Elmer this is something that tends to occur for many of us early and late season anglers. I am sure your dealership did a pressure test on you lower gear case. This is the reason they stated there is nothing wrong with it. The moisture you are seeing in the lube is related to the air and water temperature changes, which occur each time you launch and load your rig (condensation). Generally I like to change the gear lube 2 to 3 times through out he season for this reason. By following this procedure you will almost eliminate any gear case failure do to water intrusion as well as normal wear. Please use the proper lube for your engine. I recommend the use of Mercury Marine’s high performance blend on all horsepower ranges to insure protection of your investment.
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