7
7
NOTE: SPECIFICATION TABLES BEGIN ON PAGE 41 OF THIS SECTION.
STARTER ELECTRICAL INFORMATION AND
TEST PROCEDURES, BY SYSTEM
Note: Interpreting Starter Motor Test Results, All
Systems (Typical)
1. RPM below minimum and higher than normal
amps.
System 3
, System 4
Briggs & Stratton System 3 and System 4 consist of
a starter motor (4), starter switch and/or starter
solenoid (5), wiring harness, (wire #6 goes to engine
alternator), 6 or 12 volt battery (rechargeable) (3),
alternator, and separate trickle type battery charger
(2). A typical System 3 or System 4 engine is shown
in Fig. 8.
(–)
(+)
Fig. 8
2
4
3
5
6
1
NOTE:Some equipment manufacturers use a
battery and trickle charger of a different
style than illustrated. In such cases,
follow the equipment manufacturer’s
recommendations.
The alternator maintains charge during operation. If
the battery needs additional recharging, plug the
trickle charger into a 120 volt AC household outlet,
then connect to the battery. The battery will be fully
charged within 72 hours. Charging is not recom-
mended if temperatures are below 40° F (4.0° C). For
best results, charge the battery within temperature
limits of 40° F (4.0° C) to 105° F (40.0° C). Charge
overnight every two months during periods of storage.
Fig. 9
2
1
3
4
5
Battery Load Test (6 volt only)
For 12 volt test procedures, contact the battery
manufacturer or the original equipment manufacturer.
Parts required:
14 AWG stranded wire test leads with #70
alligator clips, red (1), and black (2).
Resistor (3) – 0.15 ohms x 240 watts
(minimum).
DMM (#19464) or VOA Meter.
Briggs & Stratton Part #396372 wire harness.
Set meter to DC volts as shown in Fig. 9.
a. Excessive Friction. Check for tight, dirty, or
worn bearings, bent armature, misalignment
of motor bearings.
b. Shorted armature.
c. Grounded armature.
d. Broken magnets.
2. Higher than normal amps and starter does not
turn.
a. Direct ground of brush leads.
b. Armature can not turn, binding.
3. Starter does not turn and no amps.
a. Open armature windings.
4. RPM below minimum and low amps.
a. Open armature windings.
b. Burned commutator bars.
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