Finding the correct {propeller|prop|screw) fastener size for your Yanmar 250 engine can be surprisingly tricky. Many owners initially struggle, leading to potential problems if the wrong measurement is used. This guide aims to provide clarity. Generally, most Yamaha 250 engines utilize a nut that’s either a M8 x 1.25 or an M10 x 1.25 thread. Howe… Read More