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| GN0950 and GN0800 |
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| Troubleshooting Chart |
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| Symptom | Possible Cause(s) | Corrective Action |
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| Zero output from receptacles | 1. Engine speed is too slow | 1. | Adjust engine speed ✽ |
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| 2. | Open or shorted wiring | 2. | Clean and reconnect all wiring ✽ |
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| 3. | Faulty capacitor | 3. | Replace capacitor ✽ |
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| 4. | Open/shorted rotor or stator windings | 4. | Test winding resistance, replace winding |
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| if necessary ✽ |
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| 5. | Open rectifier | 5. | Test rectifier, replace if necessary ✽ |
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| Low output voltage with no load |
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| 6 Vac or above | 1. Engine speed is too slow | 1. | Adjust engine speed ✽ |
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| 2. | Open rectifier | 2. | Test rectifier, replace if necessary ✽ |
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| 3. | Faulty capacitor | 3. | Replace capacitor ✽ |
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| 4. | Open/shorted rotor or stator windings | 4. | Test winding resistance, replace winding |
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| if necessary ✽ |
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| Below 6 Vac | 1. Generator head not magnetized | 1. |
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| High output voltage with no load | 1. Faulty capacitor | 1. | Replace capacitor ✽ |
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| 2. | Engine speed is too fast | 2. | Adjust engine speed ✽ |
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| Low output voltage under load | 1. Open rectifier | 1. | Test rectifier, replace if necessary ✽ |
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| 2. | Engine speed too slow at full load | 2. | Adjust engine speed ✽ |
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| 3. | Excessive load applied | 3. | Reduce the applied load |
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| Erratic output voltage | 1. Dirty, corroded, or loose wiring | 1. | Referring to the wiring diagram, clean |
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| and reconnect all wiring ✽ |
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| 2. | Unbalanced load applied | 2. | Remove all loads, then apply each one |
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| individually to determine which one is |
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| causing erratic function |
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| Noisy operation | 1. Loose generator or engine bolt | 1. | Tighten all mountings |
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| 2. | Short circuit in generator field or load | 2. | Test winding resistance, replace field |
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| winding if necessary✽ |
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| Test load devices for shorts. Replace |
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| defective load device. |
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| 3. | Faulty bearing | 3. | Replace bearing |
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| Engine won’t start | 1. No fuel. | 1. | Check fuel. Use a 50:1 mix of gas and oil. |
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| (See page 2) |
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| 2. | Fuel switch is in closed position. | 2. | Place fuel switch in open position. |
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| 3. | Engine switch is in closed position. | 3. | Place engine switch in open position. |
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| 4. | Spark plug dirty or wrong gap | 4. | Clean spark plug. Adjust gap. (See page 3) |
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| Replace if necessary. |
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✽These diagnostic and repair procedures should be performed by an authorized service center.
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