The Honda GV150 is a 144 cc, (8.8 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a vertical shaft, manufactured by Honda Motor Company for general-purpose applications.
A 64.0 mm (2.52 in) cylinder bore and 45.0 mm (1.77 in) piston stroke give the GV150 engine a total of 144 cc of displacement. The compression ratio rating is 6.3:1.
This engine produced 3.5 PS (2.6 kW; 3.5 HP) at 3,600 rpm of horsepower and 7.0 N·m (0.7 kg·m, 5.2 ft·lb) at 3,500 rpm of torque.
The Honda GV150 features:
- L-head design
- Transistorized magneto ignition or CDI ignition system
- Horizontal type carburetor with butterfly valve
- Centrifugal governor
- Forced air cooling system
- Recoil starter
General information
| Engine Specifications | |
| Engine model | GV150 |
| Engine type | 4-stroke, L-head, single-cylinder |
| Displacement | 144 cm3, (8.8 cu·in) |
| Max. horsepower | 3.5 PS (2.6 kW; 3.5 HP) at 3,600 rpm |
| Max. torque | 7.0 N·m (0.7 kg·m, 5.2 ft·lb) at 3500 rpm |
| Cooling system | Forced air |
| Air cleaner | – |
| Lubricating system | Trochoid oil pump |
| Ignition system | Transistorized magneto ignition or CDI |
| Fuel system | Horizontal type carburetor with butterfly valve |
| Fuel consumption | 310 g/HPh |
| Fuel tank capacity | 1.0 L (0.26 US. gal. 0.22 Imp. gal.) |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Starting system | Recoil starter |
| Stoping system | Ignition primary circuit ground |
| Governor | Centrifugal governor |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
| Dimensions (L x W X H) | – |
| Dry weight | – |
Cylinder Block and Head
| Cylinder block | |
| Compression ratio: | 6.3:1 |
| Cylinder bore: | 64.0 mm (2.52 in) |
| Piston stroke: | 45.0 mm (1.77 in) |
| Cylinder internal diameter (standard): | 64.000 mm (2.5197 in) |
| Piston skirt outer diameter (standard): | 63.990 mm (2.5193 in) |
| Number of piston rings (compression / oil): | 2/1 |
| Connecting rod small end diameter (standard): | 15.005-15.020 mm (0.5907-0.5913 in) |
| Side clearance (Top): | 0.010-0.050 mm (0.0004-0.002 in) |
| Side clearance (Second): | 0.010-0.050 mm (0.0004-0.002 in) |
| Side clearance (Oil): | 0.010-0.050 mm (0.0004-0.002 in) |
| Ring end gap (Top): | 0.200-0.400 mm (0.0079-0.0157 in) |
| Ring end gap (Second): | 0.200-0.400 mm (0.0079-0.0157 in) |
| Ring end gap (Oil): | 0.200-0.400 mm (0.0079-0.0157 in) |
| Crankpin journal diameter: | 26.980 mm (1.0622 in) |
| Crankshaft center distance: | 22.5 mm (0.885 in) |
| Cylinder head | |
| Valve arrangement: | L-head |
| Valves: | 2 |
| Valve steam diameter (INTAKE): | 6.955-6.970 mm (0.2738-0.2744 in) |
| Valve steam diameter (EXHAUST): | 6.910-6.925 mm (0.272-0.2726 in) |
| Valve spring free length (INTAKE): | 36.700 mm (1.4449 in) |
| Valve spring free length (EXHAUST): | 36.700 mm (1.4449 in) |
| Camshaft lobe height (INTAKE): | 29.180 mm (1.1488 in) |
| Camshaft lobe height (EXHAUST): | 29.180 mm (1.1488 in) |
Tightening torque specs
| Tightening torque specs | |
| Drain screw (20 mm bolt) | 40-50 Nm; 4.0-5.0 kg·m; 29-36 ft·lb |
| Drain screw (12 mm bolt) | 15-25 Nm; 1.5-2.5 kg·m; 11-18 ft·lb |
| Flywheel (14 mm nut) | 70-80 Nm; 7.8-8.0 kg·m; 51-58 ft·lb |
| Ignition coil (6 mm) | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Cylinder head (8 mm bolt) | 24-26 Nm; 2.4-2.6 kg·m; 17-19 ft·lb |
| Fan cover | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Connecting rod lower cap (7 mm bolt) | 11-13 Nm; 1.1-1.3 kg·m; 8.0-9.4 ft·lb |
| Oil pan | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Side plate | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Tappet cover | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Air cleaner case | 7-10 Nm; 0.7-1.0 kg·m; 5.1-7.2 ft·lb |
| Muffler | 13-17 Nm; 1.3-1.7 kg·m; 9.4-12 ft·lb |
| Others | |
| 5 mm bolts, nuts | 4-7 Nm; 0.4-0.7 kg·m; 2.9-5.1 ft·lb |
| 6 mm bolts, nuts | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| 8 mm bolts, nuts | 20-28 Nm; 2.0-2.8 kg·m; 14.5-20.3 ft·lb |
| 10 mm bolts, nuts | 35-40 Nm; 3.5-4.0 kg·m; 25-29 ft·lb |
Service Data
| Idle speed: | 1700 ± 150 rpm |
| Cylinder compression: | 5.0 kg/cm2 at 600 rpm |
| Valve clearance | |
| Intake valve clearance: | 0.08-0.16 mm (0.0031-0.0063 in) |
| Exhaust valve clearance: | 0.16-0.24 mm (0.0063-0.0094 in) |
| Oil system | |
| Lubrication system: | Trochoid oil pump |
| Oil type: | Honda 4-stroke or an equivalent (SG.SF/CC.CD) |
| Recommended oil: | SAE 10W-30 |
| Oil capacity: | 0.6 L (0.63 US. qt, 0.53 Imp. qt.) |
| Fuel system | |
| Type: | Horizontal type carburetor with butterfly valve |
| Main jet: | #65 |
| Float height: | 6.7-9.7 mm mm (0.2638 in) |
| Pilot screw opening: | 2-1/8 turns out |
| Ignition system | |
| Type: | Transistorized magneto ignition or CDI |
| Ignition timing: | 20° B.T.D.C (Fixed) |
| Spark plug: | Flywheel magneto type: NGK: BM6A, BMR6A CDI: NGK: BPM6A, BPMR6AF |
| Spark plug gap: | Flywheel magneto type: 0.6-0.7 mm (0.024-0.028 in) CDI: 0.9-1.0 mm (0.035-0.039 in) |
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