Sierra 18-3550 Thermostat Replaces 59078

Sierra 18-3550 Mercruiser 140 Degree Thermostat

Sierra high-quality engine parts are designed to meet OEM specifications. For use on Mercruiser Stern Drives and Chrysler/Force/US Marine engines.

140 Degree Temperature Rating

Fits Mercruiser 120/2.5L (s/n 2324347 & up) w/ cast iron exhaust manifolds.

Fits Mercruiser 140-3.0L (s/n 0L340999 & below) and 165.

Interchangeable with:

Chrysler/Force/US Marine

F84068-2

F85068-2

F84068-1

F84068

GLM

13020

Mallory

9-43020

Mercruiser Stern Drive

59078B

59078A1

59078