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

California Residents: WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov