Loss of Power on XR500 G25

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  • Mahnal
    • Apr 2019
    • 92

    • Bowling Green, KY

    • 2014 SAN G25 - 550

    Loss of Power on XR500 G25

    2014 G25, 475 hours.

    Forgot to put gas stabilizer in over the winter.
    Got the boat out a few weeks ago, and it ran rough, so I added fresh gas in. This worked in the past... but it didn't help.

    Replaced the fuel filter and fcc, drained all the gas, put fresh gas in, put some fuel system cleaner in, ran about 20 gallons through

    Engine is running slightly smoother, still low power. Top speed of 32-34 WOT, when normal top speed is 40.

    Not sure where to go with the diagnostic, and the forum is always full of good ideas...
    1) Spark plugs, a little expensive, but at 500 hours I think it is expected.
    2) Injectors? Probably very expensive,
    3) Keep running an injector cleaner additive to the gas? Suggested additive?
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