The Kubota B1181 coolant capacity is listed as 1.65 gal (6.2 L). It also lists coolant type ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible and antifreeze mix 50/50 coolant and water mix.
Kubota B1181 Coolant Capacity
| Coolant capacity | 1.65 gal (6.2 L) |
|---|---|
| Cooling system capacity | 1.59 gal (6 L) |
| Radiator capacity | 1.65 gal (6.2 L) |
| Coolant type | ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible |
| Antifreeze mix | 50/50 coolant and water mix |
| Coolant change interval | every 700 hours |
| Engine horsepower | 17.4 hp (13 kW) |
| Engine displacement | 0.8 L (48.8 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Engine displacement comparison
Kubota B1181 Coolant and Engine Notes
| Coolant capacity note | The Kubota B1181 coolant spec points to 1.65 gal (6.2 L). Do not rely on the radiator-only amount if the full cooling-system capacity is available |
|---|---|
| Radiator capacity note | For the Kubota B1181, the captured radiator capacity is 1.65 gal (6.2 L). If you are doing a full drain, check the full cooling-system capacity too |
| Coolant type note | For the Kubota B1181, coolant type matters as much as capacity. The clean captured value is ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible |
| Antifreeze mix note | For the Kubota B1181, the captured mix is 50/50 coolant and water mix. Straight water is not the right long-term answer unless you are only flushing the system |
| Coolant change interval note | Coolant service for the Kubota B1181 is listed as every 700 hours. If the service history is unknown, a fresh drain and refill is usually the cleaner move |
| Engine context note | Engine context for the Kubota B1181: engine horsepower 17.4 hp (13 kW) and displacement 0.8 L (48.8 cu in). Engine size helps explain why coolant capacity changes between models |
| Refill note | The practical service move for the Kubota B1181: buy enough coolant for 1.65 gal (6.2 L), fill to spec, run the engine, then recheck the radiator and overflow bottle after cooling |
Kubota B1181 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota B1181?
The Kubota B1181 cooling system capacity is shown as 1.65 gal (6.2 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota B1181?
Use ethylene glycol-based coolant, Kubota Genuine Coolant, and ASTM D3306 compatible. The blunt rule is simple: match the manual’s coolant spec and do not mix unknown coolant formulas.
Should I use straight water in the Kubota B1181?
Not for normal long-term use. The Kubota B1181 should use 50/50 coolant and water mix or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Kubota B1181?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota B1181 is every 700 hours.
Why does the Kubota B1181 coolant amount differ from other models?
Coolant capacity changes with engine and radiator setup. For the Kubota B1181, the supporting engine data is horsepower 17.4 hp (13 kW) and displacement 0.8 L (48.8 cu in).
Mistakes do happen. Tractor coolant specs can change by year, market, engine, radiator, cab/heater setup and service procedure. Please check the operator manual, decal information and official kubotausa.com website for official information before draining or refilling the cooling system.
