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Sierra 18-5791 Switch Box Assembly for Mercury/Mariner Outboard Motors

Manufacturer

Picture for manufacturer Sierra

Part Number

18-5791
12 reviews
Sale Price

$358.31

1 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-5791 is a premium aftermarket switch box assembly designed specifically for Mercury and Mariner outboard motors. This critical ignition component controls the spark timing and ensures reliable engine performance across all operating conditions.

Key Features:

  • Direct replacement for Mercury Marine part number 19052A8
  • Engineered to meet or exceed OEM specifications for reliable performance
  • Controls ignition timing and spark distribution for smooth engine operation
  • Durable construction designed to withstand harsh marine environments
  • Precision-manufactured for proper fit and function

Switch box assemblies are essential components in the ignition system, converting low-voltage signals from the stator into high-voltage pulses that trigger the ignition coils. This Sierra replacement unit provides dependable ignition control for your Mercury or Mariner outboard, ensuring consistent starts and optimal engine performance.

Products specifications

Type

Ignitions

Overall great experience, I ordered on Sunday and got the package on Wednesday!!!

Easy so far

Great pricing and quick shipping. GREAT

Searching and product listings could be a bit easier to follow along with and cleaner. That is my only complaint.

So far so good, first ever order with Autoplicity.

Autoplicity has been quick to send updates on my order to my email.

easy checkout and part in stock at the lowest price

Fast and friendly

Items were easy to find BUT the pictures for MOOG sway bar link were of Tie Rods. So confusing I had to call Tech support for clarification of my ordered parts.

Is been a great experience, just hope nothing goes wrong when I receive my part

Your website is a little clunky, but your prices are worth it :D The parts showed up on time and well packaged. I was a little freaked because I googled Autoplicity after I placed my order and saw some bad reviews online. My experience was fantastic. Keep

The listing seemed clear and informative. So far so good ;)

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