Logo
FULL SITE MENU

1997 35hp 3cyl Johnson trouble.

M

Magget

New member
Please help me! It all started with a bad rectifier and I figured that was the only problem so yesterday I unplugged the bad rectifier and it seemed to run fine for maybe 10min then the motor started coughing and shaking like it missfired when I gave it more than 50-60% throttle. The motor seemed to choke and I could use less and less throttle until it would die. It starts right away after that but continues to run bad.

The stator measured within spec and the ignotion coils too. Wires are brand new.

Now it runs just as bad on idle with a slight improvement if I remove the ignition wire from cylinder one. No difference between hot/cold as there seemed to be yesterday. If I give it more gas it chokes.

I tried a different tank/fuel line without any differece.

I've probably forgot half of what I've tried and start to get desperate.
 
Is this motor still running with the oil injection unit in service ??------------Test compression and test for spark on all 3 leads.
 
racerone said:
Is this motor still running with the oil injection unit in service ??------------Test compression and test for spark on all 3 leads.
Click to expand...

It still has the oil injection system running and it seems to work fine. When it runs good I have almost no smoke coming from the exhaust but when it starts to run bad i have a lot of smoke and oil/fuel coming out the exhaust. Does this point to ignition trouble? I'll test all plugs for spark again. Next weekend I'll bring a compression tester.
 
That oil injection unit has been proven to be unreliable.-------------Every dealer that I know has said " take it off and throw it away as far as you can "----But that is your choice.--------The oil injection unit does not have a failsafe mode , so it is your choice.--------Replace the water pump impeller since it may be overheating and going into S.L.O.W. mode.
 
Back
Top