My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 18-99439 Voltage Regulator for Mercury 4-Cylinder Outboards

Manufacturer

Picture for manufacturer Sierra

Part Number

118-99439
9 reviews
Sale Price

$142.96

1 left at this price

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 18-99439 Voltage Regulator is a premium-quality replacement charging system component designed for 4-cylinder Mercury and Yamaha 4-stroke outboard motors. This voltage regulator ensures consistent electrical system performance by maintaining proper voltage output to keep batteries charged and electrical systems functioning optimally.

Key Features:

  • Designed for 4-cylinder Mercury and Yamaha 4-stroke outboard engines
  • Maintains stable voltage output for reliable battery charging
  • Engineered to meet or exceed OEM specifications
  • Direct replacement for factory voltage regulators
  • Built to withstand harsh marine environments

Sierra is a trusted name in aftermarket marine parts, providing high-quality components that deliver dependable performance and long service life. This voltage regulator is manufactured to OEM standards, ensuring proper fit and reliable operation for your outboard motor's charging system.

Great shopping experience.

Great price; easy ordering and very timely delivery

Part arrived on time. Happy customer

good service,

Easy to order, great price and fast shipping. Great first buying experience.

Competitive pricing & fast delivery

Answers were prompt and helpful

all good on price and ordering

Great parts fast shipping .

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