SIERRA 140°F Thermostat Kit for MerCruiser Inline 4/6-Cylinder Engines – 18-3650

Description

SIERRA 140°F Thermostat Kit for MerCruiser Inline 4/6-Cylinder Engines – 18-3650

The SIERRA 140°F Thermostat Kit for MerCruiser Inline 4/6-Cylinder Engines – 18-3650 is a marine cooling-system replacement component designed for 1998-and-older MerCruiser GM inline 4- and 6-cylinder engines. Its 140°F (60°C) operating rating helps the engine reach and maintain the intended cooling-system temperature. It is a fit-specific service part; confirm the engine model, serial range, cooling configuration, and OEM interchange before installation.

• Designed for 1998-and-older MerCruiser GM inline 4- and 6-cylinder engines
• Thermostat temperature rating: 140°F (60°C)
• Service kit groups the thermostat and/or required sealing components for cooling-system maintenance
• Helps restore correct engine warm-up and operating-temperature control
• Fit-specific design reduces guesswork during scheduled cooling-system service

Specifications

• Manufacturer: Sierra
• Part Number: 18-3650
• Product Type: Thermostat Kit
• Application: 1998-and-older MerCruiser GM inline 4- and 6-cylinder engines
• Temperature Rating: 140°F (60°C)
• OEM / Aftermarket Interchange: MerCruiser 59078Q3, 59078T3, 59078T4; GLM 13370; Mallory 9-43153