The Kubota D1503-K3A is a 1.5 L 3-cylinder swirl chamber engine rated at 1500 rpm, producing up to 11.5 kW. It powers generator sets from Airman and Kubota, including the SDG13LX-5B1N and SDG13LX-581. It holds 6.5 L (1.7 gal) of oil and 5.7 L (1.5 gal) of coolant.
Also known as: KUBOTA D1503-K3A
Part of the Kubota D1503 engine family — 2 variants share parts & fitment.
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
| Oil capacity | 6.5 L |
|---|---|
| Coolant capacity | 5.7 L |
| Displacement | 1.499 L |
| Cylinders | 3 |
| Aspiration | Swirl chamber |
| Rated speed | 1500 rpm |
| Gross power | 11 kW |
Shared across brands: Airman, Kubota
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Element | — | 1000 hr | ||
| Fuel filter | Fuel Filter | — | 500 hr | ||
| Oil filter | Oil Filter | 87415600 | 500 hr | Amazon eBay $14.99 PartsGeek $8.98 KuduParts $18.00 | |
| Battery | Battery | — | 2000 hr | ||
| Belt | 95D31Rx1 | — | |||
| Oil | Engine Oil | 6.5 L | — | 250 hr | |
| Spark plug | 95D31Rx1 | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 1509001 | JQA-0581 | other_service |
| 80D26Rx1 | Engine Oil | other_service |
| JQA-EM4670 | ISO14001 | other_service |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Kubota D1503-K3A engine has an oil capacity of 6.5 liters.
The Kubota D1503-K3A has a displacement of 1.499 liters with 3 cylinders.
The Kubota D1503-K3A powers 2 generator set(s), including Airman SDG13LX-5B1N, Kubota SDG13LX-581.
The Kubota D1503-K3A uses oil filter part numbers Kubota 87415600, Donaldson P550939, Wix 51307.
The Kubota D1503-K3A uses fuel filter part numbers Kubota 607, Donaldson P502161, Wix 33507.
The Kubota D1503-K3A uses air filter part numbers Kubota RG64842831, Kubota R141142289, Donaldson P821575.
The Kubota D1503-K3A oil change interval is every 250 hours.