Honda GX100 is a 98 cc (5.98 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.
A 56.0 mm (2.2 in) cylinder bore and 40.0 mm (1.57 in) piston stroke give the GX100 engine a total of 98 cc of displacement. The compression ratio rating is 8.5:1.
The Honda GX100 engine produced 3.0 PS (2.2 kW; 3.0 HP) at 3,600 rpm of maximum output power and 5.7 N·m (0.6 kg·m, 4.2 ft·lb) at 3,600 rpm of peak torque.
The Honda GX100 features:
Overhaed camshaft OHC design Transistorized magneto ignition system Horizontal type carburetor with butterfly valve Centrifugal governor Splash lubrication system Forced air cooling system Recoil starter General information Engine Specifications Engine model GX100 Engine type 4-stroke, OHC, single-cylinder Displacement 98 cm3 , (5.98 cu·in) Max. horsepower 3.0 PS (2.2 kW; 3.0 HP) at 3,600 rpm Max. torque 5.7 N·m (0.6 kg·m, 4.2 ft·lb) at 3,600 rpm Cooling system Forced air Air cleaner Dual-element type Lubricating system Splash Ignition system Transistorized magneto ignition Fuel system Horizontal type carburetor with butterfly valve Fuel consumption 240 g/PSh Fuel tank capacity 1.2 L (0.32 US. gal. 0.26 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: 8.5:1 Cylinder bore: 56.0 mm (2.2 in) Piston stroke: 40.0 mm (1.57 in) Cylinder internal diameter (standard): 56.000 mm (2.2047 in) Piston skirt outer diameter (standard): 55.965-55.985 mm (2.2033-2.2041 in) Number of piston rings (compression / oil): 2/1 Connecting rod small end diameter (standard): 13.005-13.020 mm (0.512-0.5126 in) Side clearance (Top): 0.015-0.050 mm (0.0006-0.002 in) Side clearance (Second): 0.015-0.050 mm (0.0006-0.002 in) Side clearance (Oil): 0.015-0.050 mm (0.0006-0.002 in) Ring end gap (Top): 0.150-0.300 mm (0.0059-0.0118 in) Ring end gap (Second): 0.300-0.450 mm (0.0118-0.0177 in) Crankpin journal diameter: 23.970-23.980 mm (0.9437-0.9441 in) Crankshaft center distance: 20 mm (0.785 in) Cylinder head Valve arrangement: OHC Valves: 2 Valve steam diameter (INTAKE): 3.970-3.985 mm (0.1563-0.1569 in) Valve steam diameter (EXHAUST): 3.935-3.950 mm (0.1549-0.1555 in) Valve spring free length (INTAKE): 25.800 mm (1.0157 in) Valve spring free length (EXHAUST): 25.800 mm (1.0157 in) Camshaft lobe height (INTAKE): 36.483 mm (1.4363 in) Camshaft lobe height (EXHAUST): 36.483 mm (1.4363 in)
Tightening torque Tightening torque specs Connecting rod bolt 5 Nm; 0.5 kg·m; 3.6 ft·lb Oil dran plug bolt 18 Nm; 1.8 kg·m; 13 ft·lb Valve adjusting lock nut 7.5 Nm; 0.75 kg·m; 5.4 ft·lb Flywheel nut 42 Nm; 4.3 kg·m; 31 ft·lb Governor arm nut 10 Nm; 1.0 kg·m; 7 ft·lb Stopper plate screw 1 Nm; 0.1 kg·m; 0.7 ft·lb Spark plug 11.8 Nm; 1.2 kg·m; 8.7 ft·lb
Service Data Engine Maximum speed: 4,000 ± 200 rpm Idle speed: 1,550 ± 150 rpm Cylinder compression: 5.0 kg/cm2 (71 psi) at 700 rpm Valve clearance Intake valve 0.15 ± 0.04 mm (0.006 ± 0.002 in) Exhaust valve 0.20 ± 0.04 mm (0.008 ± 0.002 in) Oil system Lubrication system: Splash Oil type: Honda 4-stroke or an equivalent (SE or SF) Recommended oil: SAE 10W-30 Oil capacity: 0.4 L (0.42 US. qt, 0.35 Imp. qt.) Fuel system Type: Horizontal type carburetor with butterfly valve Main jet: #60 Float height: 12 mm mm (0.4724 in) Pilot screw opening: 2-3/8 turns out Ignition system Type: Transistorized magneto ignition Spark plug: NGK: CR5HSB DENSO: U16FSR-UBSpark plug gap: 0.7-0.8 mm (0.0276-0.0315 in)
Applications Manufacturer or Brand Models Generators Honda EB2000i
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The Honda GX100 is a 98 cc (5.98 cu·in) natural aspirated single-cylinder four-stroke air-cooled internal combustion small gasoline engine with a horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.
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