Drivetrain› Differentials and Rear-End Components

Engineered Marine Products

UPPER GEAR SET

$271.30

SKU: E051 43-13065

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Upper Gear Set for MerCruiser 2.5-3.0L, 4-cyl, 1.98 gear ratio, s/n 0K999999 and below. OEM: Mercury Replaces: Mercury 55778A3 | 55766A3 | 55766A2. For 1970-97 MC-1, R/MR/Alpha One & Alpha Gen 2.5-3.0L, 4-cyl, 1.98 gear ratio, s/n 0K999999 and below. also crosses with: Sierra: 18-2205 GLM: 11240 UPC: 840080403618

Fitment

Fitment Guaranteed

Don’t gamble
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.

Available on iOS & Android

Specifications

BrandEngineered Marine Products
Part NumberE051 43-13065

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.

View Full Return Policy