The Kubota G1800 coolant capacity is listed as 1.59 gal (6 L). It also lists coolant type ethylene glycol-based coolant and ASTM D3306 compatible and antifreeze mix 50/50 coolant and water mix.
Kubota G1800 Coolant Capacity
| Cooling system capacity | 1.59 gal (6 L) |
|---|---|
| Coolant type | ethylene glycol-based coolant and ASTM D3306 compatible |
| Antifreeze mix | 50/50 coolant and water mix |
| Engine model | D662 |
| Engine horsepower | 16 hp (11.9 kW) |
| Engine displacement | 0.7 L (40 cu in) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Engine displacement comparison
Kubota G1800 Coolant and Engine Notes
| Coolant capacity note | For service planning, the Kubota G1800 should be treated as 1.59 gal (6 L) coolant capacity. That is a compact tractor cooling system where a normal premixed coolant jug may cover most of the refill |
|---|---|
| Coolant type note | The captured coolant type for the Kubota G1800 is ethylene glycol-based coolant and ASTM D3306 compatible. Do not mix unknown coolant types unless the label and manual say they are compatible |
| Antifreeze mix note | For the Kubota G1800, 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 |
| Engine context note | Engine context for the Kubota G1800: engine model D662, engine horsepower 16 hp (11.9 kW), and displacement 0.7 L (40 cu in). Engine size helps explain why coolant capacity changes between models |
| Refill note | For a coolant change on the Kubota G1800, do not just dump in coolant and walk away. Fill slowly, run it up to temperature, cool it down and top up as needed |
Kubota G1800 Coolant Capacity FAQ
How much coolant does the Kubota G1800 take?
The main coolant amount captured for the Kubota G1800 is 1.59 gal (6 L). Buy a little extra so you can top up after the engine warms up and cools down.
Does coolant type matter on the Kubota G1800?
Yes. Capacity tells you how much to buy; coolant type tells you what to buy. For the Kubota G1800, the captured coolant type is ethylene glycol-based coolant and ASTM D3306 compatible.
What antifreeze mix does the Kubota G1800 use?
The captured antifreeze mix for the Kubota G1800 is 50/50 coolant and water mix. A 50/50-style mix is the common practical answer unless your manual or climate calls for something different.
When should the Kubota G1800 coolant be replaced?
Use the service interval in the operator manual as the service guide. Coolant can look okay but still lose corrosion protection over time.
What engine specs affect Kubota G1800 coolant capacity?
The captured engine context is engine model D662, horsepower 16 hp (11.9 kW), and displacement 0.7 L (40 cu in). Engine size is one reason coolant capacity changes between tractors.
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.
