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The Mariah Owners Club » Maintenance and Repairs » Mercury MerCruiser

engine just revs when in gear

Mercury MerCruiser

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Old 07-09-2011, 09:20 PM   #1

zzzino1 is currently offline
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Default engine just revs when in gear
My 1999 Shabbah Mercruiser 4.3 V-6, 190 HP went over some low areasa and now just revs when I throttle up in both forward and reverse. There is just enough prop thrust at idle to get up to 2-3MPH. Nothing else asppears to be wrong .

Any ideas? Spun prop maybe?
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    • Old 07-11-2011, 02:37 AM   #2

    IowaWing is currently offline
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    Default Re: engine just revs when in gear
    That would be my guess.
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    Old 07-11-2011, 10:27 PM   #3
     
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    Default Re: engine just revs when in gear
    either spun prop hub or bad engine coupler... I hope for your sake it's the spun prop hub.
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    Old 09-07-2011, 03:20 PM   #4

    Captainmatt87 is currently offline
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    Default Re: engine just revs when in gear
    Same thing happened to me. For me it's the coupler. But the only problem besides the $500 part is how do you pull the 7.4 out of a 252z Mariah?

    Matt
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    Old 09-14-2011, 12:55 AM   #5

    mariah bob is currently offline
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    Default Re: engine just revs when in gear
    spun prop. happened to me. looking at it you cant tell
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