Honda GV150

Honda GV150The 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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