VERY quick question on adding Sea-Foam to 25hp

[jerdogg1]

Hello everyone. New to this forum. I just bought a boat with an early 90's 25hp Mercury tiller. I had read on this forum about using Sea-Foam to clean the carbs, etc. The can gave directions for how much to use and said use more to clean things out, so I added about 3/4 of a can to 5 gallons of gas/oil mix. I have run the boat twice since doing this, and I'm getting a lot of smoke off the motor, it seems especially at low speeds.

Is this normal? I suspect it's just the motor cleaning itself out, but just wanted to check in with the experts.

Thanks.

 

[MadProps]

Re: VERY quick question on adding Sea-Foam to 25hp

this is normal its NOW burning off the accumulated carbon

next tank should run clean

 

[jeff_smith_0423]

Re: VERY quick question on adding Sea-Foam to 25hp

Burning off all the napatha that is in your gas now, too. Should smoke like a housefire.