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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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I have a mercury 75HP that runs rough. It will run smooth

Customer Question

I have a mercury 75HP that runs rough. It will run smooth for a while then it pops back or backfires. I have removed & cleaned the carbs etc. Everything looks good! Good compression, good ignition but am at my wits end trying to figure out why it backfires every now and then??? Can you help me??
Submitted: 4 months ago.
Category: Boat
Expert:  Jason replied 4 months ago.

Hi Danny, my name is Jason.

Is it backfiring at low or high rpm? What is the story on the engine, how long have you owned it for, and how long has it been doing this?

Expert:  Jason replied 3 months ago.

Hi Danny, it looks like you read my reply and logged off. Was this something you still needed help with?

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