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Author Topic:   Seafoam worked for me

meridian posted 10-11-2010 08:59 PM ET (US)
My new to me 1992 Yamaha 150hp 2-stroke has been hard to start the first time each day. It could take a few minutes or more of on-and-off cranking before it would fire up. Last week I gave it a 20 minute Seafoam treatment. (They now have it in a spray can). I was out 3 days last weekend and it started up immediately each day with just a little choke and throttle.
jimh posted 10-12-2010 08:32 AM ET (US)
Please give us more detail on how you applied the Seafoam to the engine. I'd like to know the technique you used. Thanks.
meridian posted 10-14-2010 11:08 AM ET (US)
I started the engine, fogged the carbs for about 30 seconds then shut down. I tilted the engine up, removed the plugs and sprayed more into each cylinder, turned it over by hand a few cycles, reinserted the plugs and let it sit for 15 minutes. After the start-up it smoked profusely for a few more minutes.
Tohsgib posted 10-14-2010 11:23 AM ET (US)
That did NOT clean your carbs. May have cleaned your cylinders, crank, bearings, and plugs but it did not clean your carbs. A chemical mustgo through the carb in order to clean it. All you did was spray it into the throat which force fed it into the engine in the air the engine sucked in to mix with the gas.
contender posted 10-14-2010 01:33 PM ET (US)
Tohsgib is correct, spraying the Seafoam in a carb is like going to a chiropractor instead of an orthopedic surgeon when you have a broken leg. Seafoam does not clean out the carbs, you need to take them apart to do it correctly. Another reason is you should inspect your parts with your eyes to check them out....
weekendwarrior posted 10-14-2010 02:04 PM ET (US)
While the seafoam didn't clean the inner parts of the carb, it is entirely possible that his hard starting was due to sticky rings caused by carbon build up. The seafoam could have cleaned some of that carbon freeing the rings and resolving the hard cold starting.
Tohsgib posted 10-14-2010 03:25 PM ET (US)
Again it most likely cleaned the plugs or maybe an intake port which helped the hard starting issue.
Sal DiMercurio posted 10-14-2010 04:32 PM ET (US)
In order to clean the carbs, you must empty the fuel from your water seperator & fill it with Sea Foam & replace the filter full of SF, than start the engine & allow the Sea Foam be run long enough so it gets into & "THROUGH ", the carbs, than shut her down while she's still running in shock treatment method SF, & let her sit over night.
This method won't rebuild your carbs, but it will generally clean them out enough to make a difference.
I just ran a 1/2 of a full Racor full of SF through my DFI Evinrude 200 hp., & shut her down & allow the SF to sit in the injectors & engine over night, to try & clean my injectors, as she's running kinda rough [ surgeing ] at certain rpms.
Sal
dino54904 posted 10-14-2010 05:28 PM ET (US)
Does anybody know what the MINIMUM time is for SeaFoam to work its magic? Is 15 minutes enough or if you can't let it sit overnight maybe you shouldn't bother? Any thoughts?
meridian posted 10-14-2010 08:31 PM ET (US)
I guess some people read things that aren't there. I never said it cleaned my carbs.
modenacart posted 10-14-2010 09:12 PM ET (US)
Reading is a lost art.
frstevec posted 10-14-2010 10:09 PM ET (US)
Last week on my 1988 Yamaha 115, I emptied the fuel/water separator and replaced gas with Berryman 12. I poured Berryman 12 into the cylinders. I turned over engine and left it overnight. Took a while to start, no smoke! After warming up, it ran great, but I noticed that the primer bulb wouldn't stay firm. The next day, I squeezed and squeezed and I could hear a wheezing sound and got no prime. It would not start. I couldn't tell if the air leak is in hose between the little filter and the fuel pump or the diaphragm of pump. The pump was replaced this summer. I have not gone further but I suspect that the Berryman ate the hose or the diaphragm. I don't know if Seafoam is the same mixture -acetone, etc of berryman but I caution folks on the full strength use of these cleaners.
Tohsgib posted 10-15-2010 12:32 AM ET (US)
You are correct meridian but in another thread where I instructed a reader to have their carbs cleaned you posted that SeaFoam worked for you and to try it...I did not want you to believe that you actually fixed a carb problem.

