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 Joe Your Own Question
Joe, Marine Mechanic
Category: Boat
Satisfied Customers: 7251
Experience:  ASE, electronics, Marine mechanical and electronics, pwc, wiring, all around repair tech,
Type Your Boat Question Here...
Joe is online now
A new question is answered every 9 seconds

2002 496 HO idles fine, runs up to around 3K fine, after that

Customer Question

2002 496 HO idles fine, runs up to around 3K fine, after that under load or higher revs the engine bucks and kicks, and even cuts out as if gas is tricklng in. If I lower revs it runs nd idles fine: clogged boost pump filter or water in gas ??
Submitted: 2 years ago.
Category: Boat
Expert:  Joe replied 2 years ago.


Thank you for allowing me to assist you, my name is ***** ***** I will be happy to assist you with your concern today.

With the symptoms I would start with a fuel pressure test, not just key on engine off, we are talking also running at idle and also during the problem to see if your loosing fuel pressure. In terms of checking for water in fuel simply remove your spin on filter and dump contents into a glass jar allowing time to settle, if there is any water you will see the seperation between the fuel and water, but know that water in the fuel is often present at all rpm's. You would also want to check for misfires, timing, compression. You would also want to go ahead and preform a tune up, plugs, cap, rotor, fuel filter, etc.

If needed with the above info we can continue with diagnosis.

Thank you!

- Joe

Please rate my answer when ready. Bonuses are appreciated.

If for any reason you are not satisfied please reply back to me for further assistance to which I will be glad to help you. The rating system is only to rate me as an expert not the site or the product. If you have any problems for any reason please reply back and let me know.

Thanks again for using justanswer and have a great day!

If you need any further assistance you can reply back at any time for my help.

I'd be happy to answer any other questions you have even if not related.