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Dominick
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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Yamaha 90 4 stroke burns on plug 1 and lean on plugs 2-3 and

Customer Question

Yamaha 90 4 stroke burns rich on plug 1 and lean on plugs 2-3 and 4 Bake fires at 1/2 throttle I have just calebrated the carbs and the carbs were cleaned by another guy. Any suggestions ?
Submitted: 9 months ago.
Category: Boat
Expert:  Jason replied 9 months ago.

Hi Bernie, my name is Jason.

Have you run a compression test on the engine yet?

How did you calibrate the carbs specifically, what tool was used and how was it done?

Expert:  Jason replied 9 months ago.

Are you still with me Bernie?

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