O - other possible causes

I - most probable cause

problem
Causes	Starter clicking		Slow cranking	Starter spins but engine doesn't	Starter clunks but engine doesn't turn	No starter sound	starter current draw too high
Battery not fully charged	I		I		I	I
Loose battery cables	I		I		I	O	O
Defective battery	I		O		O	O	O
Shorted or loose starter wire	O		O		O	O	O
Defective solenoid	O					O	O
Engine overheated			O		O
Low temperature			I		O
Thick oil			O		O
Internal engine malfunction			O		O
Defective starter			O		O
Defective starter drive			O	I
Open circuit in starter solenoid					I		I
Short in field or armature coils					I		I
Neutral safety switch						O
Fusible link fried						O
Defective ignition switch						O
Clutch switch						O

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