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*Minimum order of $299 to use Sezzle
The lower unit is the portion of the engine that is lower than the exhaust housing. It houses the drive shaft, propeller shaft, water pump, and gears. Replacing the lower unit is part of the process of replacing the impeller on your water pump, exchanging a drive shaft of one length for another, or replacing the oil seals on drive or propeller shafts. The lower unit (or gearcase) is the part of the outboard that transfers engine power and rotation to the prop shaft and propeller.
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