Simplicity lawn tractors

Simplicity SunStar 20

The Simplicity SunStar 20 is a garden tractor produced from 1987 to 1997 by Simplicity in Port Washington, Wisconsin, USA. It features a 20 hp Kohler engine with two variants, a hydrostatic transmission, and a variety of attachments including mower decks, snowblowers, blades, and front-end loaders. It has a two-wheel drive with mechanical rear differential lock on earlier models, power steering, and mechanical drum brakes. The tractor offers optional rear and front PTOs and is designed with an open operator station.

Power-

Founded-

ModelSunStar 20

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Technical Specifications

Detailed specifications and technical data for Simplicity SunStar 20

Engine

Fuel tank	4.25 gal (16.1 L)
Starter 1	electric
Starter 2	electric
Rated RPM 1	3400
Rated RPM 2	3600
Sparkplug 1	Champion RV15YC
Air cleaner 1	dual element
Air cleaner 2	dual element
Bore/Stroke 1	3.125x3.063 inches (79 x 78 mm)
Bore/Stroke 2	3.03x2.64 inches (77 x 67 mm)
Compression 1	6.6:1
Displacement 1	770 cc (46.98 ci)
Displacement 2	622 cc (38 ci)
Engine options	20HP Kohler 770cc 2-cyl gasoline, 20HP Kohler 622cc 2-cyl gasoline
Oil capacity 1	1.75 qts (1.7 L)
Oil capacity 2	2 qts (1.9 L)
Engine detail 1	Kohler M20, gasoline, 2-cylinder, air-cooled horizontal-shaft opposed-twin, Full-pressure lubrication. The Kohler Magnum was used through the 1994 model year.
Engine detail 2	Kohler Command CH20S, gasoline, 2-cylinder, air-cooled horizontal-shaft opposed-twin, The Kohler Command engine was used in the SunStar 20 from 1995 through 1997.
Power (gross) 1	20 hp (14.9 kW)
Power (gross) 2	20 hp (14.9 kW)
Sparkplug gap 1	0.025 inches (0.635 mm)
Starter volts 1	12
Starter volts 2	12

Features

Drive	Two-wheel drive
Brakes	Mechanical drum brakes
Power steering	Yes
Operator station	Open operator station
Differential lock	mechanical rear (on models built from 1987 to 1994)

Variants

1920H	similar AGCO model
2920H	similar Massey Ferguson model

Dimensions

Width	38.25 inches (97 cm)
Length	78 inches (198 cm)
Weight	873 to 1108 pounds
Rear tire	23x10.5-12
Wheelbase	51 inches (129 cm)
Front tire	16x6.50-8
Weight details	873 lbs (395 kg), 1051 lbs (476 kg) with 46-inch deck, 1108 lbs (502 kg) with 60-inch deck
Height (steering wheel)	47 inches (119 cm)

Electrical

Ground	negative
Battery CCA	400
Battery volts	12
Charging amps	15
Charging system	flywheel alternator

Production

Series	SunStar Series
Built in	Port Washington, Wisconsin, USA
Category	Garden tractor
Original price	$6,549 (1990), $6,810 (1991), $7,350 (1993), $7,400 (1994), $7,700 (1996), $7,950 (1994)
Years produced	1987 - 1997

Attachments

Blade	46 inches width (116 cm), front-mount, 157 lbs (71 kg), manual-angle and hydraulic-angle (Optional), Simplicity 1691000
Additional	A 38-inch tiller was available. The tiller required a rear lift kit (1691765) and rear PTO. Tiller required the appropriate gear box for the PTO (2000 or 3400 RPM).
Snowblower	42 inches width (106 cm), single-stage, front-mount, 218 lbs (98 kg), Simplicity 1690982
Snow blower	two-stage, front-mount, 300 lbs (136 kg), Simplicity 1691360
Front-end loader	Model1691309 Loader Weight479 lbs (217 kg) Boom rod1.00 inches (2 cm) Bucket rod1.00 inches (2 cm) Dump angle41° Dump reach12.5 inches (31 cm) Bucket width38 inches (96 cm), 48 inches (121 cm) Ground reach42.5 inches (107 cm) Boom cylinder1.50 inches (3 cm) Height at pin72 inches (182 cm) Lift capacity400 lbs lift (full at pin) (181 kg) Breakout force500 lbs breakout (at pin) (226 kg) Dump clearance55 inches (139 cm) Rollback angle16° (ground line) Bucket cylinder1.50 inches (3 cm)
48" mid-mount mower deck	48 inches (121 cm), 3-blade, 184 lbs (83 kg), Simplicity 1690986
60" mid-mount mower deck	60 inches (152 cm), 3-blade, 328 lbs (148 kg), Simplicity 1691339

Transmission

Type	shaft-driven hydrostatic
Gears	infinite forward and reverse (2-range)
Oil type	ATF F
Transaxle	Peerless 2600
Oil capacity	6 qts (5.7 L)
Transmission	Sundstrand 15

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