sneak_e_pete Posted April 8, 2015 Report Share Posted April 8, 2015 I have a Yamaha F20 and want to run some seafoam through it. Do you just add it to the gas 2oz per gallon? Link to comment Share on other sites More sharing options...
ketchenany Posted April 8, 2015 Report Share Posted April 8, 2015 that's what I do with my mower and snowblower. Link to comment Share on other sites More sharing options...
Consigliere Posted April 9, 2015 Report Share Posted April 9, 2015 It's a decarb mainly so can do a few things. What you are doing is for just general preventative measures. This is to clear up some rough running motors or a couple times per year. Spray it into cylinders. Soak for a bit. Run engine. Run engine spray into carbs until engine starts to big down. Let run for a while again. Repeat. The shock method using gas is mix 3 litres with a whole can and run that through the engine. Link to comment Share on other sites More sharing options...
DRIFTER_016 Posted April 9, 2015 Report Share Posted April 9, 2015 It can also be added to the crankcase to clean the lower end. You have to change the oil afterward though. I generally run a can in a full (18 gallon) tank of fuel once or twice a year to keep the fuel system clean. Link to comment Share on other sites More sharing options...
kickingfrog Posted April 9, 2015 Report Share Posted April 9, 2015 (edited) What if the gas has already been treated with a stabilizer? I always put some stabilizer in the gasoline when I buy it but if I'm going to run seafoam should I skip it? Edited April 9, 2015 by kickingfrog Link to comment Share on other sites More sharing options...
DRIFTER_016 Posted April 9, 2015 Report Share Posted April 9, 2015 No problem, I use stabilizer in every motor I own except my truck as it doesn't last nearly as long. Link to comment Share on other sites More sharing options...
Sinker Posted April 9, 2015 Report Share Posted April 9, 2015 I use seafoam as a stabilizer. 3-4oz (I just eyeball it) per tank. For a good de-carbon I run a full can thru 20L of fuel. I do that in the late fall. S. Link to comment Share on other sites More sharing options...
ecmilley Posted April 9, 2015 Report Share Posted April 9, 2015 instructions are on the bottle for use. Link to comment Share on other sites More sharing options...
lookinforwalleye Posted April 9, 2015 Report Share Posted April 9, 2015 I had a issue with a check engine light in the Jeep in the fall and a can of Seafoam fixed that!!! Link to comment Share on other sites More sharing options...
fishindevil Posted April 10, 2015 Report Share Posted April 10, 2015 I run it in my Yamaha 50hp four stroke outboard & my snowmobile too as well as snowblower and you can mix it several ways as guys have already said !!! Been using it for years no issues with anything ..... I run it every other tank or so and use it as stabilizer as well during the winter too Link to comment Share on other sites More sharing options...
Regan Thompson Posted April 10, 2015 Report Share Posted April 10, 2015 We use for yearly maintenance on our rental 9.9 two stroke motors as follows: First, mix fuel stabilizer in a tank Run the motor with fuel stabilizer while spraying SeaFoam into the air filter while revving Let it run for a couple of minutes Turn off the motor and disconnect fuel Pull out the spark plugs Spray SeaFoam in cylinders while pulling over the engine slowly Replace spark plugs Link to comment Share on other sites More sharing options...
Mister G Posted April 11, 2015 Report Share Posted April 11, 2015 If you're not having any problems why waist your money on Seafoam. Don't fix what's not broken. Link to comment Share on other sites More sharing options...
bigbuck Posted April 11, 2015 Report Share Posted April 11, 2015 Just add to the gas to help keep the cylinder heads and valves clean. Do it for a tank or two now at the beginning of the season and do again at end of season so next year you are good to go with no work to do on your boat. Link to comment Share on other sites More sharing options...
Joeytier Posted April 11, 2015 Report Share Posted April 11, 2015 I guess I'm a sucker for wasting about 5 whole dollars pre year for easy preventative maintenance on all my motors. Just put about half a can in snowmobile for its last tank of the season. Hopefully burn it all tomorrow and she'll be ready to fog for the summer. Link to comment Share on other sites More sharing options...
moxie Posted April 11, 2015 Report Share Posted April 11, 2015 I run it in my Yamaha 50hp four stroke outboard & my snowmobile too as well as snowblower and you can mix it several ways as guys have already said !!! Been using it for years no issues with anything ..... I run it every other tank or so and use it as stabilizer as well during the winter too X2 but in an oil inj 2 stroke. Never an issue. Link to comment Share on other sites More sharing options...
ecmilley Posted April 11, 2015 Report Share Posted April 11, 2015 I love people that dont stabilize fuel or do any preventative maintenance gonna help pay for the two legend extremes and alderbarons coming my way Link to comment Share on other sites More sharing options...
