Generac XP6500 troubleshooting: 35 symptom-cause-remedy entries from the manufacturer's own service documentation.
Generac XP6500 — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| Engine is running, but no AC output is available. | Circuit breaker is open. | Reset circuit breaker. |
| Engine is running, but no AC output is available. | Poor connection or defective cord set. | Check and repair. |
| Engine is running, but no AC output is available. | Connected device is bad. | Connect another device that is in good condition. |
| Engine is running, but no AC output is available. | Fault in generator. | Contact Authorized Service Facility. |
| Engine is running, but no AC output is available. | GFCI trips the 20 Amp outlets. | Repair the "short" and reset the GFCI. |
| Engine runs good but bogs down when loads are connected. | Short circuit in a connected load. | Disconnect shorted electrical load. |
| Engine runs good but bogs down when loads are connected. | Generator is overloaded. | See "Don't Overload the Generator". |
| Engine runs good but bogs down when loads are connected. | Engine speed is too slow. | Contact Authorized Service Facility. |
| Engine runs good but bogs down when loads are connected. | Shorted generator circuit. | Contact Authorized Service Facility. |
| Engine will not crank. | Battery weak or dead. | Recharge or replace battery (see "No Battery Charger DC output" at bottom of guide); Start engine manually using recoil starter. |
| Engine will not start; or starts and runs rough. | Fuel shut-off is OFF. | Turn Fuel shut-off ON. |
| Engine will not start; or starts and runs rough. | Dirty air cleaner. | Clean or replace air cleaner. |
| Engine will not start; or starts and runs rough. | Out of gasoline. | Fill fuel tank. |
| Engine will not start; or starts and runs rough. | Stale gasoline. | Drain fuel tank and fill with fresh fuel. |
| Engine will not start; or starts and runs rough. | Spark plug wire not connected to spark plug. | Connect wire to spark plug. |
| Engine will not start; or starts and runs rough. | Bad spark plug. | Replace spark plug. |
| Engine will not start; or starts and runs rough. | Water in gasoline. | Drain fuel tank; fill with fresh fuel. |
| Engine will not start; or starts and runs rough. | Over-choking. | Put choke knob to No Choke position. |
| Engine will not start; or starts and runs rough. | Low oil level. | Fill crankcase to proper level. |
| Engine will not start; or starts and runs rough. | Excessive rich fuel mixture. | Contact Authorized Service Facility. |
| Engine will not start; or starts and runs rough. | Intake valve stuck open or closed. | Contact Authorized Service Facility. |
| Engine will not start; or starts and runs rough. | Engine has lost compression. | Contact Authorized Service Facility. |
| Engine shuts down during operation. | Out of gasoline. | Fill fuel tank. |
| Engine shuts down during operation. | Low oil level. | Fill crankcase to proper level. |
| Engine shuts down during operation. | Fault in engine. | Contact Authorized Service Facility. |
| Engine lacks power. | Load is too high. | See "Don't Overload the Generator". |
| Engine lacks power. | Dirty air filter. | Replace air filter. |
| Engine lacks power. | Engine needs to be serviced. | Contact Authorized Service Facility. |
| Engine "hunts" or falters. | Choke is opened too soon. | Move choke to halfway position until engine runs smoothly. |
| Engine "hunts" or falters. | Carburetor is running too rich or too lean. | Contact Authorized Service Facility. |
| No Battery Charger DC output. | Battery posts are corroded. | Clean battery posts. |
| No Battery Charger DC output. | Battery cable is bad. | Replace cable. |
| No Battery Charger DC output. | Battery is defective. | Check battery condition; replace if defective. |
| No Battery Charger DC output. | Receptacle is bad. | Contact Authorized Service Facility. |
| No Battery Charger DC output. | Battery Charger in-line fuse (1.5A) melted open. | Replace fuse with identical 1.5A replacement fuse only (located inside control panel). |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Fuel shut-off is OFF.; Dirty air cleaner.; Out of gasoline.; Stale gasoline.. See the table for the matching fixes.
Documented causes: Circuit breaker is open.; Poor connection or defective cord set.; Connected device is bad.; Fault in generator.. See the table for the matching fixes.
Documented causes: Battery posts are corroded.; Battery cable is bad.; Battery is defective.; Receptacle is bad.. See the table for the matching fixes.