YAMAHA PROPELLER 8 8.25X8

Function and technical context

The propeller is the fundamental propulsion element that transforms the engine's power into direct thrust towards the water. On Yamaha 8 hp outboard engines, this 8.25-inch diameter, 8-inch pitch propeller operates within the drive system, coupled directly to the engine output shaft. Its three-bladed design optimizes power transfer in small boats, ensuring efficient acceleration and predictable sailing behavior. Progressive wear of the blades or a crack in the propeller core reduces engine performance and can cause abnormal vibrations that damage the shaft bearings.

When to replace this part?

It is advisable to check the condition of the propeller at the beginning of each sailing season and after impacts with rocks, reefs or submerged debris, since cracks or deformations in the blades are not always visible to the naked eye. Typical symptoms include excessive engine vibration at cruising speed, unexplained loss of acceleration, or clunking from the driveshaft. Preventive replacement of the propeller every 3-5 years of intense use prevents costly damage to the drive shaft and ensures safe navigation during outings on the water.

Equivalent manufacturer part numbers