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Thread: Optimax OB RPM running low

  1. #1
    Member Yukoner's Avatar
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    Default Optimax OB RPM running low

    I had the boat out yesterday, first time out this year.
    Put some new gas in, but mostly last years gas (had been stored with fuel stabilizer), put some Merc Quickleen in.
    2011 150 Optimax with jet pump.
    Started great, bit of smoke on start up from fogging spray in cylinders.
    Ran great, but I'm only pulling 4800 RPM max. Last fall, and all summer, my max was a hair over 5000.
    Any ideas on why it might be running low?
    Would the old fuel be a likely culprit? They are original plugs, but I only have maybe 25 hours on.
    Never wrestle with a pig.
    you both get dirty;
    the Pig likes it.

  2. #2
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    palmer
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    Default

    Maybe a fouled plug from the fogging.
    Did you change out fuel filters ?

  3. #3
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    Change yourplugs after fogging. Run off the old plugs until smoking stops and then changeto fresh plugs
    .

  4. #4
    Member Yukoner's Avatar
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    Default

    Thanks gents.
    Never wrestle with a pig.
    you both get dirty;
    the Pig likes it.

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