Simplicity 4040 PowrMax

Simplicity 4040 PowrMaxThe Simplicity 4040 PowrMax is a 2WD garden tractor from the PowrMax series. This tractor was manufactured by Simplicity in Port Washington, Wisconsin, USA during 1972. The Simplicity 4040 is equipped with a 0.8 L (49.8 cu·in) two-cylinder gasoline engine and a hydrostatic transmission with infinite forward and reverse (3-range) gears.

The Simplicity 4040 PowrMax garden tractor used the Onan CCKA engine. It is a 0.8 L, 816 cm2, (49.8 cu·in) two-cylinder natural aspirated gasoline engine with 83.0 mm (3.27 in) of the cylinder bore and 76.0 mm (2.99 in) of the piston stroke. The compression ratio rating is 7.0:1. This engine produced 16.7 PS (12.3 kW; 16.5 HP) at 3,600 rpm of output power.

The Simplicity 4040 PowrMax is equipped with manual steering, disc brakes, an open operator station, and 14.4 liters (3.8 US gal.; 3.2 Imp. gal) fuel tank.

Simplicity 4040 PowrMax Specifications

General Specifications
ModelSimplicity 4040 PowrMax
Length2,100 mm (82.7 in)
Width1,430 mm (56.3 in)
Height (steering wheel)1,210 mm (47.6 in)
Wheel base1,420 mm (55.9 in)
Ground clearance380 mm (15 in)
Weight (shipping)590 kg (1,301 lbs)
Fuel tank capacity14.4 liters (3.8 US gal.; 3.2 Imp. gal)
Battery12V, 52Ah
Cabin typeOpen operator station
Engine modelOnan CCKA
Engine typeFour-stroke, air-cooled
Fuel typeGasoline
Displacement0.8 L, 816 cm2, (49.8 cu·in)
Bore and stroke83.0 mm X 76.0 mm (3.27 in X 2.99 in)
Compression ratio7.0:1
Horsepower16.7 PS (12.3 kW; 16.5 HP) at 3,600 rpm
Oil typeSAE 5W-30, 30
Oil capacity:3.3 L (3.5 US. qt, 2.9 Imp. qt.)
Spark plugChampion H-8
Transmission and chassis
Chassis4×2 2WD
Steering typeManual
Transmission modelSundstrand 15
Transmission typeHydrostatic
GearsInfinite forward and reverse (3-range)
Speed Forward: 16.7 kmh (10.4 mph) Reverse: 10.0 kmh (6.2 mph)
Transmission oil capacity5.7 L (1.5 US. gal, 1.3 Imp. gal.)
Front tires Ag: 4.00×12
Lawn/turf: 20×8-10
Rear tires Ag: 8×16
Lawn/turf: 29×12.50-15
Three-Point Hitch
Control type
Lift capacity (at ends)
PTO (Power take-off shaft)
Front PTO typeIndependent with electric clutch
Front PTO speed3,600 rpm
Rear PTO typeIndependent with electric clutch
Rear PTO speed2,000 rpm
Hydraulic system
Hydraulic type
Total flow2.25 gpm (8.5 lpm)
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