1988 9.9 mariner ignition problem

xntric1

Recruit
Joined
Aug 19, 2011
Messages
5
I just recently picked up this motor cheap thinking I got a great deal....maybe not so great after all. The motor runs good...occasionally. I seem to be losing spark on one of the cylinders ( consistently the same cylinder). I've changed the plugs and replaced the coil ( the cheapest parts to change) and now that I know I'm running into a larger chunk of change, would like to have a little certainty about what the problem is. Whether at idle, wide open or anywhere in-between, the "problem cylinder" will cut right out completely for several minutes (or more) and then kick back in again. Any help from anyone is really much appreciated.

Thanks

p.s. I'm CERTAIN that it is not a fuel problem
 
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