My Account
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order

Sierra 18-1977-1 Thermostat Housing for MerCruiser Marine Engines

Manufacturer

Picture for manufacturer Sierra

Part Number

118-1977-1
7 reviews
Sale Price

$68.11

2 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 18-1977-1 is a quality replacement thermostat housing designed for MerCruiser marine engines. This upper thermostat housing is engineered to meet and exceed OEM standards, providing reliable cooling system performance in harsh marine environments.

Key Features:

  • Direct replacement for Mercury Marine OEM part numbers 47441 and 47441A1
  • Constructed from durable materials to withstand marine conditions
  • Compatible with MerCruiser models: 225, GM 260, 228, 898/198, 185R, 898R, 228R, and 2GR I/O engines
  • Designed for use with Sierra 18-1994 lower thermostat housing
  • Meets or exceeds original equipment specifications

Sierra Marine has over 50 years of experience manufacturing aftermarket engine parts for the marine industry, supplying quality replacement components to OEM engine manufacturers and boat builders. This thermostat housing is built to handle today's high horsepower engine demands while maintaining proper cooling system function.

THANKS

A+

Fast and easy. They reference part number to manufacturer.

THe site showed that the shocks were backordered for weeks- but THM got my order out in days- very impressive!

Very best price on the net, actually more than half off. Now lets see if I get my order and how long it takes.

No comment

So far so good!!!

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