How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
Type Your Boat Question Here...
Dominick is online now
A new question is answered every 9 seconds

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?

Related Boat Questions