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Troubleshooting
PROBLEM
Engine is running, but
AC output is not
available.
Engine runs well at
no-load, but bogs when
load is applied.
Engine will not start; or
starts and runs rough.
Engine shuts down
during operation.
Battery does not charge
with generator opera-
tion.
Engine lacks power.
Owner's Manual for Portable Generator
CAUSE
1. Circuit breaker OPEN.
2. Poor connection or defective
cord set.
3. Connected device is bad.
4. Fault in generator.
5. GFCI breaker module is
OPEN.
1. Short circuit in a connected
load.
2. Generator is overloaded.
3. Engine speed is too slow.
4. Shorted generator circuit.
5. Clogged spark arrestor.
1. Dirty air filter.
2. Out of fuel.
3. Stale fuel.
4. Spark plug wire not connected
to spark plug.
5. Bad spark plug.
6. Water in fuel.
7. Low oil level.
8. Excessive rich fuel mixture.
9. Intake valve stuck open or
closed.
10. Engine lost compression.
11. Fuel pump failure.
12. Ignition fuse open.
13. Low battery charge or no con-
nection.
14. Possible blown 5 Amp fuse
protection engine switch.
1. Out of fuel.
2. Low oil level.
3. Fault in engine.
4. Automatic COsense® shut-off
due to accumulating carbon
monoxide (red light) on side
panel.
5. Automatic COsense® shut-off
due to a system fault (yellow
light) on side panel.
1. Possible blown 10 Amp fuse
protection charge coil.
1. Load is too high.
2. Dirty air filter.
3. Engine needs to be serviced.
4. Clogged spark arrestor.
CORRECTION
1. Reset circuit breaker.
2. Check and repair.
3. Connect another device that is
in good condition.
4. Contact IASD.
5. Correct ground fault and press
reset button on GFCI breaker
module.
1. Disconnect shorted electrical
load.
Know Generator Limits
2. See
3. Contact IASD.
4. Contact IASD.
5. Clean spark arrestor screen.
1. Clean or replace air filter.
2. Fill fuel tank.
3. Drain fuel tank and fill with
fresh fuel.
4. Connect wire to spark plug.
5. Replace spark plug.
6. Drain fuel tank; fill with fresh
fuel.
7. Fill crankcase to correct level.
8. Contact IASD.
9. Contact IASD.
10. Contact IASD.
11. Contact IASD.
12. Replace fuse.
13. Charge battery. Battery con-
nection required for pull start.
14. Contact IASD.
1. Fill fuel tank.
2. Fill crankcase to correct level.
3. Contact IASD.
4. Follow all safety instructions
and relocate generator to an
open area outside, far away
from windows, doors and
COsense®
vents. See
5. Start generator to confirm yel-
low light blinks when/if genera-
tor shut-off. If COsense® fault
continues, contact IASD.
1. Contact IASD.
1. Reduce load (see
erator Limits
).
2. Clean or replace air filter.
3. Contact IASD.
4. Clean spark arrestor screen.
.
.
Know Gen-
19
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Troubleshooting
Need help?
Do you have a question about the XT8500EFI and is the answer not in the manual?
Questions and answers
what is the part with the copper posts that the positive and negative battery cables hook up to, broke the post and need a replacement part
The engine running but there's no electrical output
The Generac Power Systems XT8500EFI engine may be running but not producing electrical output due to the following possible causes:
1. Circuit breaker is open – Reset the circuit breaker.
2. Poor connection or defective cord set – Check and repair the connection or replace the cord set.
3. Connected device is faulty – Connect another device that is known to be in good condition.
4. Fault in the generator – Contact an Independent Authorized Service Dealer (IASD).
5. GFCI breaker module is open – Correct the ground fault and press the reset button on the GFCI breaker module.
These steps can help diagnose and resolve the issue.
This answer is automatically generated