The Honda F450 tiller is equipped with small general-purpose Honda G150 engine (144 cc, 8.8 cu-in); gear type transmission and belt main clutch. The engine uses a CDI (contact breaker point) or flywheel transistorized magneto ignition, a horizontal type carburetor and recoil starter.
The Honda G150 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 engine produces 3.5 PS (2.6 kW; 3.5 HP) at 3,600 rpm of maximum horsepower and 7.1 N·m (0.7 kg·m, 5.2 ft·lb) at 3,000 rpm of maximum torque for models with CDI ignition system or 3.8 PS (2.8 kW; 3.8 HP) at 3,600 rpm of peak power and 7.4 N·m (0.8 kg·m, 5.5 ft·lb) at 3,000 rpm of maximum torque for models with transistorized magneto ignition system.
General information
| Tiller, Rotavator, Cultivator Specifications | |
| Model | Honda F450 |
| Dimensions (L x W x H): | F450F,D,SP:1,425 x 620 x 1,195 mm (56.1 x 24.4 x 47.0 in) F450G: 1,520 x 620 x 1,195 mm (59.8 x 24.4 x 47.0 in) |
| Dry weight | F450F: 43.0 kg (94.8 lbs) F450D: 49.0 kg (108.0 lbs) F450SP: 43.0 kg (94.8 lbs) F450G: 51.0 kg (112.5 lbs) |
| Fuel tank capacity | 1.7 L (0.45 US gal, 0.37 Imp gal) |
| Engine | |
| 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 PS (2.6 kW; 3.5 HP) at 3,600 rpm (CDI) 3.8 PS (2.8 kW; 3.8 HP) at 3,600 rpm (Transistorized magneto) |
| Max. torque | 7.1 N·m (0.7 kg·m, 5.2 ft·lb) at 3,000 rpm (CDI) 7.4 N·m (0.8 kg·m, 5.5 ft·lb) at 3,000 rpm (Transistorized magneto) |
| Carburetor | Horizontal type, butterfly valve |
| Cooling system | Forced-air |
| Ignition system | CDI or transistorized magneto ignition (F450G) |
| 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 | |
| Main clutch | Belt and tension |
| Side clutch | Mechanical (ball type) |
| Transmission gear ratio | 1st gear: 29 1nd gear: 20 Rear gear: 41.6 |
| Pulley ratio | Low: 1.57 High: 0.82 |
| Transmission oil capacity | 1.3 liters (1.37 US.qts, 1.14 Imp. qts) |
| PTO (except for F450SP type) | |
| Shaft RPM (at engine 1,800 rpm) | Low: 1,152 rpm High: 2,210 rpm |
| Shaft diameter | 18.0 x 15.0 mm (0.71 x 0.60 in) |
| Direction of rotation | Clockwise |
Maintenance data
| Engine | |
| 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 | 1.3 liters (1.37 US.qts, 1.14 Imp. qts) |
| Ignition system | |
| Spark plug | CDI: NGK BPR4HS-10, ND W14FPR-UL10 Transistorized magneto: NGK BR4HS, ND W14FR-U |
| Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
| Spark plug cap resistance | 10 kΩ |
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