Thank you for responding, helps me a ton!
Just picked one up, so do I need to order 15 horsepower reeds? So basically 4 parts of the reeds
Its one part. 15hp reeds
In addition, the 9.9 hp teddy bear has a smaller carburetor throat and the 15 hp carburetor has larger nozzles. At least I saw it in the European versions. There will be a little more power, but with the replacement of the carburettor it will increase properly. Many here also think that there is only a difference in the opening of the intake valves in these older models
where do you get the part to replace? have a link?
www.ebay.com/itm/353868605968?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=hz0kde0qqda&sssrc=2349624&ssuid=xZ6HgZKcSHK&var=&widget_ver=artemis&media=COPY
Don't know anything about these things .... but dang sounds like a hellova deal!!! And yes -- 5hp is big power difference. Be Safe
Forsure! The 2 stroke yamis are very sought after motors!
Good stuff and thanks for sharing and juat some info in the off road MX world Boyesen sells replacement reeds and these stock reed stops are eliminated completely. If you have thick reeds the top end power will be better and if they are thin then the low end power delivery will be better and the top end will not be due to the thinner reeds will flutter. I know this is an outboard motor but typically the two stroke motor designs tend to follow similar processes. Just an FYI.
Good to know. Thanks for sharing
@tricked tins
1. Is there any other part that needs to be changed along with the Carb?
2. Does the carb swap stress out any other F9.9 4 Stroke component?
3. How's the long term performance after the swap, speed, mileage?
We didn't change the carb. Only the reeds. Night and day difference in speed. No additional stress because it's the only difference between the 9.9 and the 15hp. It's basically a true 15hp now instead of a restricted 15hp
I've got a 2014 4 stroke f9.9 jmh. Carb, and was looking to swap the carb. Could use your help.
You need a different motor
I have a 15 hp 4 stroke Yamaha, can it be upgraded to higher? I appreciate the video!
Nope
Did you ever do the video for the tohatsu motor ?
Unfortunately not. I will try to get on to that shortly
So I have a 1993 9.9mshr, do I need to get the reeds for the same year and model 15hp? Or are their specific ones for this upgrade?
This video pertains to 1998-2009 models. Not familiar with yours sorry
A little confused here...I have a 1999 Yam short stroke and plan on the upgrade. I only need to replace the reeds and use the old carb ? Or do I buy a new carb with the 15 hp reeds ? Also, do you recommend me changing-out the impeller ?
All you need is 15hp reeds. Carbs are the same. Impeller has nothing to do with power that's for the waterpump and yes if you haven't changed it I recommend it.
@@TRICKEDTINS Thank you for the response, have a good one !
I had the 15hp version. They are bulletproof.
Definitely. I still have 2 in the shed lol
question I have a Yamaha f9.9 fmhs 4 stroke is it possible to bring it to 15 hp? Thank you
I have a T9.9hp - 1994
4 Stroke, Electric Start Called a
"High Thrust"
The only
Difference I Can Find is the Huge Size of the
Propeller, looks almost out of place on the Motor?
11 3/4" Diameter X
9 1/4 Pitch
R --- Right Hand
I dont think so
will this work with bigger motors like a 20 hp?
I don't think so
QQ - I have 2002 8hp high thrust 4 stroke- can I jump that to a 15HP or just to 9.9?
8hp mptor can only go to 9.9
Thank you! Does anyone have the part number for the 9.9 carb that is needed?
is it possible to do this to a 1969 mercury 9.8hp 2 stroke?
Hahaha i have no idea. That motor is 14 years older than me.
@@TRICKEDTINS aww man. Those Yamahas are hard to come by
Can this be done with a Yamaha 4 hp 2 stroke to upgrade to a 9?
I think the 4 and the 6 are the same? Not really sure tho.
4 hp is a single cylinder
I have a 15hp yamaha 2 stroke 2003...could i get away with bigger reeds? Say 20hp reeds maybe?
Unfortunately, not. That engine is maxed out without doing machine work
What is the PART # on the thing that makes it a 15HP
Its called the reeds and ive already shared it in the comments
Do you have another for sell
Have 2 more that need work
Great video, Thanks. Do you know if a 2004 Yamaha 8hp 2 stroke can be upgraded to a higher horsepower?
