Honda HA4120 lawn tractor specs and service data

The Honda HA4120 is a lawn tractor model manufactured from 1998 to 2001 by John Deere for distributor Honda in Horicon, Wisconsin, USA. It was available in two-wheel drive (2WD) version.

The Honda HA4120 is equipped with a 614 сс (37.5 cu·in) two-cylinder gasoline engine with 77.0 mm (3.03 in) of the cylinder bore and 66.0 mm (2.6 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse gears.

The Honda HA4120 lawn tractor features:

The Honda GXV610 gasoline engine which produces 20.3 PS (14.9 kW; 20.0 HP) at 3,600 rpm of horsepower
Open operator station
Hydrostatic transmission
9.5 liters (2.5 US gal.; 2.1 Imp. gal) fuel tank
15×6.00-6 front tires and 20×10.00-8 rear tires

General specifications

General Specifications
Model	Honda HA4120
Tractor type	Lawn tractor
Production years	1998-2001
Factory	Horicon, Wisconsin, USA
Dimensions and weight
Length	1,730 mm (68.1 in)
Width	1,500 mm (59.1 in)
Height	1,030 mm (40.6 in)
Wheel base	1,160 mm (45.7 in)
Weight	253 kg (558 lbs)
Fuel capacity
Fuel tank capacity	9.5 liters (2.5 US gal.; 2.1 Imp. gal)

Engine

Engine
Engine model	Honda GXV620
Displacement	614 cm³ (37.5 cu-in)
Bore x stroke	77.0 X 66.0 mm (3.0 x 2.6 in)
Max. horsepower	20.3 PS (14.9 KW; 20.0 HP) at 3,600 rpm
Max. torque	44.1 Nm (4.5 kg·m; 32.55 ft·lb) at 2,500 rpm
Carburetor	Horizontal type, butterfly valve
Cooling system	Forced-air
Ignition system	Transistorized magneto ignition
Lubricating system	Forced lubrication
Starting system	Electric starter
Stoping system	Ignition primary circuit ground
Fuel used	Unleaded gasoline (octane number 86 or higher)
Valve clearance
Intake valve clearance	0.15±0.02 mm (0.006±0.001 in)
Exhaust valve clearance	0.20±0.02 mm (0.008±0.001 in)
Oil system
Oil type	Honda 4-stroke or an equivalent (SJ or later)
Recommended oil	SAE 10W-30
Oil capacity	With oil filter: 2.2 L (2.3 US. qt, 1.9 Imp. qt.) Without oil filter: 1.70 L (1.8 US. qt, 1.5 Imp. qt.)
Oil change interval	Every 6 month or 100 Hrs.
Ignition system
Ignition timing	20° B.T.D.C.
Spark plug	NGK: ZGR5A DENSO: J16CR-U
Spark plug gap	0.7-0.8 mm (0.028-0.031 in)
Primary ignition coil resistance	0.8-1.0 Ω
Secondary ignition coil resistance	7.0-8.6 kΩ
Ignition coil air gap	0.4 ± 0.2 (0.016 ± 0.008)
Starter motor
Brush length	10.0 mm (0.43 in)

Transmission and chassis

Chassis, steering and brakes
Chassis	4×2 2WD
Steering type	Manual
Brakes	–
Transmission
Transmission manufacturer or model	Tuff Torq K61
Transmission type	Hydrostatic
Gears	Infinite forward and reverse
Speed	Forward: 8.0 kmh (5 mph) Reverse: 3.9 kmh (2.4 mph)
Transmission oil capacity	3.4 L (0.9 US. gal, 0.7 Imp. gal.)

Tires

Tires
Front tires	Lawn/turf: 15×6.00-6
Rear tires	Lawn/turf: 20×10.00-8

Electrical system

Electrical system
Ground	Negative
Charging system	–
Charging amps	–
Battery	12V

Attachments

Mid-mount Honda 48 in (1,210 mm) mower deck with 3-blade
Cutting width	1,210 mm (48 in)
Cut height	20-100 mm (1-4 in)

Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

Honda HA4120