1954 Johnson 5.5

[Johnrude122]

JUst rebuilt this motor and it runs fairly well for an old motor. Have heard people talkin about decarbing engines. I noticed lots of carbon when rebuilding it but just scraped off what i could. Should I decarb it and what should i use and how should i do it.


thanks

 

[tashasdaddy]

Re: 1954 Johnson 5.5

Decarb, take a can of seafoam put 3/4 of it in the gas tank, with only 1 gallon of premixed gas. put the rest in a spray bottle. start the engine, and let it come up to temperature. then remove plugs, and them some real good shot 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. then 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 compression.recheck