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#12840208 - 07/24/18 12:34 PM 95 merc 200 EFI gear lube leak question
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 135
Loc: Longview, Tx
Noticed gear oil on skeg. Removed prop to find what appears to be gear oil leaking from around prop shaft seals. Changing those not a problem. Question is....is it common for the gear oil leak to be coming from the o-ring that is on the bearing carrier? I assume a pressure test is the only way to be sure of the leak source??

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#12843289 - 07/26/18 06:17 PM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
Too Fat 2 Fish Online   content
Outdoorsman

Registered: 12/30/16
Posts: 159
Loc: Grapevine
I don’t know but if you ask your question on bass boat central you’ll get an answer from joe54, helped me out with my 94 200

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#12843552 - 07/26/18 10:01 PM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
Dawson Hefner Offline
Extreme Angler

Registered: 09/10/09
Posts: 2954
Loc: Brownsboro, Tx
Pressure test it. Easy to do, and it will let you know for sure the source. You sure it is not unburned 2 stroke oil from exhaust?


Edited by Dawson Hefner (07/26/18 10:01 PM)
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Guided rod and reel fishing trips for Alligator gar on the Trinity River
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#12845755 - 07/29/18 06:16 AM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
Gamblinman Online   content
TFF Team Angler

Registered: 11/26/02
Posts: 3576
Loc: Yantis, TX
Best way is have it pressure tested before and after repair.

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#12847099 - 07/30/18 12:59 PM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 135
Loc: Longview, Tx
Thanks for the responses. Pressure testing and prop seal replacement is in order this coming weekend.

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#12847246 - 07/30/18 03:35 PM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
Too Fat 2 Fish Online   content
Outdoorsman

Registered: 12/30/16
Posts: 159
Loc: Grapevine
Originally Posted By: tdavis184
Thanks for the responses. Pressure testing and prop seal replacement is in order this coming weekend.


Unrelated to your original question but with that motor, replace your oil check valve if you haven't already. Apparently a known problem. I was having all sorts of trouble with my 94 200 efi. New oil check valve fixed it up. Cost $15 and installed in less than 5 minutes

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#12849791 - 08/01/18 02:10 PM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 135
Loc: Longview, Tx
TF2F.....I assume you are talking about the 2psi crankcase check valve that sends pressure to the large remote oil tank thereby forcing oil from the large remote tank to the small tank under the cowling? Or that what I think you are saying. I have not changed it. But from what I read it is a common (and low cost) item that should be changed BEFORE it acts up. ??

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#12850166 - 08/01/18 08:40 PM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
Too Fat 2 Fish Online   content
Outdoorsman

Registered: 12/30/16
Posts: 159
Loc: Grapevine
Yep, that’s the one I replaced. Mine would allow air flow both directions

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#12850600 - 08/02/18 09:13 AM Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184]
tdavis184 Offline
Outdoorsman

Registered: 09/12/06
Posts: 135
Loc: Longview, Tx
Thanks. I ordered one..I appreciate it.

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