Specifications
| Fuel | gasoline |
|---|---|
| Standby power | 10 kW |
| Standby kVA | 10500 |
| Prime power | 10 kW |
| Voltage options | 120 V, 30 V, 14 V |
| Dimensions (L×W×H) | 894×568×769 mm |
| Dry weight | 139 kg |
| Fuel tank | 32.9 L |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | precleaner | — | 25 hr | find | |
| Fuel filter | unique Electronic Fuel Injection (EFI) fuel filter | — | 200 hr | find | |
| Oil filter | — | 200 hr | find | ||
| Oil | — | 100 hr |
Common questions
What is the power rating of the Kohler PRO 12.3 EFI?
The Kohler PRO 12.3 EFI is rated 10 kW standby (10500.0 kVA).
What fuel does the Kohler PRO 12.3 EFI use?
The Kohler PRO 12.3 EFI runs on gasoline.
Troubleshooting
27Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| No AC output | Circuit breaker in OFF position. | Switch circuit breaker to ON. |
| Engine not operating at rated RPM | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. | |
| Circuit breaker or receptacles faulty | Test for voltage at circuit breaker and receptacles. | |
| Stator is faulty | Test for voltage and resistance. | |
| Alternator can't output rated power | Engine not operating at rated RPM. | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. |
| Overload condition | Calculate electrical power required by electric appliances (in watts). Reduce total wattage of connected electric devices within application range. | |
| Appliance is faulty | Repair faulty appliance. | |
| Alternator excitation failure | Engine not operating at rated RPM. | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. |
| Faulty capacitor | Check and replace. | |
| Faulty windings | Check windings resistance. | |
| High no load voltage | Engine not operating at rated RPM. | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. |
| High capacity of capacitor | Check and replace. | |
| Low no load voltage | Engine not operating at rated RPM. | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. |
| Faulty rotor diodes | Check and replace. | |
| Worn windings | Check windings resistance. | |
| Low capacity of capacitor | Check and replace. | |
| Proper voltage at no load but low voltage at load | Engine not operating at rated RPM. | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. |
| Short-circuited rotor diodes | Check and replace. | |
| Proper voltage in no load conditions but high voltage at load | Engine not operating at rated RPM. | Adjust engine running at normal operating temperature to 3600 ± 100 RPM. |
| Unstable voltage | Loose contacts. | Check connections. |
| Uneven rotation | Check for uniform rotation speed. | |
| Noisy alternator | Worn bearings. | Replace. |
| Resistance value of stator winding out of specification or resistance to ground measured | Replace stator | |
| Meter will not measure μF value of capacitor | Use an analog or digital ohmmeter to verify if capacitor will charge and discharge. If meter maintains reading indicating open circuit, replace capacitor. If meter goes to very low value and stays there, the capacitor is short circuited and should be replaced. | |
| No output from unit after flashing exciter winding | Apply a small amount of load to unit. If output occurs, let unit run for a while. If no output, rotor may not hold residual magnetism and may need replacement. | |
| Alternator can’t output rated power | Verify engine speed at full load is 3600 RPM. Take a current reading of all loads, reduce if exceeding generator rating. Use a load bank and apply load while monitoring output voltage. | |
| Engine Not Starting/Running Abnormally | Engine Stopped, No Electric Current, Tripping of Circuit Breaker | Load connected to generating set during start-up Start and Stop control ON or OFF Fuel valve closed Fuel level too low Unsuitable fuel Oil level too low Clogged air cleaner Clogged fuel filter Faulty starter battery. Fuel supply blocked or leaking Blocked ventilation inlets Circuit protectors not actuated Faulty appliance supply cord Faulty electrical sockets Faulty alternator Device connected or faulty cord Overload Battery incorrectly connected Faulty MODYS Fuses (J) |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
2| Part # | Description | Qty | System | |
|---|---|---|---|---|
| WP2.0 | 2-inch water pump | 1 | Pump | PartsGeek |
| WP3.0 | 3-inch water pump | 1 | Pump | PartsGeek |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 50% |
Available documents
Brochure — GSA Product List (Kohler)Brochure — PowEquip TriFold English (Kohler)Brochure — portable chart (Kohler)Brochure — tri-fuel accessory launch uspec update (Kohler)Owner's manual — 34 590 01 (Kohler)Service manual — 34 690 01 (Kohler)