Starter System - Kohler Command Pro EFI ECH940 Service Manual

NOTE: Do not crank engine continuously for more than 10 seconds. Allow a 60 second cool-down period between
starting attempts. Failure to follow these guidelines can burn out starter motor.
NOTE: If engine develops suffi cient speed to disengage starter but does not keep running (a false start), engine
rotation must be allowed to come to a complete stop before attempting to restart engine. If starter is engaged
while fl ywheel is rotating, starter pinion and fl ywheel ring gear may clash and damage starter.
NOTE: If starter does not crank engine, shut off starter immediately. Do not make further attempts to start engine until
condition is corrected.
NOTE: Do not drop starter or strike starter frame. Doing so can damage starter.
NOTE: Battery must be tested and confi rmed acceptable prior to troubleshooting starter system. Follow battery or
OEM battery testing procedures.
Engines in this series use solenoid shift starters.
Troubleshooting-Starting Diffi culties
Condition
Starter does not energize.
Starter energizes but turns
slowly.
SOLENOID SHIFT STARTERS
When power is applied to starter electric solenoid moves
drive pinion out onto drive shaft and into mesh with
fl ywheel ring gear. When pinion reaches end of drive
shaft it rotates fl ywheel and cranks engine.
When engine starts and start switch is released, starter
solenoid is deactivated, drive lever moves back, and
drive pinion moves out of mesh with ring gear into
retracted position.
62 690 13 Rev. A
Possible Cause
Battery Check specifi c gravity of battery and battery state of charge. If
low, recharge or replace battery as necessary.
Wiring Clean corroded connections and tighten loose connections.
Replace wires in poor condition and with frayed or broken
insulation.
Starter Switch By-pass switch or solenoid with a jumper wire. If starter
or Solenoid cranks normally, replace faulty components. Consult with
OEM electrical system service procedures for OEM related
component diagnostics. Perform solenoid test procedure.
Battery Check specifi c gravity of battery and battery state of charge. If
low, recharge or replace battery as necessary.
Transmission Make sure clutch or transmission is disengaged or placed
or Engine in neutral. This is especially important on equipment with
hydrostatic drive. Transmission must be exactly in neutral to
prevent resistance which could keep engine from starting.
Check for seized engine components such as bearings,
connecting rod, and piston.
KohlerEngines.com
Conclusion
Inspection
Drive Pinion
Check and inspect following areas:
● Pinion teeth for abnormal wear or damage.
● Surface between pinion and clutch mechanism for
nicks or irregularities which could cause seal damage.
● Check drive clutch by holding clutch housing and
rotating pinion. Pinion should rotate in only 1 direction.

Starter System

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