Model R21 MB18 MB23i
MH27i MH37i MH24d
Manufacturer / Model Kohler 7000 Series Briggs & Stratton
Vanguard, 2 cyl.
Kohler Command Pro
ECH730 EFI, 2 cyl.
Kohler ECH749 EFI,
2 cyl.
Briggs & Stratton
Vanguard BIG BLOCK,
EFI, 2 cyl.
Kohler KDW1003
Max Power 21 hp @3600 rpm 18 hp @3600 rpm 23 hp @3600 rpm 26.5 hp @3600 rpm 37 hp @3650 rpm 23.7 hp @3600 rpm
Displacement 660cc (40.3 cu. in.) 570cc (34.8 cu. in.) 747cc (45.6 cu. in.) 747cc (45.6 cu. in.) 993cc (60.6 cu. in.) 1028cc (62.7 cu in)
Max Torque (ft-lbs) 35.9 ft lb 29.5 ft lbs 38.1 ft lbs 40 ft lbs Not provided by
manufacturer
36.8 ft lbs
Fuel Gasoline (unleaded) Gasoline (unleaded) Gasoline (unleaded) Gasoline (unleaded) Gasoline (unleaded) Diesel (2-D)
Fuel Capacity 11.4 litre 15.1 litre 17.8 litre 35.6 litre 35.6 litre 35.6 litre
Cooling System Air Air Air Air Air Liquid, Radiator
Blade Clutch / Brake Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Manual Belt Tightener /
Band Brake
Cutting Width (in) R21 Belt Drive Deck (Side
Discharge): 42" & 48",
Mulching Kit available
Combo Deck (Side
Discharge / Mulch): 36",
42" & 48"
36” to 56” Side Discharge Rear Discharge: 52", 64" Rear Discharge: 52", 64" Rear Discharge: 52", 64"
Side Discharge Only: 56" 36” to 52” Mulching Side Discharge: 48"1, 52"1,
56"1, 60", 62"1, 74"1
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: 48"1, 52", 601. 1
Requires a deck Arm Adapter
Kit (P/N2430-10)
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 No GHS Option
Drive tyres 18 x 8.50-10 18 x 8.50-10 22 x 10.50-12 22 x 10.50-12 22 x 10.50-12

Dimensions (cm)

Outside Dimensions
(h/w/l) [1]
107 H x 140 W x
236 L [1]
101 H x 125 W x
231 L [1]
101 H x 125 W x
231 L [1]
119 H x 168 W x
272 L [1]
119 H x 168 W x
275 L [1]
129 H x 168 W x
272 L [1]

Curb Weight (approximate kg)

SD Tractor Only 183 260 269 342 353 453
Tractor and Mower [1] 260 [1] 353 [1] 363 [1] 552 [1] 552 [1] 651 [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.