Mercury 59078T-3 140 Degree Thermostat Kit

Mercury - Mercruiser 59078T-3 140 Degree Thermostat Kit 

Mercury 59078T3 Thermostat is designed to help regulate proper engine operating temperature, protecting older MerCruiser engines from overheating or inefficient cooling. Built specifically for pre-1998 GM-based MerCruiser inline engines, this thermostat helps maintain consistent performance and engine reliability.

Manufactured to Mercury OEM specifications, the kit includes both the thermostat and cork gasket for a correct seal and dependable installation using common tools.

Features:

• Designed for older MerCruiser inline 4- and 6-cylinder engines made by General Motors
• Helps regulate proper engine operating temperature
• Includes thermostat and cork thermostat gasket
• Supports efficient engine performance and protection
• Easy replacement using common shop tools
• Manufactured to Mercury OEM standards for fit, function, and durability

Special Order Item - Minimum Order Quantity (2)

Replaces:

• Mallory 9-43153
• GLM 13370
• Redline RL3650

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