No 8hp are maxed out
OK, thanks for getting back to me@@TRICKEDTINS
Hi guys dose anyone know if the cabis are different
Cabis?
@@TRICKEDTINS carburettors
Same
i have a yamaha 9,9 hp and its fourstroke, is there any chance i can upgrade it to get 15 hp? please help
I really don't know. Sorry
Consider Propeller
My 1994 4 stroke T9.9hp called
"High Thrust"
Has huge Prop.
11 3/4" Diam X
9 1/4" Pitch
R - Right Hand
Just bend the throttle stop out of the way. As told to me by Yamaha outboard mechanic.
dont i need a different prop if i switch the reed?
The prop is determined off of your weight displacement and size of the boat
Well... I may soon be adding the Yamaha to my search for new-to-me motors! Thank you.
Also, I have been looking HARD at just getting one of the new tohatsu 9.9 to convert to 20. I just looked through your video list over the last 11 months and didn't see it. Have you made that conversion video yet? (Can you point me in the right direction?)
Thank You for all you do!
~ Marty M. (a local)
No I have not made that video. It is stupid simple though. Just get a new 9.9 and buy the 20hp ecu. Plug and play.
@@TRICKEDTINS
Awesome! Just like the Suzuki then?
With the Suzuki you replace the ECM, and remove the choke disc from the intake and replace with the OEM spark arrestor screen. Done.
Can you upgrade a 4 stroke 9.9 to a 15?
I'm not a hundred percent sure I think you can swap the carburetors out
@@TRICKEDTINS might have to order one and try. Seems like there’s not much info on it. Everyone says something different which makes it hard.
Can i bend up the reeds by myself ?
Yes but they need to be spot on.
@@TRICKEDTINS thank you for the quick response :-)
Can i take those China reedvalves from ebay or do you recommend to take the original Yamaha reedvalves?
@@TRICKEDTINShi, I just bent mine to have 6mm gap, as seen in another blog. Problem is the prop spins really fast once I shift into gear. What do I need to adjust? And what do you mean by “it has to be spot on”?
Can you convert a 2018 Yamaha 15hp into a 20-25hp?
2018 is 4 stroke. Maybe the ecu can be upgraded but not sure. That's why everybody is running the suzukis and tohatsu outboards...
I got one, its the best engine ever. It just works and only sips gas😊
Yessir
Can I convert my 4 stroke 9.9 to 15 hp?
No only 2 stoke
Would a 20hp reed work?😅
Different engine
They're just like the hangKai 18
Idk?
Did u sell it
Forsure
so wild how they use the reeds opening as a restrictor.
Super simple
Had one few years ago. Had to sell needed $. Tried to find another for lingest time a ither just fell in my lap. Gonna keep this one. My ya these motors are dirt simple
The enduro models are wasted spark so both plugs fire at same.time. Keeps cost down and easier cheaper cdi unit.
I love my 4 strokes and dont touch two anymore, except then 9.9/15 yamaha
They are one of a kind
YinTin is gonna be fasttt once I do this!
Lmk when you are ready. I'll do it for ya, brotha! Saw your video. Can't believe you caught a fish on that bird! Solid content!
The 60 hp 4 stroke on my 16.5 foot foot told me it feels like a 75 hp. Does that count? Lol
I was just about to make a video on this! Let’s go fishing
Ha, that's funny. Honestly, I wasn't planning on doing this video. It was on a whim. Recorded and edited last night. Im ready to fish. This weekend isn't looking to good tho.
@@TRICKEDTINS let’s roll man. Time to hit the bay
I've got a 1991 yamaha 9.9 with only 110 hours done just as clean as this one
Nice
Dawg went through this last year, the 9.9 has a 9" pitch prop and the 15 has a 10.5" there are 2 differences
?? Prop is an easy swap. Most of the time they upgrade to stainless anyway
I think this is true for the 9.9D/15D (older model)
For this particular model, both have the same prop :-) (I’m 99% sure)
They are the same
I’m in Washington DC, looking for one of these 2 strokes… anyone?
I have 2 left. In Virginia Beach
Great, what’s the name of your shop? How can I contact you?
OMC all the way..
I had to turn on the closed captions because I own a 2 stroke and couldn't hear a damn thing he said.
Sorry, i thought the vocals were pretty clear?
That could be the most popular kicker motor in the N.W. for salmon and steelhead fishermen.