Engine Will Not Crank or Cranks Slowly

Cause Correction
Engine Drive Units
Engaged
Disengage driven units and Check for loading from malfunctioning accessories.

OK

 

Crankshaft Rotation
Restricted

Rotate the crankshaft to Check for rotational Resistance.

OK

 
Starting Circuit
Connections Loose or Corroded
Check and tighten Connections.

OK

 
Battery Charge Low Check battery voltage.

OK

 
No Voltage to Starter Solenoid Check voltage to Solenoid.

OK

 
Solenoid or Starting Motor Malfunction Replace Starting Motor.

OK

 
Starting Motor Operating But Not Cranking the Engine Remove the Starting Motor and check for Broken teeth on the Flywheel or broken Starting motor spring.