Yamaha F225F Owner's Manual

Also see for F225F: Service manual

Contents

Maintenance77To check the spark plug1. Check the condition of the spark plug. Ifelectrode erosion becomes excessive orcarbon and other deposits are exces-sive, replace the spark plug with thespecified plug.2. Measure the spark plug gap using athickness gauge. If the spark plug gap isout of specification, replace the sparkplug with the specified plug.To install the spark plug1. Wipe off any dirt from the threads, insu-lator, and gasket surface of the sparkplug.2. Install the spark plug, and then tighten itto the specified torque.TIP:If a torque-wrench is not available when youare reinstalling a spark plug, a good estimateof the correct torque is 1/12 turn past finger-tight. When you are installing a new sparkplug, a good estimate of the correct torque is1/2 to 2/3 turn past finger-tight.3. Install the ignition coil, and then tightenthe bolt to the specified torque.4. Install the ECM cover.5. Install the flywheel magnet cover, andthen tighten the bolt to the specifiedtorque.EMU41872Inspecting engine idle speedNOTICEECM01691This procedure must be performed whilethe outboard motor is in the water.Inspect the engine idle speed using the me-ter that is equipped on the boat. Results mayvary depending on whether testing is con-ducted with the outboard motor in the water.1. Start the engine and allow it to warm upfully in neutral until it is running smooth-Standard spark plug:LFR6A-111. Spark plug gap2. Spark plug part number3. Spark plug I.D. mark (NGK)Spark plug gap:1.0–1.1 mm (0.039–0.043 in)ZMU06948Spark plug tightening torque:28 Nm (2.86 kgf-m, 20.7 ft-lb)Bolt tightening torque:8 Nm (0.82 kgf-m, 5.9 ft-lb)Bolt tightening torque:8 Nm (0.82 kgf-m, 5.9 ft-lb)