The Kubota ZD331 machine engine horsepower found is 31 hp. PTO horsepower found is also 31 hp.
Engine HP31 hp
PTO HP31 hp
Power / weight17.5 hp per 1,000 lb
Kubota ZD331 Horsepower Specs
Engine horsepower
31 hp
PTO horsepower
31 hp
Rated engine RPM
3,200 rpm
Engine displacement
76.9 cu in (1.3 L)
Engine cylinders
3 cylinders
Engine
Kubota 1262cc
Operating weight
1,770 lb (803 kg)
Power-to-weight
17.5 hp per 1,000 lb
Horsepower class
high-power mower / garden tractor
Horsepower Benchmarks
Engine horsepower benchmark
This model
31 hp
Average
23 hp
Low
12 hp
High
40 hp
PTO horsepower benchmark
This model
31 hp
Average
18 hp
Low
8 hp
High
35 hp
Operating weight benchmark
This model
1,770 lb
Average
1,200 lb
Low
500 lb
High
2,600 lb
Power-to-weight benchmark
This model
17.5 hp/1k lb
Average
20 hp/1k lb
Low
12 hp/1k lb
High
35 hp/1k lb
Benchmarks are general reference ranges for lawn and garden tractors and mowers.
Kubota ZD331 Horsepower FAQ
Engine horsepower
The Kubota ZD331 machine engine horsepower found is 31 hp. Use engine horsepower for comparing engine output, not necessarily implement power at the PTO.
PTO horsepower
The PTO horsepower found for the Kubota ZD331 is 31 hp. Confirm this against the operator manual because PTO output is often lower than engine horsepower.
Horsepower class
The Kubota ZD331 is listed as high-power mower / garden tractor based on the engine horsepower found.
Rated engine RPM
The rated engine speed found for the Kubota ZD331 is 3,200 rpm. This is the engine speed used for the listed power rating.
Engine specs found
Engine specs found for the Kubota ZD331 include Kubota 1262cc, 76.9 cu in (1.3 L) displacement, and 3 cylinders.
Operating weight
The operating weight found for the Kubota ZD331 is 1,770 lb (803 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 ZD331 is 17.5 hp per 1,000 lb based on the engine horsepower and operating weight found.
Horsepower planning note
When comparing the Kubota ZD331, use 31 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.
