Just did something similar with 1 bottle seafoam to 1/2 gallon of gas. I had a 9.8 hp Evinrude 4 stroke that I had been trolling with and not running wide open enough due to this motor being a kicker motor. It started stalling out below 2.3 mph where I needed to be at. When running the seafoam the motor had excessive exhaust which cleaned up after about 10 minutes of high idle then it would troll down without stalling.....The marinas around here are backed up 2-3 weeks due to spring and the walleyes biting. This saved me money and valuable time. I think I paid $ 12.73 for the bottle at the auto part store.
That's awesome! Seafoam works great for sure. I'm glad it fixed your problem. No one likes paying crazy marina prices and then having to wait for them to fix your boat when you can do it yourself!
Thanks for your great video! Problem with 2003 Merc 125 2-stroke. Old fuel lines destroyed by ethanol. Found lots of brown chunks inside the pump. Rebuilt pump with Merc kit. Replaced all fuel lines. Replaced internal inline filter. Added secondary in-line glass filter outside of engine so I can see it's getting fuel. Removed carb tree, opened every bowl and checked for debris (almost none there) sprayed all jets with carb cleaner. Did *not* fool with the metering adjust screws! Plugs fairly new. Removed all old gas. Put in 2 gallons of new ethanol-free gas treated with STABIL. Symptom: when cold, starts and idles good. Runs rough getting up to plane about 3K. I tried disconnecting one plug wire at at time, then running it. Seems like #4 is not firing good. Ran it a while on lake. Shut off, won't restart. I see fuel in the clear filter. Will check the spark tomorrow. Thank you.
You did good replacing all the old fuel lines and filters. I did that on this engine too. Keep in mind, the outboard you are working on is much newer and built much different than this old Evinrude.
Time to do this again in getting ready for the upcoming spring fishing season! Going to go through, replace the lower unit oil, spark plugs, and check the plug wires..... This video was super, and has become almost religion...
Really appreciate you mentioning the smoke! Used Seafoam when I cranked a 1987 Honda 4 stroke for the first time in years. The amount of smoke had me nervous and thus searching UA-cam. I also found the tell-tale ejecting hot steamy water like a jet. Think it's the same reason?
No problem! Yea it smokes ALOT everytime you Seafoam anything. Have you checked you're water pump impeller lately? Sounds like you might need a new one. They say to replace them every 1-2 years depending on use. As long as you have a good hot stream of water coming out of the tell-tale you should be in pretty good shape. However, it's a good idea to visually inspect the water pump impeller every so often. They are rubber and do wear out over time!
I have an 87 Johnson 150 V6. Vro removed and mix 50:1 gas oil 87 Oct with stabil. I go out 1 to 2 times a week. I never experienced this issue. Yesterday we went out to a river system that was idle speed only. I know I need to get a link and sync done, and I suspect I'm running rich. I am about to remove the carbs and clean them because the gaskets are leaking. We idled around the river for at least 2 hours, never got to make a wake. This morning when I got up there was black goo all over my transom saver and running down the stern side of the outboard and some possibly even up in the engine.i cleaned it up and later came back out and there was another little dribble. Some say it's because the two stroke hate idle and it's nothing to worry about. Just throw a sea foam shock treatment then get back out and run her good. This is my first boat and I'm learning so much already. Oh I also recently replaced the sparks as well. I was trying to post pictures but since I'm new I guess I can't get. Thanks again for any help
Hey i got a question I got a 85 it works great out of the water on muffs but in the water it’s like it doesn’t go in to gear it does out of the water In the water it won’t acelarate
Does the prop spin when in the water? If it doesn't spin, something is wrong with the linkages. If it has trouble accelerating, it's probably the fuel pump diaphram!
The life of any out board motor. I’m still running a 1986 40 horsepower Johnson that came on my 18’ Alumacraft, it still has 130 psi on both cylinders and they hold pressure. When it gets time to go fishing again you know it going to run like it should.
Hi Matt, great video thank you. Just a quick question: I was all ready to do this treatment on my 28 year old Force 90 outboard but thought I'd do a compression test first. The compression on all 3 cylinders is incredibly good, right up at spec with literally only 1 Psi between them all. The engine runs fine generally but I wanted to do the treatment purely because of its age. My question is do I really need to do the shock treatment when the compression is so good? The tops of the pistons looked nice and clean too.
You don't have to do it, but it will help. My Force 85 HP runs WAY better after I did this to it and it has good compression. It changed the way it behaves and made it run much smoother. Give it a try and don't forget to add the 2-Stroke oil in the mix.
