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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 1999 bayliner with a 4.3 merc. It surges at gh rpm.

Customer Question

I have a 1999 bayliner with a 4.3 merc . It surges at high rpm . Runs and starts excellent other than that . What should I be checking . I put a complete new fuel pump and cooler in last fall as it would not even start . It has worked great till just lately .
Submitted: 1 year ago.
Category: Boat
Expert:  Jason replied 1 year ago.

Hi Bill, good morning my name is Jason.

All Mercrusiers are cataloged by serial number can I get that number so I can run it and see exactly which engine you have.

What is the maximum rpms the engine will make under a load?

How old is the fuel?