Thermostat Kit – Fits Volvo Penta AQD40A, TMD40A, TAMD40B Diesel Engines (Replaces 3831425) 2.5HP or missing vanes on the

or missing vanes on the impeller itself

Sierra 18-3256

Stainless Steel (Components) Housing Color Black/Silver Weight 86

A general guideline is to inspect the belt during every oil change and plan for replacement every 3-5 years or as recommended in your Yanmar service manual

This kit includes the correct key type for the specified engine models

Thermostat Kit – Fits Volvo Penta AQD40A, TMD40A, TAMD40B Diesel Engines (Replaces 3831425) 2.5HP or missing vanes on theProduct Details This Thermostat Kit Fits Volvo Penta AQD40A, TMD40A, TAMD40B Diesel Engines (Replaces 3831425) is designed for a wide range of Volvo Penta diesel marine engines, including AQD, TMD, and TAMD series models. It operates at a 76C (169F) opening temperature to maintain optimal engine performance in both saltwater and freshwater cooling systems. This kit serves as a direct replacement for Volvo Penta part numbers 3831425, 467014, and