@@MattsShop Thanks for the reply, I hadn't noticed it...I was expecting an email maybe? It's the first time I've commented on a youtube vid :-) I did do it but I honestly don't think it made any difference, the thing is, I'd underestimated my motor. I had naturally presumed, as it is 28 years old, that it would be on its last legs, despite the fact that it runs well. Before I did the seafoam treatment (I did it because I'd already bought it!) I decided to take the carbs off to strip and clean them, to my surprise their wasn't the slightest trace of carbon, varnish...nothing, they were like brand new, literally like new! I had a good look in through the spark plug hole and the tops of the pistons were the same; immaculate, as was the reed block through the carb inlet, the fuel filter too was like new. Basically, I've struck gold, it's either been completely rebuilt (which I doubt because the gaskets fell to bits, were hard and brittle) or it's just done barely any hours at all since new. It looks like I'm the beneficiary of a boat that someone bought and never used. Anyway, thanks for the video and I'm sure it'll come in handy one day :-)
Cody B Good quesion! If it was me, I would just make sure the oil tank is topped off with oil and run it like normal. Just put 1 can of seafoam in .75-1 gallon of gas like I did in this video. No need to run double the amount of oil if it's already oil injected!
great video man I have a 1981 johnson 70 hp 2 stroke we took it out to lake today it idled fine but when we throttled it down it wanted to stall or bog down do you think seafoam could help plus the primer ball never got hard thanks
Seafoam is definitely going to make it run smoother, but it might not fix the problem. Did it go wide open? I'd check the fuel pump diaphragm if your motor was before the VRO oil injector fuel pump combo. You could have a dirty carb too. I'd still do the Seafoam though.
Jacob Johnson follow up on how it went? I have a 1978 15hp Johnson and when I go wide open it will go for about 5 seconds then bog down, I changed my fuel pump but sea foam is needed
In the 60s and 70s OMC sold a product called Engine Cleaner. that stuff was good, far better than the stuff marketed today. I think the old stuff was pure Carbon Tetrachloride, nasty stuff, but it worked well
Have you ever looked at the carbon deposits in a before and after? Sorry to say I have done that and saw very little difference. ( I used a 2 stroke and 4 stroke lawnmower and a bore scope ) and found very very little carbon removed.
Yea, I have seen the videos of before and afters. It did something and ran like a completely different motor after this. The idle was much better and it ran much smoother. I never tell people to use these chemical "quick fixes", but on an outboard it defiantly seems to help big time. I don't know why. Maybe because it removes carbon from the rings and since an outboard is such a large 2 stroke motor it makes a much bigger difference than a chainsaw. Although, you can't really see it visually?
Outboard motors I can not comment about. BUT I can only comment on what I have seen first hand. I even had someone tell me " See its working!! Look at the smoke " I then filled a brand new lawnmower and yes it smoked like a mofo. Contacting seafoam proved just as futile.. The placebo effect is what they count on.
Rockjock007 Yea, for outboards it really works well. That's what it was originally made for SEAfoam. It was designed back when they would use regular motor oil in 2 strokes before they had all the oil technology they had today, or at least that's how the story goes. Carbon builds around the rings and causes them to stick and can cause engine failure. Especially on outboards because they are so old 30+ yrs. Everything else I have used it on I haven't really seen much improvement. On an outboard it is night and day believe it or not.
The primer is just that, a primer, to fill the bowl for starting. Once running the engines fuel pump does the work, the bulb has no bearing on operation.
I have an 80’s mercury and it’s not an outboard will that work and I have a problem where I put the throttle all the way down and it revvs up a lot but it doesn’t go fast would this fix it??
Sounds like you have some broken parts or improperly adjusted linkages. This will not really fix a broken motor. It just helps tune it up, clean out the carbon, clean the carbs a little, and make sure the rings aren't sticking. Pretty much just good maintenance. Feel free to try it though.
I didn't notice a ton of carbon wash out, the engine seems to be a bit better on the hole shot for lack of a better word. Also of note I went through and replaced all the fuel lines before and after the filter...
I've been using Mercury Powertune as well. While they both seem to work well, I prefer Mercury products since they are backed by the OEM. Crazy how much this helps with hole shots and rough idling. It was actually recommended to me by a marine mechanic. I thought my carbs needed rebuilt and he told me to try this stuff. Saved me a few hundred bucks, easy.
+JAY TV Yea, it works amazingly. That's why I made this video. To show people how easy it is to seafoam an outboard. I know Mercury, Evinrude, and Yamaha all have their "Engine Tuner" fuel additives. Good to know that the Mercury one works well!
