The Honda G100 K2 is a 98 cc (6.0 cu.in.) 4-stroke, single-cylinder, air-coolled internal combustion small gasoline engine manufactured by Honda Motor Company.
The Honda G100K2 engine has a slide valve (L-head) design and camshaft driven by a single row chain driven by the crankshaft. The engine has a recoil starter, horizontal carburetor with butterfly valve and transistorized magneto ignition system.
The G100 K2 engine a compression ratio rating is 6.5:1, cylinder bore and piston stroke are 52.0 mm (20.5 in) and 46.0 mm (1.81 in), respectively. The Honda G100 produced 2.5 HP at 4200 rpm of maximum horsepower and 4.5 Nm (0.45 kg·m, 3.3 ft·lb) of maximum torque, depending on the engine application.
There are three versions of G100 engine:
- Honda G100, with 76 cc of displacement and 2.0 HP or 2.2 HP of horsepower
- Honda G100 K1, with 83 cc of displacement and 2.2 HP
- Honda G100 K2, with 98 cc of displacement and 2.5 HP of maximum output power
General information
| Engine Specifications | |
| Model | G100 K2 |
| Type | 4-stroke, side valve type (L-head), single cylinder |
| Displacement | 98 cm 3 (6.0 cu-in) |
| Max. horsepower | 2.0 HP (1.5 kW) at 4200 rpm |
| Max. torque | 3.5 Nm (0.35 kg·m, 2.5 ft·lb) |
| Carburetor | Horizontal, butterfly valve |
| Cooling system | Forced-air |
| Ignition system | Transistorized magneto |
| Lubricating system | Splash system |
| Starting system | Recoil starter |
| Stoping system | Ground of primary circuit |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
| Fuel tank capacity | 1.4 L |
| Fuel consumption | 320 g/HPh |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | 6.5:1 | |
| Bore x Stroke | 52 x 46 mm (20.5 in x 1.81 in in) | |
| Sleeve internal diameter | 52.00 mm (20.5 in) | |
| Cylinder Head | ||
| Warpage (limit) | 0.10 mm (0.004 in) | |
| Valve Arrangement: | Side valve type (L-head) | |
| Valves: | 2 | |
Maintenance data
| Engine | |
| Idle speed | 1400 ± 110 rpm |
| Cylinder compression | 6.5 kg/cm2 (637 kPa) at 800 rpm |
| Adjust timing ignition | |
| Ignition timing | 20° B.T.D.C. (Fixed) |
| Adjust valve clearance | |
| Intake valve | 0.08-0.16 mm (0.0031-0.0063 in) |
| Exhaust valve | 0.08-0.16 mm (0.0031-0.0063 in) |
| Oil system | |
| Oil type | Honda 4-stroke “SJ” |
| Recommended oil | 10W-40 |
| Oil capacity | 0.45 L |
| Ignition system | |
| Spark plug |
NGK: BPMR-4A |
| Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
Tightening torque specs
| Tightening torque specs | |
| Carburetor | 4-6 Nm; 0.4-0.6 kg·m; 2.9-4.3 ft·lb |
| Flywheel | 45-55 Nm; 4.5-5.5 kg·m; 32.5-40 ft·lb |
| Governor arm | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Cylinder head | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Crankcase cover | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
| Connecting rod | 4-6 Nm; 0.4-0.6 kg·m; 2.9-4.3 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 |
this artical was very helpful,but it left out my main question, can i use a k2 connecting rod in my k1 engine..rerering to the g100 generator engine family.
The specifications for The Honda G100 K2(98cc) model are very comprehensive, but it does not state the width and length of the PTO shaft! – Can any one help? – kind regards, Jeff.