Yamaha F4 Owner's Manual

Also see for F4: Owner's manual Brochure & specs Service manual Owner's manual Owner's manual

Contents

Trouble Recovery52A. Have serviced by a Yamaha dealer.Q. Is load on boat improperly distributed?A. Distribute load to place boat on an evenplane.Q. Is water pump or thermostat faulty?A. Have serviced by a Yamaha dealer.Q. Is there excess water in fuel filter cup?A. Drain filter cup.Engine power loss.Q. Is propeller damaged?A. Have propeller repaired or replaced.Q. Is propeller pitch or diameter incorrect?A. Install correct propeller to operate out-board at its recommended speed (r/min)range.Q. Is trim angle incorrect?A. Adjust trim angle to achieve most efficientoperation.Q. Is motor mounted at incorrect height ontransom?A. Have motor adjusted to proper transomheight.Q. Has warning system activated?A. Find and correct cause of warning.Q. Is boat bottom fouled with marine growth?A. Clean boat bottom.Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.Q. Are weeds or other foreign matter tangledon gear housing?A. Remove foreign matter and clean lowerunit.Q. Is fuel system obstructed?A. Check for pinched or kinked fuel line orother obstructions in fuel system.Q. Is fuel filter clogged?A. Clean or replace filter.Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.Q. Is spark plug gap incorrect?A. Inspect and adjust as specified.Q. Is ignition wiring damaged or poorly con-nected?A. Check wires for wear or breaks. Tightenall loose connections. Replace worn or bro-ken wires.Q. Have electrical parts failed?A. Have serviced by a Yamaha dealer.Q. Is specified fuel not being used?A. Replace fuel with specified type.Q. Is specified engine oil not being used?A. Check and replace oil with specified type.Q. Is thermostat faulty or clogged?A. Have serviced by a Yamaha dealer.Q. Is air vent screw closed?A. Open the air vent screw.Q. Is fuel pump damaged?A. Have serviced by a Yamaha dealer.