1979 70HP Johnson bogged down after using Seafoam...

[Willyclay]

Attaboy!!!

 

[1983 ercoa 21']

Sometimes we don't always get to see what's causing the problem .

the important thing is that it's working now.

good job!

 

[oldboat1]

god love ya marcusknight, but feel a snark coming on. "clean the carbs" means taking the carbs off the engine, actually taking them apart and cleaning them -- point at which most folks put in rebuild kits. Can't politely ask if a guy REALLY cleaned the carbs when he says he did -- as in took them off, took them apart. Actually cleaned them. Maybe need a forum requirement -- swearing-in session on carbs (special clause for multiple carbs on multiple carb motors)....

done with the screed. Glad your motor works -- really. Summer fun ain't over yet.

will be ok now. lemme alone. :smash:

 

[Tim Frank]

Unless there is more that you omitted (like more details on the performance issues that you were trying to solve) , you messed with the fuel system and now have a problem. The first thing I'd be doing is a full diagnostic on ....the fuel system.
If you have dislodged stuff with the SeaFoam, which makes perfect sense, in my experience you are not going to fix the problem with externally applied-sprays.
Worth a try I guess because even a slim chance would really pay off if you got lucky in time saved.

More likely you need to do a total clean on at least carbs 1 & 3...at which point it would be a false economy not to do #2 as well.
If you have nor replaced fuel lines in a few years, that is inexpensive and well worth the $ and time.