To make this process much easier as much gas as these things guzzle just add the can of seafoam to your gas tank & take it out on the water and run it. I use Seafoam in my truck,bike,lawnmowers but just a can per 5 or 6 gallons of gas works wonders to keep the carbs & injectors cleaned. Also a big fan of Marvel's Mystery Oil for an upper cylinder lubricant.
Yea that will keep your outboard running well. However, this is a SHOCK treatment designed to un-stick cylinder rings and attempt to clear out any carbon that has built up over 30+ years. Kinda two different purposes.
Sorry, really dumb question here. I can't the motor idoling and the fuel bulb won't retain fuel after little bit. It's a brand new fuel bulb. I feel like this is something extremely simple I am missing.
Yes, this method is much better. If you just dump the can in your tank it dilutes it too much. This is a really popular method on the internet and works extremely well. All of the 2stroke outboards I have done this to immediately run better. Their idle improves to the point that the run like completely different motors, no exaggeration. Your results may vary though depending on the age of your motor. Thanks for watching, don't forget to subscribe!
great vid, but just a quick note..if you disconnect the fuel to the motor and pump a gallon of gas from the tank into a gas can you dont have to bother with mixing up 1 gallon, nice boat btw😎👍
@@MattsShop Hey Matt, thanks for the reply!! I just bought the boat and I did a sea foam treatment, and bought new plugs and put them in tonight. Runs great in a bucket, but haven't put on lake yet to put it under load. I checked compression also and I'm at 100 psi on each cylinder, so I think I'm good there. So you think if it still does it, check fuel pump diaphragm next? Thanks bro for helping and any more advice! Oh..also fuel system is good, just coming from 5 gal can to ball and into motor. Pretty basic sety Up.
@Mike Hayden thanks man, I checked stator and trigger also with a dva adapter, so I guess I will be doing the carbs next. I was trying to avoid that..lol
@Mike Hayden thanks again, this motor looks like new to be as old as it is. It really sucks the gas..lol..but I will keep in touch and let you know how it went. Once again thanks brother, I'm going to order these rebuild kits. Been alittle cold here in kentucky to crappie fish, but soon..lol
Dumb question...why do you add the additional (black) hose? Cant you just disconnect the line from the tank instead of the fuel bulb/pump where you add the black hose? And then stick that same original gas line into the gas tank? Or is the additional (black) hose a must?
+Sal Palos That's not a dumb question at all. I just used a different piece of hose because I didn't feel like disconnecting the tank's fuel line because it is hard to get to. You can just disconnect your tank's fuel line and stick it into the seafoam/gas can if that's the easiest way for you to do it.
Been a big fan of doing this on all kinds of motors for years. Plan on changing the spark plug(s) when you are done, because blowing all this crap out of the fuel/combustion system tends to wreck 'em. Also -- Obligatory tree-hugger comment --- Please don't do this on the lake or at the dock...all that crap getting pumped in the water is bad, mm'kay? Do it at home where you can better contain the spill and runoff.
Matt I've got a 1988 120V4 Looper similar motor, it's been running great. Just last weekend started losing power once on a plane at say 4000RPM just bogs down. Stop then runs for a bit and does the same thing again. Runs perfect at say 2500RPM got me home anyway. Do you think this might help that problem?
I would defiantly do this to start out. It sounds like you might have a fuel issue. Check all of the hoses, clamps, and carb mounting bolts. Make sure there are no fuel/air leaks ANYWHERE. Have you cleaned/rebuilt the carbs lately? I would also check the fuel pump to make sure that it is working correctly.
I have a 1998 Force 120. It is not running with all of its power. When alone its runs great, but when I have 1 or 2 guest, it has a HARD time planning. Also has a lot of trouble idling. Will this help me? Mechanics are weeks backed up.
+Brandon Freeman Yes! That is a Mercury Force and a pretty good motor. This is the best place to start. You should check your fuel pump diaphram. It is probably old and hard. It is just a thin piece of rubber and easy to replace if your motor is pretty corrosion free.
The whole fuel pump assy was replaced along with the fuel line and primer bulb. It is pushing a 1998 Wellcraft 190cc center console ( a pretty heavy boat) but I've seen vides online of it pushing big boats at comfortable speeds. I will do this process in morning, I really hope it helps. Thanks for your speedy response!!
+Brandon Freeman That's good it was replaced so you can rule that out. I am familliar with that exact boat. They are real nice and well built, but they are HEAVY you are right. Do this first and then check the compression of the cylinders to make sure it is in good shape internally. What are the specs of your prop? If you have a high pitched prop like a 21 pitch prop this would explain the lack of torque. You're welcome for the quick response! Thanks for watching.
