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Mercury Mariner Outboards: Gearcase Rebuild & Repair Help

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Mercury Mariner Forum Topic: Gearcase Seals

Replies Thread
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Application Guides & Charts

Quicksilver: Mercury Mariner Outboard
Sierra Marine: Mercury Mariner Outboard

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Electrical System

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Lower Unit

Recoil Starter

CDI Electronics: Mercury Mariner Outboard

Mercury Mariner Forum Topics

Lower Unit Gearcase Seal Kit for Mercury Mariner Outboard

Mercury Mariner lower unit gearcase seal kitSealing the gear oil inside the gearcase, and keeping water from intruding into the gearcase are the two aims of all the shaft seals, o-rings, spaghetti seals and gaskets in a lower unit. When you check your gear oil as a part of regular inspection, if you find the oil to be milky, it means water has been introduced somewhere. A seal kit and fresh gear oil will put you back in the safe zone.



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