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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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Have a Tohatsu 2003 70 hp 2 stroke, mis-firing

Customer Question

Hi have a Tohatsu 2003 70 hp 2 stroke, mis-firing intermittently on the top cylinder. I have swapped out spark plugs, injectors, and ignition coils from the adjacent cylinder, and the top cylinder mis-fire persists.
Any suggestions for further checking you may have would be appreciated.
Submitted: 1 year ago.
Category: Boat
Customer: replied 1 year ago.
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Expert:  Charles replied 1 year ago.
Hello Todd, my name is***** will assist you.When you removed the plug from the top cylinder, how did the ceramic on it look? Black, white, tan?Did you swap both the fuel and the air injectors?Do you know any history on the engine?

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