Slip motor pinion gear on armature shaft. Add a small
amount of gear lubricant to gear teeth. Position gasket,
spring washer and drive housing assembly. Fig. 69.
Fasten drive housing to end head securely with three
screws. The starter motor assembly is now ready for
installation to the engine.
GEAR DRIVE STARTERS
120 VOLT AC; 12 VOLT DC
STARTER MOTOR - USED ON MODEL
SERIES: 170000, 190000, 220000, 240000,
250000 and 320000.
The 120 volt electric starter is equipped with a three-
prong plug for safety. The longer prong in this plug is
connected to the starter motor housing. When the
starter motor is plugged into the three-wire cord supplied,
and the cord is plugged into a properly grounded
receptacle, it will protect the user from shock should the
starter-motor insulation fail for any reason. If a longer
extension cord is used with this starter, it should also
have three-prong and three-hole plugs. Fig. 68. DO
NOT USE extension cords longer than 25 feet (7.62 m).
These starter motors use a gear type engagement
method, similar to an automobile starter. When the
starter motor is activated, the helix on the starter motor is
activated, the helix on the starter motor shaft drives a
pinion gear into engagement with a ring gear attached to
the engine flywheel and cranks the engine.
CAUTION: 120 volt starter motor should first be Hi-Pot
tested before re-assembly to engine to determine if a
shock hazard exists.
Fig. 82 - 120 Volt Gear Drive Starter
Briggs & Stratton STARTERS
Gear Drive 12V & 120V
CAUTION: DO NOT run starter motors for more than
one minute without cooling 15 minutes.
It is recommended a battery of 32 ampere hour capacity
be used with the 12 volt starter. The battery cable size
should be #4 or #6.
NOTE: A battery of higher amperage may be required for
extremely cold weather starting conditions.
Replacing a Ring Gear
To replace a worn or damaged flywheel ring gear,
proceed as follows:
A steel ring gear must be used on the flywheel if the
pinion gear on the starter motor is made of steel, An
aluminum ring gear must be used on the flywheel if the
pinion gear on the starter motor is made of nylon.
Fig. 83 - Replacing Ring Gear
WARNING: DO NOT strike flywheel with a hard object or
metal tool as this may cause flywheel to shatter in
operation, causing personal injury or property damage.