www.iFourWinns.com

Recently had the impeller changed. Since the change there is a slight leak in drive oil. No leaking seals, oil res. in engine bay shows leaking of an ounce or 2 per hour of running. Repair guy feels that is being sucked thru the exhaust, but leak not stopped yet. Anyone ever have this issue? 2007 260H, 496 B3.

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Rdbrill
2007 260H 496/BIII

It would appear to me that this is a fairly serious problem. If the oil is going out there'a good chance that water is getting in. I would have the drive serviced and pressure tested. I think you'll find a seal is leaking by.

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Marc, Kathlin & Nathalie


'89 Chaparral Laser 32

'93 Vista 245, 5.8L w/ King Cobra

Former Boats
'01 H260, 7.4 VP Duoprop
'98 H200, 5.0 GL w/VP SX drive

I thought the B3 drive had the impeller on the engine, not in the outdrive ? If so, then the impeller change had nothing to do with the outdrive oil leak/ consumption. I vaguely remember oil leaks being mentioned before for the B1 and B3, I can't understand how the drive oil could possibly end up being sucked up by the exhaust. The pressure test mentioned by MNG would seem a sensible next step.

Graham

Yes, There is a merc service bulletin out (10-64) Letting us know they now have a new inner prop shaft seal to help with this case by case problem.

While pressure testing don't forget to turn the prop shafts.

Agreed that a B3 impeller change has nothing to do with a gear lube leak. This seems like a coincidence to me.

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Paul
2007 Four Winns Horizon 220
Mercruiser 350 Mag MPI w/ Bravo III Drive
2004 Ford Explorer Limited (V8-AWD)
Pomme de Terre Lake (Southwest Missouri)

Is there a link available for service bulletin 10-64? A quick web search did not turn it up.

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Jeff
2006 H240 6.2 MX 320HP B3
La Habra, California

Sorry Jeff, I don't have a link to send you.

But maybe a mercruiser dealer might be able to print you a copy of the service bulletin, That is if you can get a chance to ask them for one.

Good luck.