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Dominick
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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I have a 2013 Mercury 9.9 electric start 4 stroke It won't

Customer Question

Hi I have a 2013 Mercury 9.9 electric start 4 stroke
It won't idle and only runs at about half throttle
It has run quite a few hours with ethanol based additive
Carb has been cleaned and re cleaned and new kit
Seems to be some oil in the intake but doesn't smoke
Head gasket seems to be ok no ranks in head visible
Submitted: 1 year ago.
Category: Boat
Customer: replied 1 year ago.
No water in oil but maybe oil in water
Noticed that oil level is high
Oil was changed a while ago and is high on the dipstick is there a sensor for overfill that would cause this problem
My mechanic is stumped
Expert:  Jason replied 1 year ago.
Hello my name is ***** ***** am I speaking with?Has compression and spark output been checked yet? Does the oil smell like gasoline?

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