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Old 08-18-2007, 10:41 AM
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Default What broke? Any ideas?

Looks like something is wrong w/ one of my outdrives.
Was about to run a poker run, opened to motor hatch while idling in gear and heard knocking. Troubleshooting - found out it is not the motor.
One of my drives knocks in forward. Put in neutral or reverse - it sounds fine. Back into fwd and the knocking occurs. The drive works; I ran back home 10 miles or so on plane 3500. After coming off plane - knocking was same - no worse.

What is the likely cause?
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Old 08-18-2007, 03:27 PM
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Check drive oil for contaminants. If lube is clean then you may have prop slap which is not a detrimental issue. Upgrade to a flo-torque type hub design. Not applicable to SSM'S if thats what your spinning.

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Old 08-18-2007, 05:38 PM
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What drives?
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Old 08-19-2007, 09:09 AM
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It is not the props.
Bravo XR's.
I'm thinking I chipped a tooth. . .
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Old 08-19-2007, 09:27 AM
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Originally Posted by BillR
It is not the props.
Bravo XR's.
I'm thinking I chipped a tooth. . .

Thats what it sounds like.Pull the top cap and see whats going on.
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Old 08-19-2007, 04:08 PM
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Pulled top cap - metal chips everywhere. Didn't dig any further.
Looks like front seal behind U-joint let go too. Leaks oil from there.
Off to get fixed . . . . . . .
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Old 08-20-2007, 08:46 AM
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Bill, just curious as to what kind of power you're running in front of those XR's and how many hours you have on the drives? Thanks
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Old 08-20-2007, 09:39 AM
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I think he has 575's ??
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Old 08-20-2007, 03:13 PM
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Just went through this. Took a tooth clean off a gear in the upper and heard the ticking. Not too much for fragments in the oil, but broken piece did make it into the lower gears and put a mark in them.
New gears and bearings.
Quiet mufflers saved me from grenading the whole unit.
XR behind 950 hp. Lived 35 hrs. RIP!
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Old 08-21-2007, 07:24 AM
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Kaama,

575SCi's that have 628 HP.
The upper part of drive has maybe 150-200 hours. The hours on the lowers is unknown.
Dropped the drive off w/ Excursion and he'll check them tonight.
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