On Tue, 21 May 2013 02:55:41 -0400, "Eisboch" wrote:



"Rupp0003" wrote in message ...


1989 merc 3.0 starts fine, runs fine for about half an hour at any
speed
or rpm then starts to miss and will eventually stall. Fuel dripping
from
flame arrestor but only once rough running starts. Will sometimes
restart after a few minutes and run ok other times will continue to
run
rough and stall.

Are there any members out there that might have some insight into what
the problem might be?

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Bad coil. (Goes bad when warm .... ok when cold.)

====

Probably right. I had that problem on one of my old 454s. To make
it worse, some genius decided that the coil should be mounted very
near the exhaust manifold.