Kohler Courage SV710-740 Service Manual page 78

1. Trace B+ lead from rectifier-regulator to
key switch, or other accessible connection.
Disconnect it from switch or connection.
Connect an ammeter from loose end of B+
lead to positive terminal of battery. Connect
DC voltmeter from loose end of B+ lead to
negative terminal of battery. With engine
running at 3600 RPM, read voltage on
voltmeter.
If voltage is 13.8 volts or more, place a
minimum load of 5 amps* on battery to
reduce voltage. Observe ammeter.
*NOTE: Turn on lights, if 60 watts or more.
2. Remove connector from rectifier-regulator.
With engine running at 3600 RPM, measure
AC voltage across stator leads using an AC
voltmeter.
3a. With engine stopped, measure the resistance
across stator leads using an ohmmeter.
3b. With the engine stopped, measure the
resistance from each stator lead to ground
using an ohmmeter.
1. Perform same test as step 1 above.
These engines may use either an inertia drive or
solenoid shift style electric starter. The inertia
drive starter is covered first and the solenoid shift
following.
NOTE: Do not crank the engine continuously for
more than 10 seconds at a time. If the engine
does not start, allow a 60 second cool-down
period between starting attempts. Failure
to follow these guidelines can burn out the
starter motor.
Or place a 2.5 ohm, 100 watt resistor
across battery terminals.
1. If voltage is 13.8-14.7 and charge rate increases
when load is applied, the charging system is
OK and battery was fully charged.
If voltage is less than 13.8 or charge rate does
not increase when load is applied, test stator
(Tests 2 and 3).
2. If voltage is 28 volts or more, stator is OK.
Rectifier-regulator is faulty. Replace the
rectifier-regulator.
If voltage is less than 28 volts, stator is probably
faulty and should be replaced. Test stator
further using an ohmmeter (Test 3).
3a. If resistance is 0.064/0.2 ohms, the stator is OK.
If the resistance is infinity ohms, stator is open.
Replace stator.
3b. If the resistance is infinity ohms (no continuity),
the stator is OK (not shorted to ground).
If resistance (or continuity) is measured, the
stator leads are shorted to ground. Replace
stator.
1. If the voltage is 14.7 volts or less the charging
system is OK. The battery is unable to hold a
charge. Service battery or replace as necessary.
If voltage is more than 14.7 volts, the rectifier-
regulator is faulty. Replace rectifier-regulator.
NOTE: If the engine develops sufficient speed to
disengage the starter but does not keep
running (a false start), the engine rotation
must be allowed to come to a complete stop
before attempting to restart the engine. If
the starter is engaged while the flywheel is
rotating, the starter pinion and flywheel ring
gear may clash, resulting in damage to the
starter.