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Posts: 5
| There are two screws. Usually one screw on the bottom area of the lower unit and another about a foot or so farther up that may say "oil level." If you have a severe leak in the lower unit, clear water may come out the bottom hole by just taking out the bottom screw, providing it's above 32 degrees. Then oil will follow since oil floats on water. However, to properly drain and re-fill the lower unit, you must take out both screws. When the top screw is out it allows the oil to get the air it needs to drain properly. Most of us change the oil in the lower units every year. If you don't see clear water but the oil is discolored, you still have water mixing with the oil, and you should have a mechanic check your seals, etc. After you drain a lower unit, you fill from the bottom screw hole until oil comes out the top screw hole, then put the top screw in first to create a vacuum to hold the oil there until you can get the bottom screw in.
Edited by campfire 11/29/2006 8:15 AM
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