+David Jessee Great point! The reason I was doing this is to clean out the carbon in the motor. You are right, if you are wanting to clean out the carb you should hit the throttle a little bit.
I added just a little extra oil to my gallon to compensate for the volume of the Sea Foam. Whether I needed to or not, I don't know, but I felt better doing it.
It's just gunk coming out of your motor. Some people see this and some do not. It's a good thing! Unless it smells like rotten eggs. Then it is lower unit oil lol.
Links to supplies in description (amazon affiliate)
Just did something similar with 1 bottle seafoam to 1/2 gallon of gas. I had a 9.8 hp Evinrude 4 stroke that I had been trolling with and not running wide open enough due to this motor being a kicker motor. It started stalling out below 2.3 mph where I needed to be at. When running the seafoam the motor had excessive exhaust which cleaned up after about 10 minutes of high idle then it would troll down without stalling.....The marinas around here are backed up 2-3 weeks due to spring and the walleyes biting. This saved me money and valuable time. I think I paid $ 12.73 for the bottle at the auto part store.
That's awesome! Seafoam works great for sure. I'm glad it fixed your problem. No one likes paying crazy marina prices and then having to wait for them to fix your boat when you can do it yourself!
I have the same Engine but it's Tohatsu , My question is the engine is only one year old. Do I need this treatment on the new engine?
It's not going to do much on a new engine. You can put some in the gas tank if you want.
I did the exact same thing prior to watching this video & ran it balls out. What a difference !
I know right? It works great.
Why would there be a broken piston ring???
@Marc Poindexter, you sure youre on the right comment thread ??? Dummy !
@Marc Poindexter, Thanks for proving my point dummy. You really shouldnt be talking to trees silly
Thanks for your great video!
Problem with 2003 Merc 125 2-stroke. Old fuel lines destroyed by ethanol. Found lots of brown chunks inside the pump. Rebuilt pump with Merc kit. Replaced all fuel lines. Replaced internal inline filter. Added secondary in-line glass filter outside of engine so I can see it's getting fuel. Removed carb tree, opened every bowl and checked for debris (almost none there) sprayed all jets with carb cleaner. Did *not* fool with the metering adjust screws! Plugs fairly new. Removed all old gas. Put in 2 gallons of new ethanol-free gas treated with STABIL.
Symptom: when cold, starts and idles good. Runs rough getting up to plane about 3K. I tried disconnecting one plug wire at at time, then running it. Seems like #4 is not firing good. Ran it a while on lake.
Shut off, won't restart.
I see fuel in the clear filter. Will check the spark tomorrow. Thank you.
You did good replacing all the old fuel lines and filters. I did that on this engine too. Keep in mind, the outboard you are working on is much newer and built much different than this old Evinrude.
Time to do this again in getting ready for the upcoming spring fishing season! Going to go through, replace the lower unit oil, spark plugs, and check the plug wires..... This video was super, and has become almost religion...
Yup, you gotta check all that stuff every spring. Don't forget to check any fuel filters too. Haha you are right. Maintainance is like a religion.
How often should you do this? Or how can you tell you have done it enough or not enough? I have a 15 HP Yamaha 2 stroke outboard. Thanks.
Once at the beginning of every growing season. No, just mix up a gallon and run it all.
Really appreciate you mentioning the smoke! Used Seafoam when I cranked a 1987 Honda 4 stroke for the first time in years. The amount of smoke had me nervous and thus searching UA-cam. I also found the tell-tale ejecting hot steamy water like a jet. Think it's the same reason?
No problem! Yea it smokes ALOT everytime you Seafoam anything. Have you checked you're water pump impeller lately? Sounds like you might need a new one. They say to replace them every 1-2 years depending on use. As long as you have a good hot stream of water coming out of the tell-tale you should be in pretty good shape. However, it's a good idea to visually inspect the water pump impeller every so often. They are rubber and do wear out over time!
Thanks for the reply! Should I be concerned that the tell-tale stream is not a dribble, but actually has some force behind it?
+John Reed You're welcome. No, not at all. You want it to have a good bit of force behind it!
Very kind of you! Thankful to find your channel - appreciate everything you're investing into the community
I have an 87 Johnson 150 V6. Vro removed and mix 50:1 gas oil 87 Oct with stabil. I go out 1 to 2 times a week. I never experienced this issue. Yesterday we went out to a river system that was idle speed only. I know I need to get a link and sync done, and I suspect I'm running rich. I am about to remove the carbs and clean them because the gaskets are leaking. We idled around the river for at least 2 hours, never got to make a wake. This morning when I got up there was black goo all over my transom saver and running down the stern side of the outboard and some possibly even up in the engine.i cleaned it up and later came back out and there was another little dribble. Some say it's because the two stroke hate idle and it's nothing to worry about. Just throw a sea foam shock treatment then get back out and run her good. This is my first boat and I'm learning so much already. Oh I also recently replaced the sparks as well.
