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hi


You are replying to:
VMS
Posted 6/19/2021 3:22 PM (#980766)
Subject: O.K....I'M stumped!! Johnson 8hp 4 stroke.





Posts: 3472


Location: Elk River, Minnesota
Hiya!!

I'm completely stumped at the moment..... My kicker is not running correctly even while on the muffs...

Had a tough time getting the motor started this year. Rebuilt the carb, checked and cleaned the fuel pump, and got it going...but would not run well. Took it out and it would not come up to power, although it idled just fine.

Usually an issue like this is carb related, so I bought a rebuild kit, rebuilt the carb again....tested on muffs...same issue (will not come up to high speed like it should...only to probably about half the rpm it is supposed to and sputtered)

Replaced the plugs....no change.

Cleaned the breather system (had oil in it) no change.

Checked compression on both cylinders: 92 and 95, so all is decent there...

I'm not sure where to go from here. I don't believe this engine has the ability to be timed using a timing light, so I am completely stumped as to what else this could be.

The only other thing I can think of is a coil going bad. So...question on that....is there a way to test it? Usually when a coil goes bad, the motor will not run as it can only fire on one cylinder... Motor idles just fine...just wont come up to speed.

Any other thoughts or suggestions? Figured I'd post it here to see if anyone has had an issue such as this before with a 4 stroke engine.

Thanks everyone!!

Steve

Edited by VMS 6/19/2021 3:27 PM

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