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Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3933
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
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I have a 150 hp gh pressure injection 2001 yamaha engine

Customer Question

I have a 150 hp high pressure injection 2001 yamaha engine that is not firing on two cylinders , the cause?
Submitted: 1 year ago.
Category: Boat
Expert:  Charles replied 1 year ago.

Hello, my name is***** will assist you.

If you are testing the spark on the engine while it is at idle, then it is correct, it idles on 4, if you have it in gear and it still does not pick them up, look to the shift switch on the engine as the fault.