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Jan 23rd, 2013
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95 merc 200 EFI gear lube leak question #12840208
07/24/18 05:34 PM
07/24/18 05:34 PM
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tdavis184 Offline OP
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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??

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12843289
07/26/18 11:17 PM
07/26/18 11:17 PM
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Too Fat 2 Fish Online content
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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

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12843552
07/27/18 03:01 AM
07/27/18 03:01 AM
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Brownsboro, Tx
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Dawson Hefner Offline
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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?

Last edited by Dawson Hefner; 07/27/18 03:01 AM.

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Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12845755
07/29/18 11:16 AM
07/29/18 11:16 AM
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Yantis, TX
Gamblinman Offline
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Best way is have it pressure tested before and after repair.

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12847099
07/30/18 05:59 PM
07/30/18 05:59 PM
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tdavis184 Offline OP
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Thanks for the responses. Pressure testing and prop seal replacement is in order this coming weekend.

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12847246
07/30/18 08:35 PM
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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

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12849791
08/01/18 07:10 PM
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tdavis184 Offline OP
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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. ??

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12850166
08/02/18 01:40 AM
08/02/18 01:40 AM
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Yep, that’s the one I replaced. Mine would allow air flow both directions

Re: 95 merc 200 EFI gear lube leak question [Re: tdavis184] #12850600
08/02/18 02:13 PM
08/02/18 02:13 PM
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tdavis184 Offline OP
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Thanks. I ordered one..I appreciate it.

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