Thermostat Kit (140°F/60°C) – Fits MerCruiser 2.5L & 3.0L (Replaces 59078Q3, 18-3650) 3.6HP as it will cause cooling

as it will cause cooling system malfunctions

Brand Part Number Mercury 78458A1 Sierra 18-2760 GLM 89150 Mallory 9-72810

Kit Components:

ensuring bolts are torqued to manufacturer specifications

What tools are needed to install this part

Thermostat Kit (140°F/60°C) – Fits MerCruiser 2.5L & 3.0L (Replaces 59078Q3, 18-3650) 3.6HP as it will cause coolingProduct Details This Thermostat Kit (140F 60C) is engineered for MerCruiser 2. 5L (120HP) and 3. 0L (140HP) inline 4 cylinder and 6 cylinder GM engines from 1998 and newer equipped with cast iron exhaust manifolds. It ensures your engine maintains the correct operating temperature for optimal performance and longevity. This kit serves as a direct replacement for a wide range of part numbers from brands including MerCruiser, Sierra, Force, GLM,