1987 45hp mariner

twhawkman

Recruit
Joined
Aug 5, 2003
Messages
2
16 YEARS OF TROUBLE FREE USE AND I MEAN TROUBLE FREE BUT NOW THERE ARE PROBLEMS. IT STARTED AND IDLED FINE BUT WOULD NOT RUN AT FULL THROTTLE. I CHANGED PLUGS, HAD THE COMPRESSION CHECKED AND HAD THE CARBS CLEANED AND USED FRESH GAS. THINGS WERE FINE FOR THE NEXT ~5 TIMES OUT THEN IT WAS BACK TO ITS OLD TRICKS BUT EVERY SO OFTEN IT WOULD RUN FINE AT FULL THROTTLE. I HAD IT CHECKED AT A MARINA WHILE OUT FISHING AND HE DETERMINED THAT THE TOP COIL WAS BAD, I CHANGED IT BUT NO IMPROVEMENT, IT STILL ACTED THE SAME. WHEN IT'S NOT GOING TO RUN IT WILL NOT IDLE BUT IF IT IDLES WHEN I START IT I KNOW IT WILL WORK. IS THERE A HIGH SPEED JET? COULD IT BE PLUGGED? WHEN HE WAS TESTING IT HAD USED A TESTER LIGHT AND WHEN HE JUMPERED OVER THE TOP COIL TO THE POWER PACK? IT IDLED FINE.
 

Trapbum

Recruit
Joined
Jun 29, 2009
Messages
2
Re: 1987 45hp mariner

I had that problem twice and both times it was a coil. Does not mean that it will be for you but that was my experience with identical motor.
Trapbum
 
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