Decarb

joeyd50

Petty Officer 2nd Class
Joined
Jul 12, 2005
Messages
158
I know this has been posted before, I seen it, I just can't find it again. I want to decarb my 1975 85HP Johnson.
Thanks
Joe
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: Decarb

This is from the FAQ....

http://forums.iboats.com/showthread.php?t=158076

This is Tashasdaddys technique, which works well....

Take a can of seafoam, put 3/4 of it in the gas tank, with only 1 gallon of premixed gas. Now put the rest of it in a spray bottle. Start the engine, and let it come up to temperature. Then remove the plugs, and spray some real good shots of seafoam into the cylinders, replace plugs, let sit 15 minutes. Restart, and spray the rest of the seafoam into the carbs, so the the motor almost stalls, wait and repeat until the seafoam is gone. Then take for a wide open spin. Now put in new plugs, ad premixed gas to the tank, and take it for a wide open throttle spin. It is going to smoke like a house on fire, during this process.

Afterwards recheck you compression.
 
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