My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 118-5743-1 Mercury Mariner Outboard Voltage Regulator

Manufacturer

Picture for manufacturer Sierra

Part Number

118-5743-1
7 reviews
Sale Price

$149.00

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-5743-1 Voltage Regulator is a premium aftermarket replacement designed for Mercury and Mariner outboard motors equipped with 16-amp or 40-amp charging systems. Engineered to meet or exceed original equipment specifications, this regulator is a reliable, direct-fit solution for maintaining proper electrical output and protecting your onboard electronics.

Key Features:

  • Compatible with Mercury and Mariner outboard engines with 16-amp or 40-amp charging systems
  • Fits model years 1992 to present
  • Meets or exceeds OEM performance standards
  • Built to withstand the harsh marine environment
  • Note: Black wire connects to engine ground

Replaces These OEM & Aftermarket Part Numbers:

  • Mercury/Mariner: 815279-3, 815279-5, 815279T, 830179T, 8301792, 854515, 854515T1, 856748, 883072T, 8M0084173
  • CDI: 194-5279
  • Mallory: 9-17101

Sierra is a leading supplier of aftermarket marine engine and drive parts, trusted by OEM engine manufacturers and boat builders alike. The Sierra 18-5743-1 voltage regulator delivers the consistent charging performance your Mercury or Mariner outboard demands.

Quick easy checkout

Incredibly easy to find the part and price is great.

Great Transaction!!! Thanks

Easily found what I was looking for.

Easy ordering...clear reading website

easy site to navigate

Needed a diesel fuel cap. Ordered it on a Saturday and received it the following Monday.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy