Honda F300

Honda F300 tillerThe Honda F300 tiller is equipped with small general-purpose Honda G150 engine (144 cc, 8.8 cu-in); gear and chain transmission and V-belt and tension roller clutch. The engine uses transistorized magneto ignition, horizontal type carburetor, and recoil starter.

The Honda GX150 is a single-cylinder air-cooled 4-stroke internal combustion engine. The G150 engine a compression ratio rating is 6.5:1, cylinder bore and the piston stroke are 64.0 mm (2.52 in) and 45.0 mm (1.77 in), respectively.

The G150 produced 3.5 HP (2.6 kW) at 3600 rpm of maximum horsepower and 7.1 Nm (0.72 kg·m; 5.2 ft·lb) at 3,000 rpm of torque.

General information

Tiller, Rotavator, Cultivator Specifications
Model Honda F300
Dimensions (L x W x H): 1,200 x 590 x 1,080 mm (47.2 x 23.2 x 42.5 in)
Dry weight (without tines) 33.5 kg (73.9 lbs)
Max handle height 1,170 mm (46.1 in)
Fuel tank capacity 1.7 L (0.45 US gal, 0.37 Imp gal)
Engine model Honda G150
Displacement 144 cm3 (8.8 cu-in)
Bore x stroke 64.0 x 45.0 mm (2.52 x 1.77 in)
Max. horsepower 3.5 HP (2.6 kW) at 3600 rpm
Max. torque 7.1 Nm (0.72 kg·m; 5.2 ft·lb) at 3,000 rpm
Carburetor Horizontal type, butterfly valve
Cooling system Forced-air
Ignition system Transistorized magneto ignition
Lubricating system Splash
Starting system Recoil starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)
Transmission and clutch
Engine to transmission V-pulley and V-belt
Pulley ratio High: 1.23
Low: 1.57
High-low shift Relocating V-belt on pulleys
Clutch V-belt and tension roller
Wheel shaft Hexagonal

Maintenance data

Maximum speed 3,850 ± 150 rpm
Idle speed 1,400 ± 150 rpm
Cylinder compression 6.0 kg/cm2 (85 psi)
Adjust valve clearance
Intake valve 0.08-0.16 mm (0.0031-0.0063 in)
Exhaust valve 0.16-0.24 mm (0.0063-0.0094 in)
Oil system
Oil type Honda 4-stroke “SE”
Recommended oil 10W-40
Oil capacity 0.7 L (1.5 US pt. 1.2 Imp. pt.)
Transmission oil capacity 1.1 L (2.3 US pt, 1.9 Imp. pt.)
Main jet #70
Float height 8.2 mm (0.32 in)
Pilot screw opening 1-5/8 turns out
Ignition system
Spark plug NGK: B4H, BR4HS
Spark plug gap 0.6-0.7 mm (0.024-0.028 in)
Spark plug cap resistance 10 kΩ


  1. Does this tiller machine (Honda f300 petrol) need Same engine oil (10W 40) for engine and transmission?

    • Yes, the same oil is used in the engine and transmission, but pay your attention that this is a specification for the f300 of the late eighties, the new version with the gx80 engine uses SAE 10W-30 or 20W-40 (API SERVICE category SE or later) oil.

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