Service parts for the K450
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Regular automobile gasoline |
|---|---|
| Frequency | 60.0 Hz |
| Oil capacity | 2.1 L |
| Voltage options | 120 V |
| Phase | single |
| Rated current | 420 A |
| Power factor | 100 |
| Coolant capacity | 3.2 L |
| Dimensions (L×W×H) | 440×320×414 mm |
| Dry weight | 26 kg |
| Fuel tank | 2.1 L |
Maintenance & consumables
for the GS130-DG-A-2-3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Cleaner | M-1538 | Amazon eBay |
Service intervals
2| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine oil | Change | 50 hr | First service — First oil change after 10 hours operation | |
| Air cleaner element | Replace | 12 mo | Every six cleanings or every year |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Crankshaft side clearance | 0.02-0.1 | mm | reference; allowable limit 0.2 mm |
| Clearance | Cylinder bore | 42.000-42.025 | mm | reference; allowable limit 42.2 mm |
| Clearance | Cylinder bore | 60.00-60.02 | mm | reference; allowable limit 60.12 mm |
| Clearance | Cylinder bore | 67.000-67.025 | mm | reference; allowable limit 67.2 mm |
| Clearance | Cylinder bore | 71.98-72.00 | mm | reference; allowable limit 72.2 mm |
| Clearance | Cylinder bore | 73.00-73.02 | mm | reference; allowable limit 73.12 mm |
| Clearance | Cylinder head surface distortion allowable limit | 0.4 | mm | max; also 0.0157 in |
| Clearance | Gear backlash | 0.023-0.128 | mm | reference; allowable limit 0.2 mm |
| Clearance | Gear backlash | 0.029-0.123 | mm | reference; allowable limit 0.2 mm |
| Clearance | Gear backlash | 0.03-0.12 | mm | reference; allowable limit 0.2 mm |
| Clearance | Gear backlash | 0.033-0.119 | mm | reference; allowable limit 0.2 mm |
| Clearance | Gear backlash | 0.033-0.135 | mm | reference; allowable limit 0.2 mm |
| Clearance | Piston pin to connecting rod small-end bore | 0.010-0.025 | mm | reference; allowable limit 0.1 mm |
| Clearance | Piston pin to connecting rod small-end bore | 0.010-0.033 | mm | reference; allowable limit 0.1 mm |
| Clearance | Piston pin to connecting rod small-end bore | 0.015-0.030 | mm | reference; allowable limit 0.1 mm |
| Clearance | Piston pin to connecting rod small-end bore | 0.026-0.046 | mm | reference; allowable limit 0.08 mm |
| Clearance | Piston ring gap | 0.15-0.35 | mm | top/2nd ring; oil ring 0.15-0.35 mm; allowable limit 0.5 mm |
| Clearance | Piston ring gap | 0.2-0.4 | mm | top/2nd ring; oil ring 0.2-0.4 mm; allowable limit 0.9 mm |
| Clearance | Piston ring gap | 0.25-0.45 | mm | top/2nd ring; oil ring 0.2-0.4 mm; allowable limit 0.9 mm |
| Clearance | Valve guide clearance exhaust | 0.050-0.095 | mm | reference; allowable limit 0.1 mm |
| Clearance | Valve guide clearance intake | 0.030-0.067 | mm | reference; allowable limit 0.1 mm |
| Clearance | Valve seat surface width | 1.0-1.3 | mm | reference; allowable limit 1.5 mm |
| Clearance | Valve spring free length | 30.8-31.3 | mm | reference; allowable limit 30.5 mm |
| Clearance | Valve spring squareness allowable limit | 1.5 | mm | allowable limit |
| Gap | Spark plug gap | 0.0236-0.0276 | in | also 0.6-0.7 mm |
| Gap | Spark plug gap | 0.0276 | in | also 0.7 mm |
| Gap | Spark plug gap | 0.0354-0.0394 | in | also 0.9-1.0 mm |
| Gap | Spark plug gap | 0.0394 | in | also 1.0 mm |
| Resistance | Rotor field coil | 13.9 | ohm | K450[K400] |
| Resistance | Rotor field coil | 45 | ohm | ±5%; K1400[K1200] |
| Resistance | Rotor field coil | 54 | ohm | ±5%; K2100[K1800] |
| Resistance | Stator main coil | 2.43 | ohm | ±5%; K450[K400] |
| Resistance | Stator sub coil | 10.5 | ohm | ±5%; K450[K400] |
| Torque | Bracket front bolt | 156.2-191.0 | lbf-in | also 180-220 kgf-cm, 17.65-21.58 N-m |
| Torque | Connecting rod bolt | 13.7-19.6 | N-m | also 1.4-2.0 kgf-m, 10.1-14.5 ft-lbs |
