96 johnson 150 hp sputtering and stalling

Brian Gronquist

Recruit
Joined
May 19, 2010
Messages
2
Having a couple problems with this motor. Had it out yesterday for the first time this year (live in MN) and up to 3000 rpm the engine runs fine, higher than that it sputters and stalls. Cannot get it over 4500 rpm and then it is runnig so rough that it scares me. Also once in a while it will cut out entirely for a fraction of a second and then start again. what this does is to throw everyone in the boat forward and the back as it starts up again. I also found out that everytime i stop for a while I need to re-prime it to keep it running for more than a few seconds. Any ideas as to what could be wrong?
(Had it tuned up last year)

Thanks, Brian
 
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