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Thread: Lost rpms

  1. #1
    Mike1646's Avatar
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    Lost rpms

    Changed the plugs at 28 hours. Was riding today with 31 hours and running normal, suddenly the engine slowed down to 6900-7000 rpms. Didn't go back up. Any ideas?
    2014 SVHO.


  2. #2
    LugNutLS1's Avatar
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    Pull all your plugs again and look for lose wire/cracked plug. Since this started shortly after plug change the likely suspect is narrowed down. Did you happen to just fuel up?

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    Mike1646's Avatar
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    Yes, 8 gallons of fuel.

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    LugNutLS1's Avatar
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    Possibly bad fuel. I would still check over the plugs, smell oil for gas smell.
    if you drain fuel and try premium at a different station that would be best. At the very least if there isn't much fuel left in tank I would pour some seafoam in it and then fill up with premium from another station. If it is still acting up after doing this then time to start diagnosing randoms.....

  5. #5
    Mike1646's Avatar
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    Lost rpms

    Filled up at that same station with premium fuel 3 days before, I'll check the plugs first. Thanks

  6. #6
    LugNutLS1's Avatar
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    That doesn't mean anything. I always fill my boat at same station and I got 120gallon worth of bad fuel last year in middle of summer. Almost cost me 2 motors worth a good amount of pennies. I drained half each tank, seafoamed remaining, replaced water separators and filters, and topped off tanks with premium from another station near lake instead. Fixed it

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    Mike1646's Avatar
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    I hope is not the fuel, still have 3/4 tank. Will try the plugs, then seafoam and refill and different gas satiation.

  8. #8
    Check all of your hose clamps, intake and exhaust side. Use a 1/4 in wratchet and not a flat head. Make sure they are on nice and tight.

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  10. #9
    Mike1646's Avatar
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    Took out plugs, check clamps and hoses. Everything looks good, engine sounds good, idles good. Seafoam and different fuel next. Could it be the BOV?

  11. #10
    LugNutLS1's Avatar
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    Is the line hooked up and the valve closing while on trailer when stabbing the throttle?

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