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My outboard is an evinrude 25 hp model 25904R serial A350120 it has got an oil leak on the gear casing on opposite side to filler screws in rear top corner

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This sounds like normal "unburnt" fuel oil mix draining of the inner surface of the exhaust.It usually comes right out of the exhaust by the propeller.

You can check the lower for water contamination by removing the lower drain plug (and only) and see what comes out. If it looks like milky stuff, you are due for a re-seal job.

If still in doubt, you can have a mechanic with a pressure tester put 15# (and only) to it and see if it bleeds down.

Posted on May 26, 2011

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Posted on Jan 02, 2017

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What year is a evinrude outboard with serial number 1451821


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WHAT YEAR IS THAT OLD EVINRUDE? FIND OUT HERE ON OUR MODEL YEAR LOOKUP CHART! evinrude outboard with serial number Google Search

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How do you change the gear lube in a Evinrude Triumph 70 hp outboard motor?


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