Yamaha 90A Owner's Manual

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Contents

Yamaha 90A Owner's Manual Manual pdf 76 page image

70Trouble RecoveryEMU29427TroubleshootingA problem in the fuel, compression, or igni-tion systems can cause poor starting, loss ofpower, or other problems. This section de-scribes basic checks and possible remedies,and covers all Yamaha outboard motors.Therefore some items may not apply to yourmodel.If your outboard motor requires repair, bringit to your Yamaha dealer.If the engine trouble-alert indicator is flash-ing, consult your Yamaha dealer.Starter will not operate.Q. Is battery capacity weak or low?A. Check battery condition. Use battery ofrecommended capacity.Q. Are battery connections loose or corrod-ed?A. Tighten battery cables and clean batteryterminals.Q. Is fuse for electric start relay or electric cir-cuit blown?A. Check for cause of electric overload andrepair. Replace fuse with one of correct am-perage.Q. Are starter components faulty?A. Have serviced by a Yamaha dealer.Q. Is shift lever in gear?A. Shift to neutral.Engine will not start (starter operates).Q. Is fuel tank empty?A. Fill tank with clean, fresh fuel.Q. Is fuel contaminated or stale?A. Fill tank with clean, fresh fuel.Q. Is fuel filter clogged?A. Clean or replace filter.Q. Is starting procedure incorrect?A. See page 40.Q. Has fuel pump malfunctioned?A. Have serviced by a Yamaha dealer.Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.Q. Are spark plug cap(s) fitted incorrectly?A. Check and re-fit cap(s).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. Are ignition parts faulty?A. Have serviced by a Yamaha dealer.Q. Is engine shut-off cord (lanyard) not at-tached?A. Attach cord.Q. Are engine inner parts damaged?A. Have serviced by a Yamaha dealer.Engine idles irregularly or stalls.Q. Are spark plug(s) fouled or of incorrecttype?A. Inspect spark plug(s). Clean or replacewith recommended type.