Greensmaster Flex-21
Engine

Kawasaki®, 4-cycle, 3.7 hp (2.7 kW), air-cooled OHV engine, 3600 rpm. Displacement: 7.57 cu in. (124 cc). Cast iron cylinder sleeve. Electronic ignition. Maximum noise suppression muffler. 83 dB(A) at operator’s ear.
Fuel Capacity
2.64 quarts (2.5 liters) regular grade unleaded gasoline.
Gearbox Drive
Traction: Integral gearbox assembly directly mounted to the engine. The traction drive consists of a constant mesh planetary gear reduction incorporating a wet bath band-type clutch and brake driving a Peerless® differential assembly integrated into the gearbox assembly. Positive drive belt to traction drum. Implement: Consistent mesh gear driven countershaft with integral cone wet clutch. Drive shaft consists of two stainless steel beam couplings for angular misalignment combined with a molybdenum disulfide nylon extension member to accommodate axial movement. Positive drive belt to reel.
Maintenance
No grease zerks, sealed bearing design eliminates daily maintenance.
Ground Speed
Mowing speed: 1.3-3.5 mph (2.1-5.6 km/h). Transport speed (maximum): 5.3 mph (8.5 km/h).
Traction Drum
Dual cast aluminum, 7.5" (19 cm) diameter, tapered on outer 1/3 of length.
Controls
Engine mounted: on/off switch, recoil starter, choke. Handle mounted: throttle lever, dual function traction/reel control lever, service/park brake lever. Safety devices: neutral interlock system, servicing/park brake, enclosed drive system.
Handle
Loop style, 1" (2.5 cm) diameter with easy pull pin height adjustment, operator selected.
Transport Tires/ Kickstand
Two quick detachable pneumatic tires; 3.00 x 3.25-6" (8.25 cm) tread width. Kickstand standard equipment.
Reel Construction
5" (12.7 cm) diameter, 11 blades (high-strength, low-alloy steel, through hardened, impact resistant).
Suspension
Semi-floating cutting unit separable from drive unit, pivoting around reel centerline (pitch axis) and pivoting around bedknife centerline side to side (roll axis).
Width of Cut
21" (53.3 cm).
Height of Cut
1/16-19/64" (1.5-7.5 mm).
Clip Frequency
11-Blade/Standard: .16 (4.1 mm), 11-blade w/clip kit: .14" or .21" (3.5 mm or 6.4 mm).
Construction
Extruded aluminum mainframe with cast aluminum side plates.
Cutting Unit
Adjustments/ Service
Cutting unit detachable from traction unit. Dual screw adjustments to reel. Front roller height of cut adjustment with rear roller eccentric leveling. Sealed reel bearings utilizing multi-lip canister seals.
Bedknife
Bedknife is high carbon through-hardened steel. Tournament Bedknife standard.
Grass Basket
Molded polyethylene with integrated graphics highlighting overlap guidelines, vented for high-efficiency collection.
Rollers
Front Roller: Aluminum Wiehle 2.5" (6.35 cm) diameter with sealed bearings and multi-lip seals standard. Rear Roller: Aluminum full roller 2" (5.1 cm) diameter with sealed bearings and multi-lip seals standard.
Dry Weight
238 lbs. (108 kg) with aluminum Wiehle roller, kickstand and grass basket; without transport tires and groomer.
Warranty
Two year limited warranty. Refer to the Operator’s Manual for further details.