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Bravo 3 Oil Leak 1997 origin?

Old 06-01-2020, 08:24 AM
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Default Bravo 3 Oil Leak 1997 origin?

So when I fill it with one quart of drive oil, no leak. When I get to about a quart and a half then it starts to drip out of the prop hub. So thinking it is Not a prop shaft seal as that would leak all the way to empty. So where would it be leaking that is higher up? There is no oil coming out of the shift linkage area. None coming out of the water passage/pickup holes or anywhere else. It drips quickly out of the exhaust/prop hub. It will drip until about half a quart leaks out then it will stop. Then I can drain the remaining quart out of the drain hole. NO leaks at one quart, solid leak at a quart and a half. Any ideas? Thanks. 1997 Bravo 3.

Last edited by Pismo10; 06-01-2020 at 12:50 PM.
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Old 06-01-2020, 08:54 AM
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It was not leaking and now it just started?

Would be the O ring seal
Need a serial number to ensure correct locations

https://www.mercruiserparts.com/bam/...30967/1943/220
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Old 06-01-2020, 12:45 PM
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OK182663 serial #. 1997. Been leaking for a while I think, sure more than I thought tho.
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Old 06-01-2020, 12:52 PM
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Sounds like drop the lower unit is next step and have a look.
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Old 06-01-2020, 01:14 PM
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At 97 1/2 the new housing was introduced but since you've had this one for a while I will agree with Prismo, need to separate the halves and have a look.
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Old 06-02-2020, 05:34 PM
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Leak is in bearing carrier in lower unit where it sticks out aft of the main casing. Corrosion hole thru the side. Anyone ever change one of these? Tough?

part #

865876A01

https://www.mercruiserparts.com/8658...rrier-assy-brg

Threads into main casing.

Exploded view part # 39

https://www.mercruiserparts.com/bam/...30972/1943/250

Thanks for any input.....



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Old 06-02-2020, 05:50 PM
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Sorry but misunderstood where it was leaking.
If its leaking around the outside of the carrier, then probably need a new case

The carrier needs a special tool to remove and it has right hand threads, so it is turn to the right (clockwise) to loosen/remove




Last edited by AllDodge; 06-02-2020 at 05:53 PM.
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Old 06-03-2020, 07:58 AM
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Yes that is the piece that has corroded thru to the point of leaking. It is leaking right thru the side wall of that goldish colored piece about an inch aft of where the exhaust flows in. If I can get it loose, is it difficult to change or can a new one just be threaded in? Any sims/adjustments needed? Thanks
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Old 06-03-2020, 10:21 AM
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Originally Posted by Pismo10 View Post
Yes that is the piece that has corroded thru to the point of leaking. It is leaking right thru the side wall of that goldish colored piece about an inch aft of where the exhaust flows in. If I can get it loose, is it difficult to change or can a new one just be threaded in? Any sims/adjustments needed? Thanks
Its easy to replace, remove one and install a new one. Will need to replace seal with it. Its torqured to 150 ft lb

the new type seal
1 each Large outer seal 26-861694 (replaces 2 each lip seals)
Dimensions 3 - 3/8 OD, 2 - 1/2 ID, 13/16 wide

Need tool 91-805374



Last edited by AllDodge; 06-03-2020 at 10:25 AM.
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