Disconnect the spark plug wire(s) and battery cables for safety
Unscrew the pump housing cover to expose the impeller
Reinstall the lower unit onto the motor and test the engine in water to verify strong water output from the tell-tale outlet
or a noticeable drop in RPM under load
Air Filter Element – Fits Yanmar 2QM, 3HM, 3QM (Replaces 124770-12540) 91HP Disconnect the spark plug wire(s)Product Details This genuine Yanmar Air Filter Element is designed for a direct fit on various Yanmar marine diesel engines, including the 2QM, 2QM15, 2QM20, 3QM, 3QM30, 3HM, 3HM35, 3HM35F, and 3HMF models. It ensures proper air intake and filtration for optimal engine performance and longevity. This unit serves as a direct replacement for Yanmar OEM part number 124770 12540. Designed for simple, direct fit installation. Ensures a clean air supply,