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Guest fishintbay

motor troubleshooting

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Guest fishintbay

i have a 1990 70 hp evenrude it boggs down at 3900 rpm , it doesnt happepen all the time only 3 out 15 times i use it . and if i let it sit with the motore off for 10 mins i can start it up i it will work perfect compression is excellent spark plugs are clean any help would be great .thanks

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rceme74

Good place to start checking, Check the ignition packs for blisters and small cracks on the back side. The sealing agent will start breaking down after a few years, and moisture will start to seep into the components. If its minor cracking a blow dryer will evaporate the accumulated moisture, but if there is blistering, it time to replace them. .  

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