Engines and Components› Oiling Systems

SIERRAMARINE

Impeller Kit

$39.92

SKU: S08C 18-3104-1

In Stock
In Stock
Ships by Aug 30
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Sierra 18-3104-1 is a rubber impeller designed for Johnson/Evinrude outboard applications. It includes a key for installation. This part is interchangeable with various other manufacturers' part numbers, including GLM, Johnson/Evinrude Outboard, and Mallory.
Show original supplier description
The Sierra 18-3104-1 impeller is a direct replacement part crafted from durable rubber, engineered for reliable use in Johnson/Evinrude outboard engines. Each Sierra product is manufactured to meet or exceed the original equipment part it replaces, ensuring quality and performance. This impeller is also interchangeable with several other manufacturer part numbers, including GLM 89790, Johnson/Evinrude Outboard 432941, 437059, 765350, and Mallory 9-45204, 9-45204-10, 9-45211, offering flexibility in sourcing. This impeller is suitable for use in 4-stroke engines and operates electrically. It is also listed as being included in Sierra Water Pump Kits 18-3394 and 18-3454. Please be aware that this product may contain chemicals known to the state of California to cause cancer or reproductive harm, as detailed on www.P65Warnings.ca.gov.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSIERRAMARINE
Part NumberS08C 18-3104-1
CategoryEngines and Components

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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