Smokercrafty Posted April 12, 2015 Report Share Posted April 12, 2015 If you're not having any problems why waist your money on Seafoam. Don't fix what's not broken. X2......... Link to comment Share on other sites More sharing options...
Sinker Posted April 12, 2015 Report Share Posted April 12, 2015 If you're not having any problems why waist your money on Seafoam. Don't fix what's not broken. Its called preventative maintenance. Pay a little now, or a lot later. Your choice. Im running a '93 2 stroke that has never run fuel with no stabilizer, and been seafoamed every fall. Not a single issue in all those years. Still runs like new. S. Link to comment Share on other sites More sharing options...
HTHM Posted April 12, 2015 Report Share Posted April 12, 2015 Its called preventative maintenance. Pay a little now, or a lot later. Your choice. Im running a '93 2 stroke that has never run fuel with no stabilizer, and been seafoamed every fall. Not a single issue in all those years. Still runs like new. S. That is also why my Jetta is over 300000 Km trouble free without excess oil consumption between regularly scheduled oil and timing belt changes. (Darn I just jinxed myself) Link to comment Share on other sites More sharing options...
Freshtrax Posted April 12, 2015 Report Share Posted April 12, 2015 I don't believe in snake oils for motors. But seafoam is the real deal. Coming from a certified gear head ex mechanic. Link to comment Share on other sites More sharing options...
fishindevil Posted April 12, 2015 Report Share Posted April 12, 2015 Yes it just plain works !!! And with today's garbage corn gas !!!! Why take a chance !!!! Like I said as well never an issue using it and will continue !!!! Even top notch marine mechanics who build & repair high end engines & outboards swear by it and use it in their own engines as well !!!! Example I had a used snowblower would not start or stay running figured it had old gas in it for a long time drained out the old gas put about an oz or 2 in it with about 1/2 liter of gas first I let the seafoam sit in it for a day cranked it over a few times added the gas and it started right up and ran great !!!! Just one example of how well it's worked for me !!! To each their own I guess .... Link to comment Share on other sites More sharing options...
aplumma Posted April 12, 2015 Report Share Posted April 12, 2015 As some know I restore old motorcycles, cars and small engines just as a hobby and the number of carburetors I have rebuilt is in the hundreds now. The size of the jets and the passages in a carb. can be clogged by poor fuel and ethanol quickly. If you haven't been inside of a carb the passages as well as the jets are in some cases as small as a hairbrush bristle. The amount of sludge that i remove from the bottom of the float bowls that have been put away wet without stabilizer is just sick. I use stabilizers in all of my engines that will have gas sitting in it for longer than 3 weeks. The others get treated twice a year. For a motorcycle RnR on a carb set is usually $300.oo that buys stabilizers for many a year. Art Link to comment Share on other sites More sharing options...
ecmilley Posted April 12, 2015 Report Share Posted April 12, 2015 Have used it for years and the only thing better for cleaning is mopar combustion cleaner but that really is only for use by people in the industry and thats all it does is decarbonize. Use seafoam as preventitive maintenenace and stabilizer in everything i own boats car truck sleds lawnmower chainsaw trimmer ect all start and run perfect everyspring and fall. had a polaris sled wrapped up in yard for two years without use but stabilized with seafoam started on 5 th pull ran good for rest of winter no issues. the people that don't use it esp in 2 stroke stuff those carb jets will slowly close up with grunge and dirt from ethanol so when your thinking this is the best my 9.9 has ever run usually means your about to have a lean meltdown of a piston or two Link to comment Share on other sites More sharing options...
Freshtrax Posted April 12, 2015 Report Share Posted April 12, 2015 Anyone know where to buy it buy the gallon? Link to comment Share on other sites More sharing options...
Old Ironmaker Posted April 12, 2015 Report Share Posted April 12, 2015 (edited) I'm told by a pal that is a chemist at the Nanticoke refinery that by the time a tank of regular gas in the car is on the bottom 1/4 it is already breaking down. unless you are going through a tank or more a week. So that tells me how important it is to treat fuel in the boat. Cheap insurance and peace of mind for me. My neighbour takes my old plugs and puts them in his engine. Edited April 12, 2015 by Old Ironmaker Link to comment Share on other sites More sharing options...
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