Ignitions and Electrical› Charging Systems

SIERRAMARINE

ALTERNATOR

$347.70

SKU: S08C 18-6847

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

Moderate — 2–4 hours

Description

The Sierra 18-6847 is a brand new replacement marine alternator designed to meet or exceed OEM specifications for voltage and amperage output. It features a corrosion-resistant design, including plated fans, pulleys, and hardware, and incorporates special marine flame arrestor screens to prevent sparks. Wiring harnesses are supplied as required for ease of installation, and it is backed by the Sierra warranty.

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

BrandSIERRAMARINE
Part NumberS08C 18-6847

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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