My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 118-99531 Metric Thread Adapter for Marine Lower Units

Manufacturer

Picture for manufacturer Sierra

Part Number

118-99531
8 reviews
Sale Price

$12.69

2 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 118-99531 is a metric thread adapter designed for marine lower unit gearcase service applications. This precision-engineered adapter allows compatibility between imperial and metric threaded fittings, facilitating proper gear oil filling and maintenance procedures.

Key Features:

  • Metric thread configuration for specific marine outboard applications
  • Compatible with Sierra quart pumps and lower unit fill systems
  • Manufactured to meet or exceed OEM specifications
  • Corrosion-resistant construction for harsh marine environments
  • Essential tool for proper lower unit lubrication service

Sierra Marine provides premium-quality aftermarket replacement parts engineered for durability and reliable performance in demanding marine conditions. This adapter ensures proper thread engagement and leak-free connections during gearcase maintenance.

Simple checkout

Great web site

Great prices fast shipping highly recommended

Very fast shipping, now looking to purchase the front kit!

Smooth they had my part 1979 280ZX

Great

Fast easy and reasonably priced

Awesome experience, next level customer support.

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