| Torque | Connecting rod bolt | 16.7-22.6 | N-m | also 1.7-2.3 kgf-m, 12.3-16.6 ft-lbs |
| Torque | Connecting rod bolt | 3.9-5.9 | N-m | also 0.4-0.6 kgf-m, 2.9-4.4 ft-lbs |
| Torque | Connecting rod bolt | 9.8-13.7 | N-m | also 1.0-1.4 kgf-m, 7.2-10.1 ft-lbs |
| Torque | Crankcase 2 tightening bolt | 13.7-19.6 | N-m | also 1.4-2 kgf-m, 10.1-14.5 ft-lbs |
| Torque | Crankcase 2 tightening bolt | 2.8-3 | N-m | also 0.29-0.31 kgf-m, 2.1-2.3 ft-lbs |
| Torque | Crankcase 2 tightening bolt | 7.8-12.7 | N-m | also 0.8-1.3 kgf-m, 5.6-9.4 ft-lbs |
| Torque | Cylinder head bolt | 19.6-29.4 | N-m | also 2-3 kgf-m, 14.5-21.7 ft-lbs |
| Torque | Cylinder head bolt | 34.3-39.2 | N-m | also 3.5-4 kgf-m, 25.3-29.0 ft-lbs |
| Torque | Cylinder head bolt | 34.3-46.1 | N-m | also 3.5-4.7 kgf-m, 25.3-34.0 ft-lbs |
| Torque | Drain plug | 19.6-29.4 | N-m | also 2-3 kgf-m, 14.5-21.7 ft-lbs |
| Torque | Drain plug | 6.9-9.8 | N-m | also 0.7-1 kgf-m, 5.1-7.2 ft-lbs |
| Torque | Flywheel tightening nut | 19.6-24.5 | N-m | also 2-2.5 kgf-m, 14.5-18 ft-lbs |
| Torque | Flywheel tightening nut | 29.4-44.1 | N-m | also 3-4.5 kgf-m, 21.7-32.5 ft-lbs |
| Torque | Flywheel tightening nut | 58.8-68.6 | N-m | also 6-7 kgf-m, 43.4-50.6 ft-lbs |
| Torque | Flywheel tightening nut | 63.7-73.5 | N-m | also 6.5-7.5 kgf-m, 47.0-54.2 ft-lbs |
| Torque | Output terminal nut | 16.5-21.7 | lbf-in | also 19-25 kgf-cm, 1.86-2.45 N-m |
| Torque | Rotor center bolt | 104.1-138.9 | lbf-in | also 120-160 kgf-cm, 11.77-15.69 N-m |
| Torque | Rotor center bolt | 138.9-182.3 | lbf-in | also 160-210 kgf-cm, 15.69-20.59 N-m |
| Torque | Rotor set bolt | 138.9-182.3 | lbf-in | also 160-210 kgf-cm, 15.69-20.59 N-m |
| Torque | Rotor set bolt | 277.7-381.9 | lbf-in | also 320-440 kgf-cm, 31.38-43.15 N-m |
| Torque | Spark plug | 9.8-24.5 | N-m | also 1-2.5 kgf-m, 7.2-18.1 ft-lbs |
| Torque | Stator thru bolt | 52.1-78.1 | lbf-in | also 60-90 kgf-cm, 5.88-8.83 N-m |
| Valve clearance | Valve clearance | 0.07-0.13 | mm | also 0.0028-0.0051 in |
| Valve clearance | Valve clearance | 0.08-0.14 | mm | also 0.0031-0.0055 in |
| Valve clearance | Valve clearance | 0.08-0.15 | mm | also 0.0035-0.0059 in |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Engine oil | 10W30 | API type SE, SF class engine oil | below -10°C | below 14°F (-10°C) | |
| Engine oil | SAE #20 | API type SE, SF class engine oil | -10°C to 15°C | below 59°F (+15°C) | |
| Engine oil | SAE #30 | API type SE, SF class engine oil | above 15°C | above 59°F (+15°C) | |
| Fuel | Regular automobile gasoline |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
10Adjusting Pilot Screw Opening Degree adjustment
Tools: screwdriver
- Tighten pilot screw completely
- Loosen according to reference value
Checking Valve Clearance adjustment
Tools: feeler gauge
- Set piston at top dead center
- Measure clearance with feeler gauge
- If clearance is under reference value, grind valve stem to adjust
Checking Ignition Plug Gap maintenance
Tools: feeler gauge
- Remove carbon
- Measure clearance with feeler gauge
- If clearance is out of reference value, readjust
Draining Engine Oil maintenance
Tools: wrench
- Remove dipstick
- Remove drain plug
- Drain engine oil
Removing Air Cleaner (K1400/K2100/K3000/K3500) maintenance
- Loosen air cleaner cover
- Take out air cleaner element
- Remove foam wrapper and wash in detergent and water
- Dry thoroughly
- Re-oil foam wrapper and squeeze out excess oil
- Shake and tap cartridge element to remove dust
- Install new element if still dirty
- Re-install element and cover
Removing Air Cleaner (K450/K1000/K400/K800) maintenance
Tools: screwdriver
- Remove air cleaner cover fixtures
- Remove cover, element, and plate
- Remove two air cleaner body tightening nuts
