drive oil keeps coming out of oil reservoir by cap when rpm goes over 3000. Got the drive tested today and holds 12 pounds all day long. no water in oil. Merc dealer says 2 options: too much vibration on engine should relocate tank, or change the cap. What do you think is my solution or problem ?

I think I read some others having this problem, I think they fixed it with a billet o-ring cap you can buy. Maybe try trick marine

from exp ( 25 yrs building drives) its a sign that its over heating, most of the time from a bad brearing, get it checked out by someone that knows what they are doing.....


the lube gets hot expands blow out where the weakest point is
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I would like to add that gear lube expands when it gets hot. How much lube is in the bottle when the drive is cold? If you put too much in, it may spill out when hot.

I had a similar problem. Had a cap that leaked , had to buy the whole resevior. Other drive had a bad seal. Boat smelled like gear oil all the time. My friends re-named it the valdez!

If the drive is too hot you may need a drive shower. I can get you one if you need it.. Jamie / lakeside