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 Charles Your Own Question
Charles, Marine Mechanic
Category: Boat
Satisfied Customers: 3861
Experience:  US Navy (Ret) Certified Mercury Marine Tech with over a decade of repair experience.
Type Your Boat Question Here...
Charles is online now
A new question is answered every 9 seconds

Yamaha 225 hpdi It is acting like it has bad fuel and there

Customer Question

Yamaha 225 hpdi It is acting like it has bad fuel and there is no power to get on plane. I have replaced all fuel filters and water seperator Any ideas>
Submitted: 1 year ago.
Category: Boat
Customer: replied 1 year ago.
While it is running the rpms will slow down and speed back up I cant get more than 4000 rpm
Expert:  Charles replied 1 year ago.

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

Leaving all hoses connected, take out the two bolts that hold the 2 pulse pumps to the side of the block, then squeeze your primer bulb and see if you get any fuel out of the back of the pumps. If you do, replace the pumps then test run the engine. If this is not the cause, you will need to have the engine hooked to a scanner to monitor the pressure coming from the high pressure pump.

Related Boat Questions