The Honda G28 is a 67 cc, (4.1 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company from 1969 for general-purpose applications.
The Honda G28 engine has an overhead camshaft and an efficient combustion chamber designs together with a high-performance carburetor. The G28 is equipped with a 2.6 L (0.69 US. gal. 0.57 Imp. gal.) fuel tank.
This engine produced 2.0 PS (1.49 kW; 2.0 HP) at 5,000 rpm of continuous rated output power and 3.0 PS (2.23 kW; 3.0 HP) at 6,000 rpm fo maximum power.
|Engine type||4-stroke, single-cylinder|
|Displacement||67 cm3, (4.1 cu·in)|
|Max. horsepower||3.0 PS (2.23 kW; 3.0 HP) at 6,000 rpm|
|Cooling system||Forced air|
|Lubricating system||Splash type|
|Ignition system||High-voltage ignition|
|Fuel system||Horizontal type carburetor with butterfly valve|
|Fuel tank capacity||2.6 L (0.7 US. gal. 0.57 Imp. gal.)|
|Fuel used||Unleaded gasoline (octane number 86 or higher)|
|Starting system||Recoil starter|
|Stoping system||Ignition primary circuit ground|
|PTO shaft rotation||Counterclockwise (from PTO shaft side)|
|Dimensions (L x W X H)||–|
Cylinder Block and Head
Cylinder bore and piston stroke are 49.0 mm (1.93 in) and 35.5 mm (1.4 in), respectively. The compression ratio rating is 8.3:1. Friction components such as the cylinder sleeve and piston are made of high-strength materials. The crankshaft is mounted on ball bearings for reduced friction.
|Cylinder bore:||49.0 mm (1.93 in)|
|Piston stroke:||35.5 mm (1.4 in)|
The Honda 4-stroke or an equivalent oil with a viscosity of SAE 10W-30 or 10W-40 is recommended for the G28 engine, refilling oil capacity is 0.7 L (0.74 US. qt, 0.62 Imp. qt.). Recommended spark plug is C-6HB with a 0.6-0.7 mm (0.0236-0.0276 in) spark plug gap.
|Lubrication system:||Splash type|
|Oil type:||SAE 10W-30 or 10W-40|
|Recommended oil:||Honda 4-stroke or an equivalent|
|Oil capacity:||0.7 L (0.74 US. qt, 0.62 Imp. qt.)|
|Type:||Horizontal type carburetor with butterfly valve|
|Spark plug gap:||0.6-0.7 mm (0.0236-0.0276 in)|
|Manufacturer or Brand||Models|