Textron JACOBSEN GP400, Technical/Repair Manual

Page: 100 / 354

4-48 4252490-Rev A
ELECTRICAL
4
Fuel Shutoff Timer Test
See Figure 4-29.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Remove fuel shutoff timer. (See “Fuel Shutoff Timer”
on page 4-64.)
3. Set the digital multimeter to read DC voltage.
Figure 4-29
NOTE
The fuel shutoff timer must be positioned vertically with
the connector end facing down to properly perform this
test.
4. Using a 12-volt DC power source, connect the
positive output terminal to terminals (1 and 2) and
connect negative output to terminal (3).
5. Connect the red test lead to terminal (4).
6. Connect the black test lead to terminal (3).
7. Measure voltage between terminals (3 and 4).
Is approximately 12 volts indicated?
YES The timer is faulty; replace the fuel shutoff
timer.
NO Proceed to step 8.
8. Disconnect the positive output from terminal (1).
9. Measure the voltage between terminals (3 and 4).
Is approximately 12 volts indicated?
YES Proceed to step 10.
NO The fuel shutoff timer is faulty; replace the
fuel shutoff timer.
10. Wait approximately 7 seconds. Measure the voltage
between terminals (3 and 4).
Is 0 volts indicated?
YES The fuel shutoff timer is good.
NO The fuel shutoff timer is faulty; replace the
fuel shutoff timer.
Carb Solenoid Test (Gasoline)
See Figure 4-30.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.).
2. Set the meter to read ohms.
3. Touch meter leads to each other and confirm a
resistance value of 0.0 ohms.
Figure 4-30
4. Tag and disconnect the carb solenoid wire connector
(2).
5. Measure the resistance between terminal (2) and
ground (1).
Is the resistance value within 40 ohms ± 10% at
68° F (20° C)?
YES The carb solenoid is good.
NO The carb solenoid is faulty; replace the carb
solenoid.
Required Tools or Equipment
• Digital Multimeter
• 12-Volt DC Power Source
2
TN3851
1
4
3
Required Tools or Equipment
Digital Multimeter or Ohmmeter
2
TN2739
1