My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 18-99127 Thermostat Gasket for Yamaha Outboard Engines

Manufacturer

Picture for manufacturer Sierra

Part Number

18-99127
8 reviews
Sale Price

$7.13

Out of Stock

Notify me when available
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 18-99127 is a premium replacement thermostat gasket designed specifically for Yamaha outboard engines. This precision-engineered gasket ensures a proper seal between the thermostat housing and engine block, preventing coolant leaks and maintaining optimal engine operating temperature.

Key Features:

  • Direct replacement for Yamaha OEM part number 63P-12414-00-00
  • Manufactured to meet or exceed OEM specifications for fit and performance
  • Heat-resistant material withstands high engine temperatures
  • Precision-cut design ensures proper sealing and easy installation
  • Essential component for thermostat replacement and cooling system maintenance

This gasket is a critical component when servicing your Yamaha outboard's cooling system. Always replace the thermostat gasket when installing a new thermostat to prevent potential leaks and ensure reliable engine performance. Sierra Marine parts are manufactured by a trusted aftermarket supplier known for quality marine replacement components.

Check to ensure part fits my truck. Nice feature

quick and simple

Good I didn't expect my package to arrive as fast as it did. thank you a lot.

Easy to use site, good selection and prices!

I have been looking for rain guards for my car for 6 months now I finally found hem fast and easy check out :)

Lowest prices of what I was looking for and super fast shipping!!

Liked the prices a lot. Disappointed that there was no break in shipping costs when ordering multiple items.

Order was correct and came quicker than I expected, I will definitely use Autoplicity again.

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