I was trying to post pictures but since I'm new I guess I can't get.
Thanks again for any help
How much oil should I put in the gas can with my 2 stroke fuel injected motor?
You need 2.56 Oz of oil per gallon. You need a 50:1 ratio of TC-W3 marine oil. It's better to get some out of the tank, but I guess you don't premix?
Matt's Shop I do not premix. Thank you 😀
Hey i got a question I got a 85 it works great out of the water on muffs but in the water it’s like it doesn’t go in to gear it does out of the water In the water it won’t acelarate
Does the prop spin when in the water? If it doesn't spin, something is wrong with the linkages. If it has trouble accelerating, it's probably the fuel pump diaphram!
@@MattsShop thank you I’ll do some research on that but yep the prop spins while on land not sure in the water
The life of any out board motor. I’m still running a 1986 40 horsepower Johnson that came on my 18’ Alumacraft, it still has 130 psi on both cylinders and they hold pressure. When it gets time to go fishing again you know it going to run like it should.
Yea, Seafoam is a great tune up for sure!
Is it normal to see a bit of sludge leak from prop exhaust a day after doing this?
Yes! That means it worked!!
Hi Matt, great video thank you. Just a quick question: I was all ready to do this treatment on my 28 year old Force 90 outboard but thought I'd do a compression test first. The compression on all 3 cylinders is incredibly good, right up at spec with literally only 1 Psi between them all. The engine runs fine generally but I wanted to do the treatment purely because of its age. My question is do I really need to do the shock treatment when the compression is so good? The tops of the pistons looked nice and clean too.
You don't have to do it, but it will help. My Force 85 HP runs WAY better after I did this to it and it has good compression. It changed the way it behaves and made it run much smoother. Give it a try and don't forget to add the 2-Stroke oil in the mix.
@@MattsShop Thanks for the reply, I hadn't noticed it...I was expecting an email maybe? It's the first time I've commented on a youtube vid :-) I did do it but I honestly don't think it made any difference, the thing is, I'd underestimated my motor. I had naturally presumed, as it is 28 years old, that it would be on its last legs, despite the fact that it runs well. Before I did the seafoam treatment (I did it because I'd already bought it!) I decided to take the carbs off to strip and clean them, to my surprise their wasn't the slightest trace of carbon, varnish...nothing, they were like brand new, literally like new! I had a good look in through the spark plug hole and the tops of the pistons were the same; immaculate, as was the reed block through the carb inlet, the fuel filter too was like new. Basically, I've struck gold, it's either been completely rebuilt (which I doubt because the gaskets fell to bits, were hard and brittle) or it's just done barely any hours at all since new. It looks like I'm the beneficiary of a boat that someone bought and never used. Anyway, thanks for the video and I'm sure it'll come in handy one day :-)
I have a question. What If your motor is oil injected? Should I still mix a gallon of gas?
Cody B Good quesion! If it was me, I would just make sure the oil tank is topped off with oil and run it like normal. Just put 1 can of seafoam in .75-1 gallon of gas like I did in this video. No need to run double the amount of oil if it's already oil injected!
I won’t hurt nuthing ! Mix some oil in gas to be safe!
Hello did you have to mix oil in the gas container?
Yes
@@MattsShop If you have an oil pump can you use that for the oil or does the mixture have to be in one container
is that actually carbon burning off that makes the smoke or is that the seafoam product burning and creating the smoke
great video man I have a 1981 johnson 70 hp 2 stroke we took it out to lake today it idled fine but when we throttled it down it wanted to stall or bog down do you think seafoam could help plus the primer ball never got hard thanks
Seafoam is definitely going to make it run smoother, but it might not fix the problem. Did it go wide open? I'd check the fuel pump diaphragm if your motor was before the VRO oil injector fuel pump combo. You could have a dirty carb too. I'd still do the Seafoam though.
thanks I will keep you updated
+Jacob Johnson Ok thanks, let me know how it goes.
