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Noel Schembri
Noel Schembri, Marine Technician
Category: Boat
Satisfied Customers: 1937
Experience:  Advanced technical diploma
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My Yamaha F115 has lost some power in the high end. Last year

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My Yamaha F115 has lost some power in the high end. Last year my Yamarin would go up to 35 kt but this year only 28 kt. The motor is running ok in low rpm but sound s rough in high rpm.
Submitted: 4 years ago.
Category: Boat
Expert:  Noel Schembri replied 4 years ago.
Hello my name is XXXXX XXXXX I will assist you. Ok first thing you need to start with are the spark plugs, if the plugs have ever been replaced i suggest you replace them as you may have got one who is fouling. If you need further assistance let me know

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