Yamaha manual 100

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EMU01204¯

TROUBLESHOOTING

A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. The troubleshooting chart describes basic checks and possible remedies. (This chart covers all Yamaha outboard motors. Therefore, some items may not apply to your model.)

If your outboard motor requires repair, bring it to a Yamaha dealer.

Trouble		Possible Cause		Remedy
	1.	Battery capacity weak or low.	1.	Check battery condition. Use
				battery of recommended capacity.
	2.	Battery connections loose or	2.	Tighten battery cables and clean
		corroded.		battery terminals.
A. Starter will not	3.	Fuse for electric start circuit blown.	3.	Check for cause of electric
operate.				overload and repair. Replace fuse
				with one of correct amperage.
	4.	Starter components faulty.	4.	Have serviced by a Yamaha
				dealer.
	5.	Shift lever in gear.	5.	Shift to neutral.
	1.	Fuel tank empty.	1.	Fill tank with clean, fresh fuel.
	2.	Fuel contaminated or stale.	2.	Fill tank with clean, fresh fuel.
	3.	Fuel filter clogged.	3.	Clean or replace filter.
	4.	Starting procedure incorrect.	4.	Read "STARTING ENGINE"
				section.
	5.	Fuel pump malfunctions.	5.	Have serviced by a Yamaha
				dealer.
	6.	Spark plug(s) fouled or incorrect	6.	Inspect spark plug(s). Clean or
B. Engine will not		type.		replace with recommended type.
start (Starter	7.	Spark plug cap(s) fitted incorrectly.	7.	Check and re-fit cap(s).
operates).	8.	Poor connections or damaged	8.	Check wires for wear or breaks.
		ignition wiring.		Tighten all loose connections.
				Replace worn or broken wires.
	9.	Ignition parts faulty.	9.	Have serviced by a Yamaha
				dealer.
	10.	Engine stop switch lanyard not	10.	Attach lanyard.
		attached.
	11.	Engine inner parts damaged.	11.	Have serviced by a Yamaha
				dealer.

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