Ignitions and Electrical› Ignition Components

SIERRAMARINE

TRIGGER, MERCURY

$162.08

SKU: S08C 18-99408

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

Moderate — 2–4 hours

Description

The Sierra Mercury Trigger is a 4-cylinder ignition timer base designed as a replacement for various Mercury/Mariner outboard engines. It is compatible with 80 JET, 100 HP, 115 HP, and 125 HP models. This part replaces Mercury part numbers 99021A2, 99021A6, and 99021K2.

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.

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Specifications

BrandSIERRAMARINE
Part NumberS08C 18-99408

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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