Quick answer:
The Kubota B5100 tractor fuel tank capacity found is 2.1 gal (7.9 L). Fuel type is diesel.
Fuel tank2.1 gal (7.9 L)
Fuel typediesel
5-gal cansone 5-gal can
Full fuel weightabout 15 lb (7 kg) of diesel
Kubota B5100 Fuel Tank Specs
| Fuel tank capacity | 2.1 gal (7.9 L) |
|---|---|
| Fuel type | diesel |
| Engine | 0.5L 2-cylinder |
| Engine horsepower | 12 hp |
| Engine displacement | 31.1 cu in (0.51 L) |
| Fuel capacity per horsepower | 0.18 gal per hp |
| Fuel tank size class | small compact-tractor fuel tank |
| 5-gallon fuel cans | one 5-gal can |
| 10-litre fuel jugs | one 10-L jug |
| Estimated full tank fuel weight | about 15 lb (7 kg) of diesel |
Fuel Tank Benchmarks
Fuel tank capacity benchmark
Engine horsepower benchmark
Fuel per horsepower benchmark
Benchmarks are general reference ranges for compact tractors.
Kubota B5100 Fuel Tank FAQ
| Fuel tank capacity | The Kubota B5100 tractor holds 2.1 gallons, which is about 7.9 litres. Use that as the refill figure when planning diesel storage, fuel cans or workshop servicing. |
|---|---|
| Fuel type | The fuel type found for the Kubota B5100 tractor is diesel. Match the fuel type to the operator manual and the engine fitted to your exact model. |
| Fuel tank size class | The Kubota B5100 is listed as having a small compact-tractor fuel tank based on the fuel tank capacity found. |
| Fuel cans needed from empty | From empty, the Kubota B5100 needs one 5-gal can or one 10-L jug to cover a full refill. |
| Estimated full tank fuel weight | A full tank on the Kubota B5100 adds about 15 lb (7 kg) of diesel before allowing for the tank itself. |
| Engine specs found | Engine specs found for the Kubota B5100 include 0.5L 2-cylinder, 12 hp, 31.1 cu in (0.51 L). |
| Fuel capacity per horsepower | The fuel capacity per horsepower for the Kubota B5100 is 0.18 gal per hp based on the fuel tank and engine horsepower figures found. |
| Fuel refill planning note | Plan around roughly 2.1 gal of fuel for a full refill. This is best treated as a short-job or frequent-refill tank. Tank class: small compact-tractor fuel tank. Fuel type: diesel. |
Official information note
Mistakes do happen. Check the operator manual, service manual and official kubotausa.com website for official fuel capacity specifications before refuelling, servicing or buying parts.

