Re: Water in Upper Unit Gear Oil
What I would do is change the lube in the upper, now run on muffs and see if you are getting water in. This would tell you that water is probably being pumped in via the water pump into the upper. The seals are probably bad. Or you have small cracks in the upper itself. They best way to check for sure is simply to do a pressure check. You can buy a threaded nipple that will screw into the oil drain plug hole. Get a bicycle tire pump with a gauge and pump it up. You can then put the drive in a bucket and look for air bubbles and determine where the leak is.
