98 4.3 Mercruiser Miss

[Farmer Paul]

Hope I can get some help with my 4.3 ...I have a 98 Starcraft Islander 2001 with 4.3 Mercruiser ...The Boat has never stayed in water overnight , always stored indoors ..It is a low hour boat..2 year ago it started with an occasional miss / to be more correct it is like the ignition is shut off for just 1 second ...The Engine runs smooth , lots of power ...Just that momentary shutdown ...It might happen once an outing usually when running around 3000 rpm . This year it is doing it randomly but every minute or 2 .

I have checked electrical connections , they look good ...Can it be the ignition coil gone bad or possibly the ICM .

Any help is greatly appreciated !