Engine popping..
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Engine popping..

  1. #1
    About 500' AGL MudPumper's Avatar
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    Default Engine popping..

    Stock Marine Power 454 in a 21' Jet. Engine runs and sounds great through all RPM's except between about 2800 to 3200 it sounds like a popping coming from the right bank. After pulling out of the water, the transom had more exhaust soot on the right side than the left which is the side it sounds like the popping is coming from. Any ideas? I'm thinking something wrong in the distributor.

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  3. #2
    New here Beer:30's Avatar
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    If it IS side specific, it could only really be spark plug(s), plug wire(s) on that side - as far as tune up items go.

    On a worse scale, it could be valves or valve springs on that side. That should be more constant though, all rpm.

    Sounds like it is time for tune up. Cap, rotor, points (if not HEI), wires and plugs.
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  4. #3
    steelcomp was here
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    Start with the basics and work up from there through a process of elimination, but don't "eliminate" something unless you're 100% sure. If you find something questionable, see it through before you move on. This helps eliminate confusion and redundancy.
    If God is your co-pilot, change seats!
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  6. #4
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    i would pull plugs on that side then ck lash on that bank may be a rocker that backing off or the cam may have a lobe going away? bbc curse...... good luck

  7. #5
    No Sandbar To Far sanger rat's Avatar
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    Retorque the intake.
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  8. #6
    I'm famous ! Lucky's Avatar
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    Look at the simpe shit first - tune up , wires , cap , rotor - garbage can it if it says Msd on it kidding . check connections , volts, Chips -- volts - did i say volts lol .. What carb ? check power valve and acc. pump - could be a lean pop ?
    " my carbon footprint is gonna kick your green ass"


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  9. #7
    Senior Member Futs's Avatar
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    Don't run it in that RPM range.... Tunem up time. Spray it down and see if you have an intake leak.

  10. #8
    Senior Member Woods 017's Avatar
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    I know its typically not RPM specific but you may want to check the header bolts and gaskets.

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