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Sierra 18-5139 Marine Ignition Contact Set for Mercury/Mariner Outboard

Manufacturer

Sierra

Picture for manufacturer Sierra

Part Number

18-5139
14 reviews
03/11/2036 4:10 PM
Sale Price

$65.86

In Stock (9)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Sierra 18-5139 is a high-quality marine ignition contact set designed for Mercury and Mariner outboard motors with conventional ignition systems. This precision-engineered contact point set ensures reliable ignition timing and consistent engine performance on the water.

Key Features:

  • Direct replacement for Mercury Marine conventional ignition systems
  • Compatible with 4hp, 4.5hp, 7.5hp, 9.8hp, and 20hp outboard motors
  • Meets or exceeds OEM specifications for quality and reliability
  • Single contact point unit for precise ignition timing

OEM Cross-Reference: Replaces Mercury Marine part numbers 336-4318A2, 336-3948A3, 336-4318A3, 336-4318A4, and 336-3948A2. Note: Two Sierra 18-5139 units equal one Mercury 336-4318A2 assembly.

Sierra Marine parts are manufactured to strict quality standards, providing boat owners with dependable aftermarket components for routine maintenance and tune-ups.

Products specifications

Type

Contact Sets

Ordered some tires on Friday and got them on Monday. How much better shipping time can you get!! Best price I could find too.

Easy

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Been good although I never got a response about the wrong gaskets in my last order.

awesome just what I was looking for

Very good price on a part that is hard to find

Smooth response, I appreciate the follow-up

Easy ordering

quick easy checkout and the cheapest shipping by far

Good

Great prices, clear information and fast shipping!

Easy!

Very intuitive website, great experience so far.

I placed an order and 2 days later it was at my door!!! Very fast shipping and easy to navigate website! I would definitely recommend this site to all my friends. Keep up the great job!

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