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Yanaha 110 slows after a thump

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  • Yanaha 110 slows after a thump

    I have a Yamaha 110hp four stroke I had a problem with the engine slowing to a crawl after throttling back and slamming when you open the throttle again only slow speed is available. Finally I took it to a dealer and he found the fuel pump to be faulty this he changed and gave it a full 500 hr service, changed all the fuel filters, new timing belt also serviced the injectors. All went fine for about 6 hrs running then Saturday in some rough weather it happened again, she slows down and would not give full power after pulling back from a big swell. Has anyone had this experience? We have checked the tank and fuel lines.

  • #2
    have you thought about monitoring fuel pressures to see what is going on?

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