Installation Guidelines for Air-Cooled Generators
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Section 8
Troubleshooting
8.1 — Engine Troubleshooting
Table 8-1. Engine Diagnostics
Problem
Cause
Correction
Engine will not crank.
1) Fuse blown.
2) Loose, corroded or defective battery
cables.
3) Defective starter contact.
4) Defective starter motor.
5) Dead Battery.
1) Correct short circuit condition by
replacing 7.5 Amp fuse.
2) Tighten, clean or replace as necessary.*
3) Tighten, clean or replace as necessary.*
4) Tighten, clean or replace as necessary.*
5) Charge or replace battery.
Engine cranks but will not
start.
1) Out of fuel.
2) Defective fuel solenoid (FS).
3) Defective spark plug(s).
4) Valve clearance needs adjustment.
1) Replenish fuel / Turn on fuel valve.
2) *
3) Clean, re-gap or replace plug(s).
4) Adjust valve clearance.
Engine starts hard and runs
rough.
1) Air cleaner plugged or damaged.
2) Defective spark plug(s).
3) Fuel regulator not set.
4) Fuel pressure incorrect.
5) Fuel selector in wrong position.
1) Check / replace air cleaner.
2) Clean, re-gap or replace plug(s).
3) Set fuel regulator.
4) Confirm fuel pressure to regulator is 10-
12” water column (19-22mm mercury)
for LP, and 3.5 - 7” water column (9-
13mm mercury) for natural gas.
5) Move selector to correct position.
Generator is set to OFF, but
the engine continues to run.
1) Control board wired incorrectly.
2) Defective control board.
1) Repair wiring or replace control board.*
2) Replace control board.
No AC output from genera-
tor.
1) Main line circuit breaker is in the OFF
(or OPEN) position.
2) Generator internal failure.
1) Reset circuit breaker to ON (or
CLOSED).
2) *
Unit consumes large
amounts of oil.
1) Oil tank is over filled with oil.
2) Engine breather defective.
3) Improper type or viscosity of oil.
4) Damaged gasket, seal or hose.
1) Adjust oil to proper level.
2) *
3) See “Engine Oil Recommendations.”
4) Check for oil leaks.
* Contact an Authorized Independent Service Dealer for assistance.
