Testing Solenoid; Test Equipment; Testing Equipment Wiring; Anti-Afterfire System Early Style Optional On 402700 Only, Before Code 80080112 - Briggs & Stratton Twin Cylinder L-Head Repair Manual

Testing Solenoid

If solenoid does not click, the problem may be in
equipment wiring or solenoid. To determine whether
problem is with wiring or solenoid, perform the
following tests in the order shown.

Test Equipment

The digital multimeter, Tool #19390, is required to test
the solenoid equipment wiring.
The following tests will be performed with the meter in
the (DC volts) position, Fig. 59.
V

Testing Equipment Wiring

1. With keyswitch in OFF position, disconnect equip-
ment wiring harness connector from solenoid.
2. Attach red meter test lead into equipment wiring
harness connector.
3. Attach black test lead to a good ground, Fig. 60.
4. Turn keyswitch to ON position.
a. Meter should display battery voltage at
connector.
If meter does not display battery voltage, problem is
with wiring harness. Check for loose or broken wire. If
meter displays battery voltage, test solenoid.
Testing Solenoid
1. Remove solenoid from carburetor.
2. Place either terminal of a 9 volt transistor battery
on the solenoid connector and other terminal on
body of solenoid, Fig. 61.
3. Plunger should retract freely.
4. When battery is removed, plunger should return
freely.
Replace solenoid if plunger sticks or doesn't move.
Anti-Afterfire System Early Style Optional
On 402700 Only,
Before Code 80080112
Some models are equipped with an early style Anti-After-
fire System. The system consists of a vacuum valve and
solenoid assembly and vacuum block assembly located
in the air cleaner base. Crankcase vacuum is supplied to
the vacuum valve assembly through a "Tee" fitting
located in the fuel pump vacuum line. Electrical power to
operate the vacuum valve solenoid is supplied through
the equipment manufacturer's ignition switch, Fig. 62.
20
3
EQUIPMENT WIRING HARNESS
Fig. 60 – Test Equipment Wiring
SOLENOID
"TEE"
FITTING
TO CRANKCASE
Fig. 59 – Digital Multimeter
CONNECTOR
–
–
9
VOLTS
+
Fig. 61 – Test Solenoid
TO VACUUM
BLOCK
VACUUM
VALVE
ASSEMBLY
TO IGNITION
SWITCH
VACUUM LINE
Fig. 62 – Early Anti-Afterfire
+