Thermostat – Fits Cummins MerCruiser QSD 2.8L & 4.2L (Replaces 8M0093561, 879194215) 440HP Carefully disconnect the electrical wiring

Carefully disconnect the electrical wiring harness and the vacuum hose from the old sensor

typically covering models made between 1990 and 2000

making sure the float level is set to the manufacturer's specification

5L) 175 2-Stroke Multiple series 26-14077 All serials through 1B417702+ Mercury 200-225 DFI (3

Thoroughly clean the mounting surfaces on the transom shield and sterndrive

Thermostat – Fits Cummins MerCruiser QSD 2.8L & 4.2L (Replaces 8M0093561, 879194215) 440HP Carefully disconnect the electrical wiringProduct Details This replacement Thermostat Fits Cummins MerCruiser QSD 2. 8L & 4. 2L Diesel Engines, ensuring your marine engine maintains the correct operating temperature for optimal performance and efficiency. It regulates coolant flow by opening at a precise 80C (176F) to prevent overheating and maintain stable conditions. It serves as a direct replacement for Mercury MerCruiser part numbers 8M0093561, 879194215, 879194233, and 39012036F.