The Cummins/Onan GTA8.3 engine line groups 3 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 100-025-001 | Air Filter | Air filter |
| 100-029-001 | AIR FILTER | Air filter |
| 100-028-001 | Coolant Filter | Belt |
| V2-78 | 400 VF (Vari-Fuel) Bullet Valve | Bullet valve |
| WF2070 | Coolant Filter | Coolant filter |
| WF2071 | Coolant | Coolant filter |
| WF2072 | Coolant Filter | Coolant filter |
| WF2073 | Coolant Filter | Coolant filter |
| WF2074 | Coolant | Coolant filter |
| WF2076 | Coolant | Coolant filter |
| WF2075 | DCA4™ Filter(s) | Filter |
| 155-3219 | Gasket, Muffler | Gasket |
| 502-0942 | Elbow - 90 ° | Hose |
| 502-0943 | Connector, Hose (3/8 x 5/8) - GGKB, GGKC | Hose |
| 503-0098 | Hose, Oil Drain - Bulk (Order By The Foot - 3 Feet Required) | Hose |
| 503-0183 | Clamp, Hose | Hose |
| 503-0197 | Clip, Hose | Hose |
| 503-0386 | Hose, Engine Coolant - Bulk (Order By The Foot - 4 Feet Required) | Hose |
| 518-0548-02 | Clamp, Hose | Hose |
| 100-026-001 | Filling valve (optional: without filling hoses) | Oil filter |
| 100-027-001 | Concentric suction/pressure valve (optional: without filling hoses) | Oil filter |
| 100-030-001 | Oil Filter | Oil filter |
| 309-0159 | Switch, Oil Pressure (S107) | Oil filter |
| 3375048 | Oil Filter Wrench. | Oil filter |
| 10113858 | Op Meter Carrying Case. | Service part / kit |
| 102-1448-02 | Adapter, Oil Drain (M10 x 16) | Service part / kit |
| 155-2062-13 | Cap, Rain | Service part / kit |
| 155-2305 | Clamp, Muffler | Service part / kit |
| 155-2570 | Clamp, V-Band | Service part / kit |
| 155-3150-02 | Muffler | Service part / kit |
| 155-3163-01 | Adapter, Exhaust | Service part / kit |
| 155-3164-03 | Pipe, Exhaust | Service part / kit |
| 155-3180 | Shield, Rain | Service part / kit |
| 332-2634 | Clamp, Hose | Service part / kit |
| 332-3196 | Clamp, J | Service part / kit |
| 3375208 | Cummins DCA coolant test kit | Service part / kit |
| 3394430 | GTA8.3 Irrigation Panel Assy. (5 Gauge Panel) | Service part / kit |
| 3395077 | Digital Thermometer 450 AET Type E. | Service part / kit |
| 416-0619 | Cable, Battery | Service part / kit |
| 416-1000 | Cable, Battery | Service part / kit |
| 504-0011 | Valve, Shutoff (1/2”) | Service part / kit |
| 505-0050 | Elbow, Street (1/2' x 90 ° ) | Service part / kit |
| 505-0057 | Plug, Square Head (1/8') | Service part / kit |
| 505-0185 | Nipple, Half (1/2' x 1.5' lg) | Service part / kit |
| 525-0304 | Gallon Can | Service part / kit |
| 525-0305 | 12 oz. Pressurized Spray Can | Service part / kit |
| 525-0306 | Quart Can | Service part / kit |
| 526-2140 | Washer, Flat (M12) | Service part / kit |
| 60110001 | Compression Tester. | Service part / kit |
| 60210006 | Pliers for Ignition Wire Crimping. | Service part / kit |
| 60810002 | Set of Feeler Gauges. | Service part / kit |
| 61210002 | Tachometer Hand Held. | Service part / kit |
| 800-2058 | Screw, Cap - Hex Head (M8 x 1.25 x 25) | Service part / kit |
| 800-2111 | Screw, Cap - Hex Head (M12 x 1.25 x 25mm) | Service part / kit |
| 821-6003-02 | Screw, Cap - Hex Head (M8 x 1.25 x 25mm) | Service part / kit |
| 850-2008 | Washer, Lock (M8) | Service part / kit |
| 856-0013 | Washer, Lock - W/EIT (1/2) | Service part / kit |
| 91372621 | Oo Meter. | Service part / kit |
| 91400202 | Carrying Case Digital Manometer (Each) | Service part / kit |
| 91400203 | Digital Manometer 0 to 30 psi. | Service part / kit |
| 91400204 | Digital Manometer 0 to 19.99 WC. | Service part / kit |
| 91400205 | Hand Held Digital Thermometer with Case. | Service part / kit |
| 91400206 | Laser Heat Gun & Carrying Case. | Service part / kit |
| 91400207 | Volt Meter & Hertz Meter. | Service part / kit |
| 91400208 | Timing Light | Service part / kit |
| 91400210 | Carrying Case Small. | Service part / kit |
| 91400211 | Digital Manometer 0 to 199.9 WC. | Service part / kit |
| 91400809 | Carrying Case Large. | Service part / kit |
| 971400039 | Fitting 1/8 npt Thermocouple ( Each). | Service part / kit |
| 193-0432 | Sender, Oil Temperature (S2 Engine Block, E4 Oil Pan) | Sensor |
| 309-0269 | Sender, Temperature-Lo Engine | Sensor |
| 3395076 | Spark Plug Removal 5/8”. | Spark plug |
| S971KA | Snap-On P.N. S971KA magnetic spark plug socket | Spark plug |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.