SIERRA 18-4233 Thrust Washer Merc #73345A1

Sierra Marine engine parts are designed to meet or exceed the performance of the OEM part they are intended to replace—and are backed by one of the best warranties in the marine aftermarket parts industry.

Our selection of Sierra engine parts includes replacement parts for most engine applications on the water today—including MerCruiser, OMC, Johnson/Evinrude, Chrysler/Force, Volvo and more.

Find the right part for your application.

For help in selecting the correct part for your engine application, please visit the Sierra Engine Parts Selector, where you can search by OEM part number, Sierra part number, Brand, Engine model, Year, Horsepower, or Serial number.

Purchase with confidence!

The Sierra engine parts we sell are backed by Sierra’s Limited Customer Satisfaction Warranty—one of the best in the business. Sierra warranties their engine parts to be free of defects in workmanship and materials for the useful life of the product. Subject to limitations, if a Sierra product fails to comply with the Warranty, Sierra will repair or replace the defective product free of charge.