Towing Equipment› Hitches

SIERRAMARINE

THRUST WASHER

$44.72

SKU: S08C 18-4233

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Sierra 18-4233 is a Mercury propeller thrust washer designed to meet OEM specifications. It fits Mercury 40-60 standard gearcase engines and is intended for use with rubber props only. This thrust washer is interchangeable with various Mercury Marine part numbers, including 73345A1, 12-92647M, and 73345, as well as Chrysler/Force/US Marine part number 73345A1 and GLM part number 21290.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandSIERRAMARINE
Part NumberS08C 18-4233

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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