Description

Sierra’s 18-3557 Thermostat is designed for use with MCM GM in-line 6 cylinder engines, providing a dependable replacement option for maintaining proper marine engine operating temperature. It is interchangeable with Chrysler/Force/US Marine F335068, GLM 13080, Johnson/Evinrude 382385 and 396987, Mallory 9-43024, Mercruiser Stern Drive 47594, and Volvo Penta 21148403, offering broad compatibility across multiple marine applications. With a temperature rating of 143°F, this thermostat helps support consistent cooling system performance and stable engine operation. Each Sierra product is manufactured to meet or exceed original equipment specifications for reliable fit and function.

Features

Compatible with MCM GM in-line 6 cylinder marine engines for reliable replacement use
Interchangeable with Chrysler, Force, US Marine, GLM, Johnson/Evinrude, Mallory, Mercruiser, and Volvo Penta parts
143°F temperature rating supports consistent engine cooling and operating stability
Built to meet or exceed original equipment specifications for dependable performance
Suitable for a wide range of marine cooling system applications and configurations
Temperature Rating: 143°F (62° C)
Fits: MCM GM in-line 6 cyl.
Premium quality for longer life
Meets or exceeds manufacturer specs
Backed by Sierra’s limited lifetime warranty