6-19
WARNING
Many troubleshooting procedures present hazards that can result in severe personal inju-
ry or death. Only qualified service personnel with knowledge of fuels, electricity, and machinery haz-
ards should perform service procedures. Review safety precautions on page iii.
TABLE 6-8. BEGIN SPEC B CONTROL TROUBLESHOOTING – IGNITION MODE
Trouble Possible Cause Corrective Action Section/
Page
Engine Cranks 1. Restricted fuel supply due to: 1a. Add fuel if tank is low.
But Does Not a. Fuel level below pickup tube in tank. 1b. Open fuel supply valve (if equipped).
Start b. Fuel line supply valve closed. 1c. Replace clogged fuel filter and check 8-19
c. Fuel filter clogged. fuel supply for contamination.
2. Faulty ignition due to worn or fouled 2. Refer to
Ignition System
for test 8-6
spark plug, faulty plug wire, faulty and service procedures.
ignition coil or magneto.
3. Sticking choke or carburetor mixture 3. Refer to
Gasoline Fuel System
for 8-11
screws incorrectly adjusted. adjustments.
4. Fuel pump (E2) not working due to: 4a. Measure voltage between fuel pump 8-19
a. Fuel pump defective. connector and ground with the engine
b. Open circuit between fuel pump and cranking. If B+ voltage is not present,
control assembly (A1) or control proceed to 4b. If voltage is present,
assembly is defective. (min. 6 VDC) fuel pump is defective.
4b. Check continuity between control
assembly and fuel pump. If connections
are good and voltage was not measured
in 4a, replace control assembly (A1).
5. Fuel shutoff solenoid (E3) not 5. Measure voltage at fuel shutoff sol. (E3) 8-24
energized. terminals with the engine cranking. If B+
voltage is not present, check the wiring
connections and control assembly A1
output test. If voltage is present
(min. 6 VDC) and engine is not receiving
fuel, fuel shutoff solenoid is defective.
6. Faulty fuel solenoid, priming solenoid, 6. Refer to
LPG Fuel System
8-22
or regulator on LPG models. for service procedures.
7. Governor linkage stuck or binding. 7. Check governor arm movement. 8-9
See
Governor
section.
8. Oil level switch (S2) (Spec B-F, if 8a. Check oil level and add oil if low.
applicable)
closed due to:
a. Low oil level. 8b. Check low oil level switch. 10-2
b. Defective low oil level switch.
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