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Sierra 18-99403 Trigger Assembly for Mercury Outboard Engines

Manufacturer

Picture for manufacturer Sierra

Part Number

118-99403
5 reviews
Sale Price

$141.14

1 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-99403 is a precision-engineered trigger assembly designed as a direct replacement for Mercury outboard engines. This critical ignition system component works in conjunction with the stator to generate the timing signal that fires the spark plugs at the correct moment in the combustion cycle.

Key Features:

  • Direct replacement for Mercury OEM part number 18-99403
  • Precision-manufactured to meet or exceed OEM specifications
  • Essential component of the electronic ignition system
  • Quality aftermarket replacement from Sierra Marine
  • Designed for reliable performance in harsh marine environments

Sierra Marine is a trusted name in aftermarket marine engine parts, offering quality replacement components for Mercury, Yamaha, and other major outboard manufacturers. This trigger assembly is built to deliver dependable ignition performance and restore proper engine operation.

Best price I could find, good service and prompt delivery. Thanks, it's just what I needed. Steve C

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They met all my expectations, which isn't a simple thing to do. I will visit the site again for future purchases.

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