Maintenance50NOTE:Consult your Yamaha dealer if any operationis abnormal.EMU29171Checking propellerWARNINGEWM00321You could be seriously injured if the en-gine accidentally starts when you are nearthe propeller. Before inspecting, removing, or install-ing the propeller, remove the spark plugcaps from the spark plugs. Also, placethe shift control in neutral, turn the mainswitch to “ ” (off) and remove the key,and remove the lanyard from the enginestop switch. Turn off the battery cut-offswitch if your boat has one. Do not use your hand to hold the propel-ler when loosening or tightening thepropeller nut. Put a wood block betweenthe anti-cavitation plate and the propel-ler to prevent the propeller from turning.Checkpoints Check each of the propeller blades forwear, erosion from cavitation or ventilation,or other damage. Check the propeller shaft for damage. Check the splines / shear pin for wear ordamage. Check for fish line tangled around the pro-peller shaft. Check the propeller shaft oil seal for dam-age.NOTE:If the shear pin equipped: it is designed tobreak if the propeller hits a hard underwaterobstacle to help protect the propeller anddrive mechanism. The propeller will then spinfreely on the shaft. If this happens, the shearpin must be replaced.ZMU04262ZMU01897
