The Honda G65 is a 240 cc single-cylinder air-coolled 4-stroke internal combustion small gasoline engine manufactured by Honda Motor Company since 1966 for general-purpose applications, such as: commercial lawn and garden equipment, tillers and cultivators, generators, construction and industrial equipment, agricultural equipment, small vehicles.
The Honda G65 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.
The G65 produced 6.8 HP (5.0 kW) at 4000 rpm and 12.2 Nm (1.24 kg·m) at 3000 rpm. The dry weight of the Honda G65 engine was 27.6 kg (61.7 lbs). A 72 mm (2.8 in) cylinder bore and 59 mm (2.3 in) piston stroke give the engine a total of 240 cc (14.6 cu.in.) of displacement. The compression ratio is 6.1:1.
|Type||4-stroke, side valve type (L-head), single cylinder|
|Displacement||240 cm 3 (14.6 cu-in)|
|Max. horsepower||6.8 HP (5.0 kW) at 4000 rpm|
|Max. torque||12.0 Nm (1.24 kg·m) at 3000 rpm|
|Carburetor||Horizontal, butterfly valve|
|Ignition system||High voltage ignition|
|Lubricating system||Splash system|
|Starting system||Recoil starter|
|Stoping system||Ground switch|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Fuel tank capacity||6.9 L (1.6 US gal., 1.5 Imp. gal.)|
|Fuel consumption||300 g/HPh (0.67 lb/HPh)|
|PTO shaft rotation||Counterclockwise (from PTO shaft side)|
Cylinder Block and Head
|Bore x Stroke||72 X 59 mm (2.8 x 2.3 in)|
|Sleeve internal diameter||72.00 mm (2.835 in)|
|Piston skirt outer diameter||71.97 mm (2.833 in)|
|Ring width||Top||2.48 mm (0.098 in)|
|Second/Oil||2.49 mm (0.098 in)|
|Ring Side Clearance||Top||0.02 mm (0.0008 in)|
|Second/Oil||0.01 mm (0.0004 in)|
|Piston pin outer diameter||19.0 mm (0.748 in)|
|Warpage (max)||0.2 mm (0.01 in)|
|Valve Arrangement:||Side valve type (L-head)|
|Stem outer diameter (standard):||INTAKE||6.97 mm (0.274 in)|
|EXHAUST||6.93 mm (0.273 in)|
|Valve guide internal diameter||7.00 mm (0.276 in)|
|Cam height:||INTAKE||35.18 mm (1.385 in)|
|EXHAUST||35.18 mm (1.385 in)|
|Cylinder compression||4.0 kg/cm2 at 450-600 rpm|
|Intake valve||0.06-0.11 mm (0.0023-0.0043)|
|Exhaust valve||0.06-0.11 mm (0.0023-0.0043)|
|Oil type||Honda 4-stroke or an equivalent (SG, SF)|
|Recommended oil||SAE 10W-30, 10W-40|
|Oil capacity||0.82 L (1.7 US pt., 1.4 Imp. pt.)|
|Ignition timing||25 ° 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|
|Fuel tank (8 mm nut, bolt)||20-28 Nm; 2.0-2.8 kg·m; 14.5-20.2 ft·lb|
|Side cover (8 mm bolt)||20-25 Nm; 2.0-2.5 kg·m; 14.5-18.1 ft·lb|
|Cylinder Head (8 mm bolt)||20-25 Nm; 2.0-2.5 kg·m; 14.5-18.1 ft·lb|
|Cylinder (6 mm bolt)||8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb|
|Cylinder (8 mm bolt)||20-28 Nm; 2.0-2.8 kg·m; 14.5-20.2 ft·lb|
|Camshaft center (6 mm bolt)||10-15 Nm; 1.0-1.5 kg·m; 7.2-10.8 ft·lb|
|Starter pulley (6 mm bolt)||8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb|
|Flywheel (17 mm nut)||70-80 Nm; 7.0-8.0 kg·m; 50.6-57.9 ft·lb|
|Muffler (6 mm nut)||8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb|
|Carburetor (6 mm nut)||8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb|
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
Bit more info please; bore dm., stnd. piston size etc with engine description.
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