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Thread: Sudden decrease in RPMs at cruise

  1. 04-07-2021, 05:30 PM #11
    livemusic
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    Quote Originally Posted by Barnacle Bill View Post
    Never heard of that before. That is very strange.
    It's strange that I get a reading of zero or strange that the two out of six are like that? Sorry for ignorance.
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  2. 04-07-2021, 06:15 PM #12
    cattoon
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    If you have 3 carburetors I’m afraid that it may have been the bottom carburetor has stopped fueling and the rings at minimum are gone. It sounds more like a lean seize to me now. Last engine I had that did that was a Mercury. I hope I’m wrong.
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  3. 04-07-2021, 06:28 PM #13
    livemusic
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    Quote Originally Posted by cattoon View Post
    If you have 3 carburetors I’m afraid that it may have been the bottom carburetor has stopped fueling and the rings at minimum are gone. It sounds more like a lean seize to me now. Last engine I had that did that was a Mercury. I hope I’m wrong.
    Yes, three carburetors.
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  4. 04-09-2021, 05:25 AM #14
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    Mbsbeek
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    What did spark plugs look like in those cylinders?
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  5. 04-11-2021, 05:31 AM #15
    livemusic
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    Quote Originally Posted by Mbsbeek View Post
    What did spark plugs look like in those cylinders?
    I didn't notice anything different from the rest but I don't recall scrutinizing them closely like I wish I would have. Gapless plugs.
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