This Sierra 18-2001 OMC 330137 0331137 Prop Shaft Lower Oil Seal is a high-quality replacement part for your outboard engine. It is designed with a 1.125" inside diameter (shaft size) and a 1.624" outside diameter, with a width of 0.250". The manufacturer part number for this part is 18-2001 330137 0330137 802299A1, and it is a perfect fit for OMC # 330137.

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