Jacob Johnson follow up on how it went? I have a 1978 15hp Johnson and when I go wide open it will go for about 5 seconds then bog down, I changed my fuel pump but sea foam is needed
Yea, Seafoam can make a huge difference for sure. If you've changed the fuel pump it sounds like you got a problem elsewhere.
my motor has an oiler but it' 2 stroke. Do i still pre mix or just use reg gas and let the oiler do it's thing
Don't mess with the oiler. Just run it how you always would. That would be double oil
@@MattsShop okay ty
In the 60s and 70s OMC sold a product called Engine Cleaner. that stuff was good, far better than the stuff marketed today. I think the old stuff was pure Carbon Tetrachloride, nasty stuff, but it worked well
Great info thanks. I'm sure it worked a lot better than the stuff they sell today.
Have you ever looked at the carbon deposits in a before and after? Sorry to say I have done that and saw very little difference. ( I used a 2 stroke and 4 stroke lawnmower and a bore scope ) and found very very little carbon removed.
Yea, I have seen the videos of before and afters. It did something and ran like a completely different motor after this. The idle was much better and it ran much smoother. I never tell people to use these chemical "quick fixes", but on an outboard it defiantly seems to help big time.
I don't know why. Maybe because it removes carbon from the rings and since an outboard is such a large 2 stroke motor it makes a much bigger difference than a chainsaw. Although, you can't really see it visually?
Outboard motors I can not comment about. BUT I can only comment on what I have seen first hand. I even had someone tell me " See its working!! Look at the smoke " I then filled a brand new lawnmower and yes it smoked like a mofo. Contacting seafoam proved just as futile.. The placebo effect is what they count on.
Rockjock007 Yea, for outboards it really works well. That's what it was originally made for SEAfoam. It was designed back when they would use regular motor oil in 2 strokes before they had all the oil technology they had today, or at least that's how the story goes. Carbon builds around the rings and causes them to stick and can cause engine failure. Especially on outboards because they are so old 30+ yrs. Everything else I have used it on I haven't really seen much improvement. On an outboard it is night and day believe it or not.
I have to believe you on that my friend.
Rockjock007 Yea! I never believed it until I tried it either.
Having a hard time finding a 1979 Evinrude 115 carb kit with the same size jet any help???
I use Boats.net pretty sure that outboard has "fixed" jets you don't remove. My Evinrude 140 does.
I'm surprised it stayed running with the primer bulb horizontal like that.
Doesn't matter once you get 'er goin.
The primer is just that, a primer, to fill the bowl for starting. Once running the engines fuel pump does the work, the bulb has no bearing on operation.
I have a 99 Yamaha 2 stroke with the precision blend. Do I still need to premix in the aux tank?
I have an 80’s mercury and it’s not an outboard will that work and I have a problem where I put the throttle all the way down and it revvs up a lot but it doesn’t go fast would this fix it??
Sounds like you have some broken parts or improperly adjusted linkages. This will not really fix a broken motor. It just helps tune it up, clean out the carbon, clean the carbs a little, and make sure the rings aren't sticking. Pretty much just good maintenance. Feel free to try it though.
U spun a prop
Dose this work with carbureted or just fuel injectors??:/ or 4 stroke engines ??
It works on all outboards! Just gotta figure out how to get the gas/seafoam mix into the engine on the newer outboards.
Adding the Seafoam will not dilute the gas/oil ratio in the one gallon can?
Nope! It will not dilute the oil/gas ratio. It is perfectly safe to do it this way. Thanks for watching, don't forget to subscribe!
You can run seafoam at a 50% mix
+Multileege Adendum what do you mean? Half seafoam half gas?
Matt's Shop yes that's correct
Great video! Have a Johnson 90 dated 1988 that I'm gonna give this a go on....
Thanks! Yea, give it a shot. It should help.
Any difference ?
I didn't notice a ton of carbon wash out, the engine seems to be a bit better on the hole shot for lack of a better word. Also of note I went through and replaced all the fuel lines before and after the filter...
Thanks for the update. I noticed a really improved idle. You were smart for replacing all of the fuel lines.
My 1973 evinrude 50hp won't stay running do you think seafoam would help it
I've been using Mercury Powertune as well. While they both seem to work well, I prefer Mercury products since they are backed by the OEM. Crazy how much this helps with hole shots and rough idling. It was actually recommended to me by a marine mechanic. I thought my carbs needed rebuilt and he told me to try this stuff. Saved me a few hundred bucks, easy.
+JAY TV Yea, it works amazingly. That's why I made this video. To show people how easy it is to seafoam an outboard. I know Mercury, Evinrude, and Yamaha all have their "Engine Tuner" fuel additives. Good to know that the Mercury one works well!
