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Miscellaneous Vehicles
Boats and Watercraft
Watercraft Engine Maintenance

What sould the consistancy of lower unit oil in a Mercruiser 150 hp be?


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November 27, 2007 10:59PM

Mercury Premium gear lube is caramel-clear in color. It should be changed every year or 100 hours of use. If it gets old and smelly it should be changed. If you see white streaks you have water leaking in through a bad seal. Mercury High performance Gear lube is blue/green-clear. See more at