Reply To: Your thoughts on SeaFoam additive

[Don]

Well, I’m sure it helps in mild carbon conditions, might help free up lightly stuck rings. But, the way some guys use the stuff, and the claims I’ve heard are way over the top.
You have to be careful using it all the time if you are adding it to the fuel tank, especially on a larger outboard. Depending on the capacity of your fuel tank, this stuff can dilute the fuel to the point of creat a possible lean condition at high RPM. But, I suppose some claim it is some sort of high octane racing fuel as well.