To make this process much easier as much gas as these things guzzle just add the can of seafoam to your gas tank & take it out on the water and run it. I use Seafoam in my truck,bike,lawnmowers but just a can per 5 or 6 gallons of gas works wonders to keep the carbs & injectors cleaned. Also a big fan of Marvel's Mystery Oil for an upper cylinder lubricant.
Yea that will keep your outboard running well. However, this is a SHOCK treatment designed to un-stick cylinder rings and attempt to clear out any carbon that has built up over 30+ years. Kinda two different purposes.
So...My 2cycle 70hp Mercury outboard runs fine until I bring it to idle. It kept stalling. Do you think Seafoam will help me?
Do this treatment and then tune up everything else.
Clean carburetor
I have a 225 Yamaha 2 stroke it idles kind of rough and when I put it into gear it shuts off.. would this fix my problem?
It can help a rough idle.
Sorry, really dumb question here. I can't the motor idoling and the fuel bulb won't retain fuel after little bit. It's a brand new fuel bulb. I feel like this is something extremely simple I am missing.
Can't keep*
+Austin Howard Have you checked the fuel pump diaphram and made sure it isn't dry, hard, and plasticy? Also, have the carbs been rebuilt recently?
Hahahaha nm had the primer bulb backwards...wow
+Austin Howard HAHAHA That's funny! Yea that little arrow's direction is pretty important.
It says use one Oz per gallon you used the whole lot of it?
Yea, this is for "Shock treatment".
What year outboard is that? Does it have oil injection or do you premix?
It is a 1986 Evinrude 150XP. It does have a VRO oil injection pump, but it is disabled. I run premixed gas in it.
I have a question, I have a vro system still intact on my Johnson 130, will the vro still push oil when the gas line is disconnected?
I do not remember exactly as mine is disconnected and I run pre-mixed gas. Yours is still hooked up and working right?
Thank you for this video. I had planned to just dump the entire can into my primary tank but your method is much better in my opinion.
Yes, this method is much better. If you just dump the can in your tank it dilutes it too much. This is a really popular method on the internet and works extremely well. All of the 2stroke outboards I have done this to immediately run better. Their idle improves to the point that the run like completely different motors, no exaggeration. Your results may vary though depending on the age of your motor. Thanks for watching, don't forget to subscribe!
great vid, but just a quick note..if you disconnect the fuel to the motor and pump a gallon of gas from the tank into a gas can you dont have to bother with mixing up 1 gallon, nice boat btw😎👍
Thanks, that's a great point! Never thought about doing that.
Mark Popovac It says on the cam treats one gallon.
Hey Matt I have a 89 merc 45 hp classic 50 that runs great until I hit 3/4 throttle or more..then it starts missing, any advice..thanks man!
Have you checked or replaced the fuel pump diaphragm and gone through the fuel system?
@@MattsShop Hey Matt, thanks for the reply!! I just bought the boat and I did a sea foam treatment, and bought new plugs and put them in tonight. Runs great in a bucket, but haven't put on lake yet to put it under load. I checked compression also and I'm at 100 psi on each cylinder, so I think I'm good there. So you think if it still does it, check fuel pump diaphragm next? Thanks bro for helping and any more advice! Oh..also fuel system is good, just coming from 5 gal can to ball and into motor. Pretty basic sety
Up.
@Mike Hayden thanks man, I checked stator and trigger also with a dva adapter, so I guess I will be doing the carbs next. I was trying to avoid that..lol
@Mike Hayden thanks again, this motor looks like new to be as old as it is. It really sucks the gas..lol..but I will keep in touch and let you know how it went. Once again thanks brother, I'm going to order these rebuild kits. Been alittle cold here in kentucky to crappie fish, but soon..lol
@Mike Hayden well do mike, thanks brother!! If I have any issues I'll hit you up, but I have the manuals so I should be ok 🤞🤞🤞
Do you still mix 2 stroke oil if your oil pump works?
That would double the oil
Dumb question...why do you add the additional (black) hose? Cant you just disconnect the line from the tank instead of the fuel bulb/pump where you add the black hose? And then stick that same original gas line into the gas tank?
Or is the additional (black) hose a must?
+Sal Palos That's not a dumb question at all. I just used a different piece of hose because I didn't feel like disconnecting the tank's fuel line because it is hard to get to.
You can just disconnect your tank's fuel line and stick it into the seafoam/gas can if that's the easiest way for you to do it.
thanks brotha! already subbed....but appreciate it....doing this tonight/tomorrow!
+Sal Palos No problem! Thanks for subbing!
Its safe for 4 stroke?
Yes, don't put pre-mix though obviously.
No lo puede hacer los comentarios en español.
Una pena.
When doing this on a 2stroke do you still mix oil in like normal?
