My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 18-3728 Marine Lock Nut for Mercury MerCruiser Stern Drive

Manufacturer

Picture for manufacturer Sierra

Part Number

118-3728
7 reviews
Sale Price

$5.01

1 left at this price

delivery box

Usually delivered within 2 days

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 18-3728 is a high-quality marine lock nut designed to meet OEM specifications for Mercury Marine and MerCruiser stern drive applications. This precision-engineered fastener is built to withstand the harsh marine environment while providing secure, reliable fastening for critical engine components.

Key Features:

  • Constructed to meet or exceed OEM quality standards
  • Direct replacement for Mercury Marine parts 11-863332 and 11-99298
  • Designed specifically for MerCruiser stern drive transom plate applications
  • Thread size: 1/2"-20 for secure fastening
  • Corrosion-resistant construction for marine environments
  • Also compatible with GLM 19350

Sierra Marine is recognized as a market leader in aftermarket marine engine parts, offering comprehensive coverage for all major engine brands. Each Sierra component is manufactured to exacting standards to ensure reliable performance and long service life in demanding marine applications.

It was gr8 and convinced

THM had the correct bearing at a good price and delivery was prompt.

D

pricing is good.

Good pricing

Thx

Had what I needed at a great price

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