- Remove air cleaner body
Removing Flywheel repair
⚠ Do not damage fins
Tools: air-cooled engine flywheel puller
- Remove flywheel tightening nut
- Remove flywheel
- Remove woodruff key
Removing Fuel Tank and Fuel Filter repair
⚠ Gasoline fire hazard
Tools: screwdriver, wrench
- Close fuel filter cock
- Disconnect fuel pipe at carburetor side
- Loosen fuel filter tightening bolt
- Remove fuel filter from tank body
- Remove four fuel tank tightening bolts
- Remove fuel tank with filter connected
Removing Piston repair
⚠ Be careful of flywheel side direction and mark on connecting rod
Tools: wrench
- Extend bent portion of rod bolt washer
- Remove connecting rod bolt
- Remove cap at large end of connecting rod
- Pull out piston to cylinder head side
Removing Spark Plug, Cylinder Head and Head Gasket repair
⚠ Check assembling direction of gasket
Tools: wrench
- Remove spark plug
- Remove cylinder head
- Remove head gasket
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What engine is in the Cummins/Onan K450?
The Cummins/Onan K450 is powered by the GS130-DG-A-2-3 engine.
What fuel type does the Cummins/Onan K450 take?
The Cummins/Onan K450 runs on Regular automobile gasoline.
What is the cooling system capacity of the Cummins/Onan K450?
The Cummins/Onan K450 cooling system holds 3.2 liters (0.8 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the oil capacity of the Cummins/Onan K450?
The Cummins/Onan K450 has an engine oil capacity of 2.1 liters (2.2 US quarts), per the manufacturer specification sheet.
How much does the Cummins/Onan K450 weigh?
The Cummins/Onan K450 has a dry weight of 26 kg (57 lb).
What size fuel tank does the Cummins/Onan K450 have?
The Cummins/Onan K450 has a 2.1 liter (1 US gallon) fuel tank.
What voltage does the Cummins/Onan K450 produce?
The Cummins/Onan K450 is offered in 120 V, single-phase.
What air filter does the Cummins/Onan K450 use?
The Cummins/Onan K450 uses air filter part number M-1538.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Voltage indication lamp lights, but output voltage is not delivered | Switch is not at (DC, AC) position | Set the switch to the desired position. |
| Voltage indication lamp lights, but output voltage is not delivered | Disconnected main coil | Repair or replace. |
| Voltage indication lamp lights, but output voltage is not delivered | Blown fuse | Locate the cause (short circuit caused by overloaded wiring, etc.) and remove it. Then, replace fuse. |
| Voltage indication lamp lights, but output voltage is not delivered | Improper contact of receptacle | Repair or replace. |
| Voltage indication lamp lights, but output voltage is not delivered | Improper switch contact | Repair or replace. |
| Voltage indication lamp lights, but output voltage is not delivered | Disconnected wiring (rear side of control panel) | Check wiring. Repair. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan K450 troubleshooting guide (45 entries) →
Repair guides
9- Checking Ignition Plug Gap
- Checking Valve Clearance
- Draining Engine Oil
- Removing Air Cleaner (K1400/K2100/K3000/K3500)
- Removing Air Cleaner (K450/K1000/K400/K800)
- Removing Flywheel
- Removing Fuel Tank and Fuel Filter
- Removing Piston
- Removing Spark Plug, Cylinder Head and Head Gasket
Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
3| Part # | Description | Qty | System | |
|---|---|---|---|---|
| G-1193 | Recoil Starter | 1 | Recoil starter | Amazon eBay |
| M-1538 | Air Cleaner | 1 | Air filter | Amazon eBay |
| M-1658 | WARNING: Hot muffler can cause serious burns. Be careful not to touch muffler when making this adjustment. | Service part / kit | Amazon eBay |
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.
Available documents
This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.