Model D21d R21 B23 B27i H37i
Manufacturer / Model Kubota Diesel Kohler 7000 Series Kohler Command Pro® CH680 Kohler Command Pro Engine
2 cyl.
Briggs & Stratton
Vanguard BIG BLOCK,
EFI, 2 cyl.
Max Power 20.9hp @3600 rpm 21 hp @3600 rpm 22.5 hp @3600 rpm 26.5 hp @3600 rpm 37 hp @3650 rpm
Displacement 719cc (43.9 cu. in.) 660cc (40.3 cu. in.) 674cc (40.3 cu. in.) 747cc (45.6 cu. in.) 993cc (60.6 cu. in.)
Max Torque (ft-lbs) 46Nm 35.9 ft lb 37.9 ft lb 39.8 ft lbs Not provided by
manufacturer
Fuel Diesel (2-D) Gasoline (unleaded) Gasoline (unleaded) Gasoline (unleaded) Gasoline (unleaded)
Fuel Capacity 17.8 litre 11.4 litre 17.8 litre 17.8 litre 35.6 litre
Cooling System Liquid and Radiator Air Air Air Air
Blade Clutch / Brake Not provided by
manufacturer
Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Cutting Width (in) Not provided by
manufacturer
R21 Belt Drive Deck (Side
Discharge): 42" & 48",
Mulching Kit available
Side Discharge: 36 to 74 in.
(91 to 188 cm), Mulch: 36 to 52 in.
(91 to 132 cm)
Side Discharge: 36 to 74 in.
(91 to 188 cm), Mulch: 36 to 52 in.
(91 to 132 cm)
Rear Discharge: 52", 64" Rear Discharge: 52", 64"
Side Discharge Only: 56" Side Discharge: 52"1, 56"1,
60", 62"1, 74"1
Side Discharge: 48"1, 52"1,
56"1, 60", 62"1, 74"1
Mulch: 52" Mulch: 52"1, 60". 1 Requires
a deck Arm Adapter Kit
(P/N2430-10)
Mulch: 48"1, 52", 60". 1
Requires a deck Arm Adapter Kit
(P/N2430-10)
GHS Blower/ Catcher size No GHS Option No GHS Option No GHS Option No GHS Option No GHS Option
Drive tyres 18 x 8.50-10 18 x 8.50-10 22 x 10.50-12

Dimensions (cm)

Outside Dimensions
(h/w/l) [1]
127 H x 99 W x
164 L [1]
107 H x 140 W x
236 L [1]
100 H x 125 W x
230 L [1]
119 H x 168 W x
272 L [1]
119 H x 168 W x
275 L [1]

Curb Weight (approximate kg)

SD Tractor Only 435 183 277 277 353
Tractor and Mower [1] 534 [1] 260 [1] 385 [1] 385 [1] 552 [1]

[1] Dimensions and tractor and mower weight shown for GHS model with 42″ deck (typical), subtract 7″ height for SD model, 42 ” deck weight = 78kg, deck weights range from 68 to 177 kg for 36″ deck and 74″ deck respectively

NB: The information given here is accurate at time of writing. Our products are constantly being refined so it remains your responsibility to check details before making any decisions based on this information.