The Kubota JB18 tractor engine horsepower found is 18 hp. PTO horsepower found is also 18.2 hp.
Engine HP18 hp
PTO HP18.2 hp
Power / weight13.8 hp per 1,000 lb
Kubota JB18 Horsepower Specs
Engine horsepower
18 hp
PTO horsepower
18.2 hp
Rated engine RPM
2,600 rpm
Engine torque
24 lb-ft (32 Nm)
Engine displacement
61 cu in (1 L)
Engine cylinders
3 cylinders
Engine
Kubota 1.0L
Operating weight
1,301 lb (590 kg)
Power-to-weight
13.8 hp per 1,000 lb
Horsepower class
subcompact / small compact tractor horsepower
Horsepower Benchmarks
Engine horsepower benchmark
This model
18 hp
Average
32 hp
Low
16 hp
High
60 hp
PTO horsepower benchmark
This model
18.2 hp
Average
25 hp
Low
12 hp
High
50 hp
Operating weight benchmark
This model
1,301 lb
Average
2,500 lb
Low
1,300 lb
High
4,500 lb
Power-to-weight benchmark
This model
13.8 hp/1k lb
Average
14 hp/1k lb
Low
8 hp/1k lb
High
25 hp/1k lb
Benchmarks are general reference ranges for compact tractors.
Kubota JB18 Horsepower FAQ
Engine horsepower
The Kubota JB18 tractor engine horsepower found is 18 hp. Use engine horsepower for comparing engine output, not necessarily implement power at the PTO.
PTO horsepower
The PTO horsepower found for the Kubota JB18 is 18.2 hp. Confirm this against the operator manual because PTO output is often lower than engine horsepower.
Horsepower class
The Kubota JB18 is listed as subcompact / small compact tractor horsepower based on the engine horsepower found.
Rated engine RPM
The rated engine speed found for the Kubota JB18 is 2,600 rpm. This is the engine speed used for the listed power rating.
Engine torque
The engine torque found for the Kubota JB18 is 24 lb-ft (32 Nm). Torque helps describe low-speed pulling feel, while horsepower describes power output over engine speed.
Engine specs found
Engine specs found for the Kubota JB18 include Kubota 1.0L, 61 cu in (1 L) displacement, and 3 cylinders.
Operating weight
The operating weight found for the Kubota JB18 is 1,301 lb (590 kg). Weight matters because the same horsepower feels different in a light mower than in a heavy tractor.
Power-to-weight
The calculated power-to-weight figure for the Kubota JB18 is 13.8 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
When comparing the Kubota JB18, use 18 hp as the headline engine figure and double-check the PTO rating before sizing implements.
Official information note
Mistakes do happen. Check the operator manual, service manual and official kubotausa.com website for official horsepower, PTO horsepower, engine RPM, torque and operating-weight specifications before buying implements or servicing the machine.
