Merc outboard wont gain RPM's.

smalldog · 03-25-2008, 01:53 AM

1987 50 hp. Just back from getting a tune up. Ran fine.
Took it out the other day and it wont gain RPM's. Full throttle feels like about half throttle. Just plows. Wont get up on a plane.
Used to have oil injection and took it off due to inability to get parts for it. Just mix my oil now. Thinking I have a clogged fuel line on the motor or a pump going out.

dixiefisher · 03-25-2008, 05:42 AM

I had this happen to me a year ago on my '87 90hp....it ended up being one of the ignition coils....there is a magnet that wraps around the coil that had broken into pieces....you can quickly test it by using a spark tester.....no fire...or a weak fire...
Did you remove the oil injection after the tune up?....