Generac iX 800 troubleshooting: 76 symptom-cause-remedy entries from the manufacturer's own service documentation.
Generac iX 800 — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| No DC Output | Engine RPM out of specification | Check engine RPM (Test 1) |
| No DC Output | Bad connections in harness | Check harness for good connections |
| No DC Output | Bad main coil of stator | Replace stator |
| No DC Output | Bad DC coil on stator | Replace stator |
| No DC Output | Bad DC rectifier | Replace DC rectifier |
| No DC Output | Bad DC circuit breaker | Replace DC circuit breaker |
| No DC Output | Bad inverter module | Replace inverter module |
| No DC Output | Bad wire | Repair or replace wire |
| Overload Light is On | Load connected | Disconnect the load, then restart the engine and check the AC output again |
| Overload Light is On | No load connected; nothing found | Go to Problem 1, Test 2 |
| Overload Light is On | Bad component | Replace component |
| Engine Will Not Pull Start | Obstructions that would cause binding of the recoil once installed | Visually inspect for obstructions that would cause binding of the recoil once installed |
| Engine Will Not Pull Start | Recoil function bad | Replace |
| Engine Will Not Pull Start | An internal engine failure has possibly occurred | Replace engine |
| Engine Will Not Pull Start | External component failure that would cause the engine to be siezed | Visually inspect external components for a failure that would cause the engine to be siezed; replace component |
| Flex Power Feature is Not Responding | Bad Flex Power switch | Replace switch |
| Flex Power Feature is Not Responding | Bad inverter module | Replace inverter module |
| Engine Will Not Start | Low oil light on | Check oil level; replenish oil |
| Engine Will Not Start | Fuel shutoff valve off | Turn on |
| Engine Will Not Start | Fuel supply off | Replenish fuel supply |
| Engine Will Not Start | Bad choke assembly | Replace choke |
| Engine Will Not Start | Bad fuel shutoff switch | Replace |
| Engine Will Not Start | Bad trigger assembly | Replace |
| Engine Will Not Start | Bad ignition coil | Replace ignition coil |
| Engine Will Not Start | Bad ignition winding | Replace stator |
| Engine Will Not Start | No spark | Go to Problem 8 |
| Engine Will Not Start | Bad spark plug | Replace |
| Engine Will Not Start | Bad fuel pump | Replace fuel pump |
| Engine Will Not Start | Bad carburetor | Replace carburetor |
| Engine Will Not Start | Low engine compression | Contact technical service |
| Engine Will Not Start | Bad LED module | Replace LED module |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad choke assembly | Replace choke assembly |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad trigger assembly | Replace |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad stepper motor | Replace stepper motor |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad ignition coil | Replace ignition coil |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | No spark | Replace |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad fuel pump | Replace fuel pump |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad carburetor | Replace carburetor |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Engine miss apparent | Replace engine |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Bad LED module | Replace LED module |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Unit not producing AC power | Go to Problem 1 |
| Unit Shuts Down for Low Oil | Low oil level | Check oil level; replenish oil |
| Unit Shuts Down for Low Oil | Bad oil level switch | Replace |
| Engine will not start | Over choking | Check that the choke is working properly |
| Engine will not start | Excessively rich fuel mixture | Clean or replace carburetor |
| Engine will not start | Water in fuel | Check fuel quality and supply |
| Engine will not start | Intake valve stuck open | Contact technical service |
| Engine will not start | Needle/float stuck open | Clean or replace carburetor |
| Engine will not start | Leaking carburetor mounting gaskets | Replace carburetor mounting gaskets |
| Engine will not start | Intake valve stuck closed | Contact technical service |
| Engine will not start | Inoperative fuel pump | Replace fuel pump |
| Engine will not start | Plugged fuel filter(s) | Inspect the fuel filter and pulse line |
| Engine will not start | Varnished carburetor | Clean or replace carburetor |
