Honda G35

Honda G35 engineThe Honda G35 is a 144 cc single-cylinder air-coolled four-stroke internal combustion small gasoline (petrol) motor manufactured by Honda Motor Company.

The Honda G35 engine has a slide valve (L-head) design and camshaft driven by a single row chain driven by the crankshaft. It has a recoil starter, horizontal carburetor with butterfly valve and high voltage ignition.

Bore is 64.0 mm (2.52 in) and stroke is 45.0 mm (1.77 in). The G35 produced 3.54 PS (3.5 HP, 2.61 kW) at 4000 rpm and 6.5 Nm (0.66 kg·m, 4.77 ft·lb) at 3000 rpm and compression ratio rating is 6.4:1.

General information

Engine Specifications
Model G35
Type 4-stroke, side valve type (L-head), single cylinder
Displacement 144 cm 3 (8.79 cu-in)
Max. horsepower 3.54 PS (3.5 HP, 2.61 kW) at 4000 rpm
Max. torque 6.5 Nm (0.66 kg·m, 4.77 ft·lb) at 3000 rpm
Carburetor Horizontal, butterfly valve
Cooling system Forced-air
Ignition system High voltage ignition
Lubricating system Splash system
Starting system Recoil starter or rope starting
Stoping system Ground switch
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 2.5 L (1.27 US gal, 1.06 lmp gal)
Fuel consumption 310 g/HPh (0.68 lb/HPh)
PTO shaft rotation Counterclockwise (from PTO shaft side)

Cylinder Block and Head

Cylinder block
Compression ratio: 6.4:1
Bore x Stroke 64 x 45 mm (2.52 x 1.77 in.)
Sleeve internal diameter 64.00 mm (2.5197 in)
Piston skirt outer diameter 63.96 mm (2.518 in)
Piston pin outer diameter 15.00 mm (0.5906 in)
Piston ring gap 0.2 mm (0.008 in)
Ring side clearance 0.01 mm (0.0004 in)
Crankshaft pin puter diameter 25.980 mm (1.0228 in)
Cylinder Head
Warpage (max) 0.2 mm (0.01 in)
Valve Arrangement: Side valve type
Valves: 2
Stem outer diameter (standard): INTAKE 6.970 mm (0.2744 in)
EXHAUST 6.925 mm (0.2726 in)
Valve guide outer diameter 7.000 mm (0.2756 in)
Cam height: 17.03 mm (0.670 in)
Camshaft outer diameter: 5.020 mm (0.1976 in)

Maintenance data

Cylinder compression 5.3 kg/cm2 (75 psi)
Tappet clearance 0.05-0.10 ± 0.02 (0.002-0.004 in)
Oil system
Oil type Honda 4-stroke or an equivalent
Recommended oil SAE 10W-30
Oil capacity 0.6 L (1.27 US gal, 1.06 lmp qt)
Ignition system
Ignition timing 20° ± 3° B.T.D.C (Fixed)
Spark plug NGK: BR6HS, B6HS
Spark plug gap 0.6-0.7 mm (0.024-0.028 in)

Tightening torque specs

Tightening torque specs
Carburetor (6 mm nut) 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb
Flywheel (14 mm nut) 60-65 Nm; 6.0-6.5 kg·m; 43.4-47 ft·lb
Cylinder Head (8 x 35 mm flange bolt) 20-28 Nm; 2.0-2.8 kg·m; 14.5-20.2 ft·lb
Connecting Rod (6 x 37 mm bolt) 9-11 Nm; 0.9-1.1 kg·m; 6.5-8.0 ft·lb
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