Remove Starter Motor; Testing Starter Motor; Starter Motor Specifications - Briggs & Stratton 405777 Series Manual

Test Bracket
A starter motor test bracket may be made as shown in
Fig. 5.
A growler or armature tester is available from an Automobile
Diagnostic service supplier.
TEST STARTER MOTOR

Remove Starter Motor

It is recommended that the starter motor be removed from the engine when testing starter motor performance. Remove rotating
screen and blower housing. Remove two starter motor mounting screws. Assemble starter to test bracket and clamp test bracket
in vise, Fig. 6.
IMPORTANT: DO NOT clamp motor housing in a vise or strike with a steel hammer. Starter motors contain two ceramic
magnets which can be broken or cracked if the motor housing is hit, deformed or dented.

Testing Starter Motor

A fully charged 12 volt battery is required.
1. The DC Shunt MUST be installed on the
negative (-) battery terminal as shown in Fig. 6.
2. Insert RED test lead into
and connect to RED post terminal on shunt.
3. Insert BLACK test lead into
and connect to BLACK post terminal on shunt.
4. Rotate selector to
5. Activate the starter motor and note reading on meter
and tachometer (RPM).
Note: Take reading after meter stabilizes (approxi-
mately 2 - 3 seconds).
6. A starter motor in good condition will be within
specifications listed.

Starter Motor Specifications

Minimum RPM:
Maximum Amperes:
If 12 volt starter motor does not perform satisfactorily, see
Conditions Affecting Starter Motor Performance.
TSM
receptacle in meter
receptacle in meter
position.
6500
35
DRILL TWO HOLES − 3/8"
EXTRA HOLE
FOR MOUNTING
FOR MOUNTING STARTER
STARTER BRACKETS
2-1/4"
(57.2 MM)
4"
(101.6 MM)
3-1/2"
(88.9 MM)
1"
(25.4 MM)
(254 MM)
METAL STOCK
1/4" (6.4 MM) THICK
STEEL
Fig. 5 − Test Bracket
STARTER
SWITCH
OPTIONAL
TACHOMETER
NOTE RPM OF
STARTER MOTOR
Fig. 6 − Testing Starter Motor
(9.5 MM) DIA.
DRILL AND TAP TWO
HOLES
FOR MOUNTING
B&S #19200
TACHOMETER USE #7
DRILL AND TAP HOLE FOR
1/4-20 NC SCREWS
3-1/2"
(88.9 MM)
10"
2"
(50.8 MM)
RED TEST LEAD
FROM METER
BLACK TEST
LEAD FROM
METER
3