25 hp johnson

[dekere]

" I have a 1975 model 25 hp jo

" I have a 1975 model 25 hp johnson, i have rebuilt the carb, set the points, changed the plugs, replaced the fuel, but it sill is not working correctly. it will run smooth for a couple of seconds, and then pow, then run smooth again, then kapow, it does this at slow and fast speeds in the barrel. "

 

[tommyg]

Hey Dekere...
I had the same

Hey Dekere...
I had the same "problem" with my engine...First thing...Make sure that the throttle plate is closing all the way..and then the low speed mixture screw...should be backed out 1 and 1/2 turns from the seat..after the engine warms up continue to back out until the engine runs smoothly....TommyG

 

[Corey]

I also had a similar problem-

I also had a similar problem------head gasket fixed it!