Gaskets and Seals O-rings, Grommets and Vacuum Caps

SIERRAMARINE

O-RING (PRICED PER PKG OF 5)

$24.27

SKU: S08C 18-7161-9

In Stock
In Stock
Ships by Jun 18
Free Shipping
Non-Returnable Item

Description

The Sierra 18-7161-9 is a replacement O-ring sold in a package of five. It features an inner diameter of 3.250 inches (82.6mm) and a width of 0.070 inches (1.8mm).

This O-ring is designed for use with Mercruiser and Mercury engines, specifically for applications ranging from 30 to 150 horsepower. It is also interchangeable with several other part numbers, including GLM 80420, Mallory 9-76546, and Mercruiser/Mercury Marine 25-32546.

Fitment

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

Available on iOS & Android

Specifications

BrandSIERRAMARINE
Part NumberS08C 18-7161-9

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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