| Poor compression | Loose cylinder head bolts | |
| Poor compression | Failed cylinder head gasket | |
| Poor compression | Burned valves or valve seats | |
| Poor compression | Insufficient valve clearance | |
| Poor compression | Warped cylinder head | |
| Poor compression | Warped valve stem | |
| Poor compression | Worn or broken piston ring(s) | |
| Poor compression | Worn or damaged cylinder bore | |
| Poor compression | Broken connecting rod | |
| Poor compression | Worn valve seats or valves | |
| Poor compression | Worn valve guides | |
| Engine will not pull start | The engine could be seized | Test engine function |
| Engine will not pull start | The recoil could have become detached from the flywheel | Replace |
| Engine will not pull start | The recoil mechanism could be broken and not retracting properly | Replace |
| No AC Output | Disconnect the load, then restart the engine and check the AC output again; Remove receptacle panel and verify connections of receptacles and wiring to inverter; Check harness for good connections; Test 1 – Check engine RPM; Test 2 – Test subcoil of stator; Test 3 – Test main coil of stator; Replace inverter module; Replace stator; Repair or replace component; Repair or replace wire | |
| No DC Output (iX Units Only) | Test 1 – Check engine RPM; Check harness for good connections; Test 5 – Test DC rectifier; Test 4 – Check the DC circuit breaker; Test 6 – Test DC coil on stator; Replace DC circuit breaker; Replace DC rectifier; Replace stator; Repair or replace wire | |
| Overload Light Is On | IX Units - Disconnect load, restart engine and check AC output again; iQ2000 - Disconnect load, press and hold reset button, then release. If overload light goes out, load is to much for the unit; Go to “Problem 1, Test 2” | |
| Engine Will Not Pull Start | Obstructions that would cause binding of the recoil once installed; An internal engine failure has possibly occurred; External components failure that would cause the engine to be siezed | Visually inspect for obstructions that would cause binding of the recoil once installed; Test 7 – Test recoil function; Test 8 – Test engine function; Visually inspect external components for a failure that would cause the engine to be siezed; Replace component |
| Flex Power/Mode Feature is Not Responding | Test 21 – Test Flex Power/Mode switch; Replace switch; Replace inverter module | |
| Engine Will Not Start | Low oil; Fuel shutoff valve off; Fuel supply; Fuel quality; Choke; Fuel pump; Carburetor; Spark plug; Spark; Ignition coil; Trigger assembly; Ignition winding; Engine compression | Replenish oil; Turn on fuel shutoff valve; Replenish fuel supply; Check fuel quality and supply; Replace choke; Test 17 – Check choke assembly; Test 16 – Test fuel shutoff switch; Test 14 – Test trigger assembly; Test 15 – Test ignition coil; Test 20 – Test ignition winding; Test 9 – Check spark; Test 10 – Check spark plug; Test 11 – Check fuel pump; Test 13 – Check engine compression; Test 12 – Check carburetor; Replace carburetor; Replace fuel pump; Repair or replace; Replace stator; Replace ignition coil; Replace LED module; Go to “Problem 8”; Replace engine; Contact technical service |
| Engine Hunts / Erratic Idle or Will Not Come Up to Speed | Choke assembly; Trigger assembly; Stepper motor; Ignition coil; Spark; Fuel pump; Carburetor; Engine miss apparent | Test 17 – Check choke assembly; Replace choke assembly; Test 14 – Test trigger assembly; Test 18 – Test stepper motor; Replace stepper motor; Test 15 – Test ignition coil; Replace ignition coil; Test 9 – Check spark; Test 11 – Check fuel pump; Replace fuel pump; Test 12 – Check carburetor; Replace carburetor; Replace inverter module; Replace engine |
| Unit Shuts Down for Low Oil | Low oil level; Oil level switch | Check oil level; Replenish oil; Test 20 – Test oil level switch; Replace engine |
| LED Display INOP | Test 6 – DC wiring; Replace LED module; Replace stator winding assembly |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Low oil light on; Fuel shutoff valve off; Fuel supply off; Bad choke assembly. See the table for the matching fixes.
Documented causes: Bad choke assembly; Bad trigger assembly; Bad stepper motor; Bad ignition coil. See the table for the matching fixes.
Documented causes: Loose cylinder head bolts; Failed cylinder head gasket; Burned valves or valve seats; Insufficient valve clearance. See the table for the matching fixes.