1983 Johnson 90 V4 problem

canadianwonder

Recruit
Joined
May 22, 2011
Messages
3
Hello. This motor will run fine for days and then at start up will be running rough, missing. Does the cough and spit thing. Will keep running but will not get up on plane. Can come back next day and will run fine. Took to mechanic for quick look, compression ok, spark ok, no water in fuel. Was running fine when I took it to him but not when I pulled it out of water. Any help appreciated...
 
D

DJ

Guest
Re: 1983 Johnson 90 V4 problem

The easist thing to check is spark. By cylinder.

Use an iductive timing light to find out which cylinder(s) is not firing when it acts up.
 
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