Yes, absolutely!
Been a big fan of doing this on all kinds of motors for years. Plan on changing the spark plug(s) when you are done, because blowing all this crap out of the fuel/combustion system tends to wreck 'em.
Also -- Obligatory tree-hugger comment --- Please don't do this on the lake or at the dock...all that crap getting pumped in the water is bad, mm'kay?
Do it at home where you can better contain the spill and runoff.
I agree. Change the spark plugs and do it out of the water.
Neighbor's would be super pissed as this would smoke up the entire neighborhood.
Will this fix the high speed jet blockage, too?
Probably not. The best way to clean carburetor jets is to take them apart and manually clean them. The chemical cleaners suck.
I think it does do the high speed jets, just gotta throttle up a few times during the run, get all the juice up in here...
I think your only good to use it on 4 strokes. Their website said gas ,4 stroke and Diesel engines.
Nahh, it was orginally made for old 2-Stroke outboards. Hence the name, Seafoam. You're good!
Sea foam is good for all 2-4-6-8- cycle engines
Matt I've got a 1988 120V4 Looper similar motor, it's been running great. Just last weekend started losing power once on a plane at say 4000RPM just bogs down. Stop then runs for a bit and does the same thing again. Runs perfect at say 2500RPM got me home anyway.
Do you think this might help that problem?
I would defiantly do this to start out. It sounds like you might have a fuel issue. Check all of the hoses, clamps, and carb mounting bolts. Make sure there are no fuel/air leaks ANYWHERE. Have you cleaned/rebuilt the carbs lately? I would also check the fuel pump to make sure that it is working correctly.
Would this work on my 79 evinrude 6hp?
Yes! It will work for almost any outboard, especially older outboards.
@@MattsShop I'll give it a go
Yea, give it a shot
@@MattsShop basically I've been told I won't find it in Australia. I've been told to buy something similar from evinrude
Does Amazon have it?
I have a 1998 Force 120. It is not running with all of its power. When alone its runs great, but when I have 1 or 2 guest, it has a HARD time planning. Also has a lot of trouble idling. Will this help me? Mechanics are weeks backed up.
+Brandon Freeman Yes! That is a Mercury Force and a pretty good motor. This is the best place to start. You should check your fuel pump diaphram. It is probably old and hard. It is just a thin piece of rubber and easy to replace if your motor is pretty corrosion free.
The whole fuel pump assy was replaced along with the fuel line and primer bulb. It is pushing a 1998 Wellcraft 190cc center console ( a pretty heavy boat) but I've seen vides online of it pushing big boats at comfortable speeds. I will do this process in morning, I really hope it helps. Thanks for your speedy response!!
+Brandon Freeman That's good it was replaced so you can rule that out. I am familliar with that exact boat. They are real nice and well built, but they are HEAVY you are right. Do this first and then check the compression of the cylinders to make sure it is in good shape internally.
What are the specs of your prop? If you have a high pitched prop like a 21 pitch prop this would explain the lack of torque.
You're welcome for the quick response! Thanks for watching.
Will do. Thanks
I will keep you posted on my progress.
Thanks Again!!!
+Brandon Freeman ok cool. You're welcome!
This is all good to clean the idle circuit. But if you don't rap the throttle the seafoam will not reach the rest of the carb.
+David Jessee Great point! The reason I was doing this is to clean out the carbon in the motor. You are right, if you are wanting to clean out the carb you should hit the throttle a little bit.
will the seam foam( 16 ounces)off set the oil and gas ratio?
No! It will not hurt your motor. Don't worry about it. Just mix the gas up using the same ratio of oil you always use.
Thanks for the response, I was concerned about it but I will go ahead and do it thanks again!
Yea, don't worry about it. You're welcome.
I added just a little extra oil to my gallon to compensate for the volume of the Sea Foam. Whether I needed to or not, I don't know, but I felt better doing it.
better safe than sorry!
Thanks brother!
Any time!
I did this today and now I have milky looking oil coming out of my prop
It's just gunk coming out of your motor. Some people see this and some do not. It's a good thing!
Unless it smells like rotten eggs. Then it is lower unit oil lol.
@@MattsShop which has nothing to do with putting seafoam in your fuel(milky oil)
What about milky in carbs
Anyone ever had problems with their 2 stroke after doing this?
Never!
Awesome thanks I'll do it to my 81 evinrude 25hp this spring !
I need to do mine again in the Spring.
Please don't do it in any body of water, we have enough chemicals there already!😢
I know right! They say all that stuff breaks down though.
Will this work on my 1975 Evinrude 70
model 70573B
Yes