Maintenance651. Start the engine and allow it to warm upfully in neutral until it is running smooth-ly.2. Once the engine has warmed up, verifywhether the idle speed is set to specifi-cation. For idle speed specifications,see page 9. If you have difficulty verify-ing the idle speed, or the idle speed re-quires adjustment, consult a Yamahadealer or other qualified mechanic.EMU29113Checking wiring and connectors Check that each connector is engaged se-curely. Check that each ground lead is properlysecured.EMU32112Checking propellerWARNINGEWM01881You could be seriously injured if the en-gine accidentally starts when you arenear the propeller. Before inspecting, re-moving, or installing the propeller, placethe shift control in neutral, turn the mainswitch to “ ” (off) and remove the key,and remove the clip from the engine shut-off switch. Turn off the battery cut-offswitch if your boat has one.Do not use your hand to hold the propellerwhen loosening or tightening the propellernut. Put a wood block between the anti-cavi-tation plate and the propeller to prevent thepropeller from turning.Checkpoints Check each of the propeller blades for ero-sion from cavitation or ventilation, or otherdamage. Check the propeller shaft for damage. Check the splines for wear or damage. Check for fish line tangled around the pro-peller shaft. Check the propeller shaft oil seal for dam-age.EMU30662Removing propellerEMU29197Spline models1. Straighten the cotter pin and pull it outusing a pair of pliers.2. Remove the propeller nut, washer, andspacer (if equipped). WARNING! DoZMU03240ZMU01897