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Author	Topic: Seafoam worked for me
meridian	posted 10-11-2010 08:59 PM ET (US) My new to me 1992 Yamaha 150hp 2-stroke has been hard to start the first time each day. It could take a few minutes or more of on-and-off cranking before it would fire up. Last week I gave it a 20 minute Seafoam treatment. (They now have it in a spray can). I was out 3 days last weekend and it started up immediately each day with just a little choke and throttle.
jimh	posted 10-12-2010 08:32 AM ET (US) Please give us more detail on how you applied the Seafoam to the engine. I'd like to know the technique you used. Thanks.
meridian	posted 10-14-2010 11:08 AM ET (US) I started the engine, fogged the carbs for about 30 seconds then shut down. I tilted the engine up, removed the plugs and sprayed more into each cylinder, turned it over by hand a few cycles, reinserted the plugs and let it sit for 15 minutes. After the start-up it smoked profusely for a few more minutes.
Tohsgib	posted 10-14-2010 11:23 AM ET (US) That did NOT clean your carbs. May have cleaned your cylinders, crank, bearings, and plugs but it did not clean your carbs. A chemical mustgo through the carb in order to clean it. All you did was spray it into the throat which force fed it into the engine in the air the engine sucked in to mix with the gas.
contender	posted 10-14-2010 01:33 PM ET (US) Tohsgib is correct, spraying the Seafoam in a carb is like going to a chiropractor instead of an orthopedic surgeon when you have a broken leg. Seafoam does not clean out the carbs, you need to take them apart to do it correctly. Another reason is you should inspect your parts with your eyes to check them out....
weekendwarrior	posted 10-14-2010 02:04 PM ET (US) While the seafoam didn't clean the inner parts of the carb, it is entirely possible that his hard starting was due to sticky rings caused by carbon build up. The seafoam could have cleaned some of that carbon freeing the rings and resolving the hard cold starting.
Tohsgib	posted 10-14-2010 03:25 PM ET (US) Again it most likely cleaned the plugs or maybe an intake port which helped the hard starting issue.
Sal DiMercurio	posted 10-14-2010 04:32 PM ET (US) In order to clean the carbs, you must empty the fuel from your water seperator & fill it with Sea Foam & replace the filter full of SF, than start the engine & allow the Sea Foam be run long enough so it gets into & "THROUGH ", the carbs, than shut her down while she's still running in shock treatment method SF, & let her sit over night. This method won't rebuild your carbs, but it will generally clean them out enough to make a difference. I just ran a 1/2 of a full Racor full of SF through my DFI Evinrude 200 hp., & shut her down & allow the SF to sit in the injectors & engine over night, to try & clean my injectors, as she's running kinda rough [ surgeing ] at certain rpms. Sal
dino54904	posted 10-14-2010 05:28 PM ET (US) Does anybody know what the MINIMUM time is for SeaFoam to work its magic? Is 15 minutes enough or if you can't let it sit overnight maybe you shouldn't bother? Any thoughts?
meridian	posted 10-14-2010 08:31 PM ET (US) I guess some people read things that aren't there. I never said it cleaned my carbs.
modenacart	posted 10-14-2010 09:12 PM ET (US) Reading is a lost art.
frstevec	posted 10-14-2010 10:09 PM ET (US) Last week on my 1988 Yamaha 115, I emptied the fuel/water separator and replaced gas with Berryman 12. I poured Berryman 12 into the cylinders. I turned over engine and left it overnight. Took a while to start, no smoke! After warming up, it ran great, but I noticed that the primer bulb wouldn't stay firm. The next day, I squeezed and squeezed and I could hear a wheezing sound and got no prime. It would not start. I couldn't tell if the air leak is in hose between the little filter and the fuel pump or the diaphragm of pump. The pump was replaced this summer. I have not gone further but I suspect that the Berryman ate the hose or the diaphragm. I don't know if Seafoam is the same mixture -acetone, etc of berryman but I caution folks on the full strength use of these cleaners.
Tohsgib	posted 10-15-2010 12:32 AM ET (US) You are correct meridian but in another thread where I instructed a reader to have their carbs cleaned you posted that SeaFoam worked for you and to try it...I did not want you to believe that you actually fixed a carb problem.