The Kohler 1903M is a 2.5 L 4-cylinder liquid cooling engine rated at 2600 rpm, producing up to 88 kW. It powers generator sets from Kohler, including the 1903 M.
Also known as: KDI 1903M
Part of the Kohler KDI1903 engine family — 8 variants share parts & fitment.
| Displacement | 2.5 L |
|---|---|
| Cylinders | 4 |
| Aspiration | Liquid cooling |
| Rated speed | 2600 rpm |
| Gross power | 88 kW |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | 24 hr | |||
| Oil filter | — | 36 hr | |||
| Belt | Mech-Rotary pump | — | 36 hr | ||
| Coolant | 500.0 mth | — | |||
| Oil | std/synthetic | 500.0 mth | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| oil | Change | 500 hr | Minimum 500 hours oil change interval |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | No 1 Diesel (US) - ASTM D 975-09 B - Grade 1-D S 15 and No 2 Diesel (US) - ASTM D 975-09 B - Grade 2-D S 15, S 500 for mechanical models only | ASTM D 975-09 B |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 100-025-000 | Air Filter | Air filter |
| 401-2567 | Cartridge dry-type air filter | Air filter |
| A-226955 | Air cleaner assembly | Air filter |
| ED161816 | KDI AIR FILTER DONALDSON 7” WITH SAFETY CARTRIDGE | Air filter |
| GM16944 | Element, air cleaner | Air filter |
| GM66601 | Element, Inner | Air filter |
| 100-075-000 | Belt | Belt |
| 401-2571 | Alternator belt (standard alternator) | Belt |
| 401-2572 | Poly-V alternator belt (heavy environmental condition) | Belt |
| 401-2573 | Poly-V alternator belt (standard condition) | Belt |
| 100-060-000 | Coolant Filter | Coolant filter |
| 401-2574 | Coolant (OAT) | Fluid |
| 401-2575 | Coolant (HOAT) | Fluid |
| 100-045-000 | Fuel Filter | Fuel filter |
| ED161817 | KIT FUEL FEEDING PUMP WITH PRE-FILTER | Fuel filter |
| ED161820 | KIT SECONDARY FEUL FILTER (WIF+CS+HEATER) | Fuel filter |
| ED0082051340-S | COV.HEAD GASK.-OR SET 1903 TCR | Gasket |
| ED0082051360-S | COV.HEAD GASK.-OR SET 1903 M | Gasket |
| ED161746 | KIT AIR GRID HEATER + GASKETS (FOR LOW TEMPERATURES) | Gasket |
| 401-2568 | Intake manifold hose (air filter - intake manifold) | Hose |
| 401-2569 | Coolant hoses | Hose |
| 401-2570 | Fuel line hose | Hose |
| GM22310 | Hose, Reducer | Hose |
| GM88850 | Hose, Air Intake (Item 5) | Hose |
| 100-030-000 | Oil Filter | Oil filter |
| ED161799 | KIT REMOTE OIL FILTER (KDI 1903TCR ONLY) | Oil filter |
| 401-2576 | ATS (Engine) | Service part / kit |
| ED0053029490 | 2.5 Blue smoke | Service part / kit |
| ED0072455190 | CONTROL PANEL KDI-TCR STAGE V | Service part / kit |
| ED161789 | KIT CAB HEATER PROVISION | Service part / kit |
| ED161815 | KDI M - VEHICLE WIREHARNESS | Service part / kit |
| ED161818 | KDI COUNTER CONNECTOR ACCESSORIES | Service part / kit |
| ED161821 | KDI TCR VEHICLE HARNESS (2186-499) | Service part / kit |
| ED161822 | KDI BATTERY HARNESS (2186-406) | Service part / kit |
| ED161823 | KIT THROTTLE CONTROL PEDAL + COUNTER CONNECTOR | Service part / kit |
| ED161824 | KIT THROTTLE CONTROL KNOB + COUNTER CONNECTOR | Service part / kit |
| ED161825 | KIT THROTTLE CONTROL LEVER + COUNTER CONNECTOR | Service part / kit |
| 273377 | Gauge, restriction | Sensor |
| ED161819 | KIT COUNTER CONNECTOR WATER IN FEUL SENSOR | Sensor |
| 100-090-000 | Spark Plug | Spark plug |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Kohler 1903M has a displacement of 2.5 liters with 4 cylinders.
The Kohler 1903M powers 1 generator set(s), including Kohler 1903 M.