Reply To: ‘79 Johnson 25 hp

[Geer Pyron]

Okay, home from work and checking things out. First, make sure blue snappy spark jumps 3/8”.
Next, check reeds. I hope just looking through intake with a good light is sufficient. Should I gingerly push on each leaf with a long q-tip to make sure it isn’t stuck?
And wow, the carb does indeed spit back!
The plug in the air box was off and I could feel it on my arm as I ran it.
Then make sure carb is synchronized with mag. Then re-do economizer link.
As far as economizer link goes, I did notice that at full fast position of tiller grip both spark and throttle are at full open or maxed out. If I twist grip a little towards slow, both mag plate and throttle move, simultaneously.
This is unlike my ‘58 where there is a point at which mag is fully advanced and then a little more twist to fast and throttle is WO. Then when twisted towards slow, throttle closes a little first, then mag moves.
I’ll look into the operation of the later model economizers.
Then what?
Those things are easy.
Maybe recheck the carb for debris. Oh yea, I read that the fat doughnut gasket, with the clover leaf hole that goes on the tube inside DOES effect high speed performance. Contrary to what I’ve been told.
I’ll replace that to be safe.
All that done, if the problem persists?
Slap a new power pack on and hope?
Is there any credence in the idea that water may be entering the lower cylinder via a bad gasket thus preventing that cylinder from working as it should?
I read another forum thread that dealt with the same problem I’m having. Turned out to be a bad wire. It worked most of the time (at idle) but then would ground out or something when throttled up.
All my wires are good.
Thanks again for the help.
G

JMGP