The Honda GV100 is a 97 cc (5.9 cu.in.) single-cylinder air-coolled four-stroke internal combustion small gasoline engine with vertical shaft manufactured by Honda Motor Company.
The Honda GV100 engine has a side-valve design with camshaft driven by a timing chain. It has a recoil starter, horizontal butterfly type carburetor, and flywheel magneto ignition system.
The cylinder bore is 52.0 mm (2.04 in) and the piston stroke is 46.0 mm (1.81 in). Compression ratio rating is 6.5:1. The Honda GV100 motor produced 2.6 HP (1.9 kW) at 4200 rpm of horsepower and 4.3 Nm (0.43 kg·m) at 3000 rpm of torque.
General information
Engine Specifications | |
Model | GV100 K1 |
Type | 4-stroke, side valve, single cylinder |
Displacement | 97 cm 3 (5.9 cu-in) |
Max. horsepower | 2.6 HP (1.9 kW) at 4200 rpm |
Max. torque | 4.3 Nm (0.43 kg·m) at 3000 |
Carburetor | Horizontal type butterfly valve |
Cooling system | Forced-air |
Ignition system | Transistorized magneto ignition |
Lubricating system | Splash type |
Starting system | Recoil starter |
Stoping system | Ignition primary circuit ground |
Fuel used | Unleaded gasoline (octane number 86 or higher) |
Fuel tank capacity | 0.9 L (0.24 US gal, 0.20 lmp gal) |
PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions and Weight
Honda GV100 K1 | ||
Length, mm (in) | 390 (15.35) | |
Width, mm (in) | 357 (14.05) | |
Height, mm (in) | 227 (8.97) | |
Dry weight, kg (lb) | 8.9 (19.6) |
Cylinder Block and Head
The piston has two compression rings and one oil ring. Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency.
Cylinder block | ||
Compression ratio: | 6.5:1 | |
Bore x Stroke | 52 X 46 mm (2.04 x 1.81 in) | |
Sleeve internal diameter | 52.00 mm (2.0472 in) | |
Piston skirt outer diameter | 51.995 mm (2.0470 in) | |
Number of piston rings (compression / oil): | 2 / 1 | |
Ring side clearance | Top/second/oil | 0.100-0.135 mm (0.004-0.006 in) |
Ring end gap | Top/second | 0.15-0.30 mm (0.006-0.012 in) |
Oil | 0.20-0.70 mm (0.008-0.030 in) | |
Connecting rod small end ID | 10.006 mm (0.395 in) | |
Connecting rod big end ID | 18.000 mm (0.709 in) | |
Crankshaft crank pin outer diameter | 17.984 mm (0.7080 in) | |
Cylinder Head | ||
Warpage (limit) | 0.10 mm (0.004 in) | |
Valve Arrangement: | Side valve (L-head) | |
Valves: | 2 | |
Stem outer diameter (standard): | INTAKE | 5.490 mm (0.0.2161 in) |
EXHAUST | 5.445 mm (0.2144 in) | |
Cam height: | INTAKE | 21.82 mm (0.859 in) |
EXHAUST | 21.82 mm (0.859 in) | |
Valve spring free length: | 27.1 mm (1.07 in) |
MAINTENANCE DATA
Engine | |
Maximum speed | 3000 rpm |
Idle speed | 2000 ± 150 rpm |
Cylinder compression | 2.0-4.0 kg/cm2 at 600 rpm 8.2 kg/cm2 at 1200 rpm |
Valve clearance | |
Intake valve | 0.08-0.16 mm (0.031-0.0063 in) |
Exhaust valve | 0.08-0.16 mm (0.031-0.0063 in) |
Carburetor | |
Main jet | #58 |
Float height | 12.0±1.5 mm (0.42-0.52 in) |
Pilot screw opening | 2 3/8 |
Oil system | |
Oil type | Honda 4-stroke or an equivalent (SG.SF/CC.CD) |
Recommended oil | SAE 10W-30 |
Oil capacity | 0.4 L (0.42 US qt, 0.35 lmp qt) |
Ignition system | |
Ignition timing | 20 ° B.T.D.C (Fixed) |
Spark plug | NGK: BMR-4A NIPPONDENSO: W14MR-U |
Spark plug gap | 0.6-0.7 mm (0.024-0.028 in) |
Primary ignition coil resistance | 0.7-0.9 kΩ |
Secondary ignition coil resistance | 6.3-7.7 kΩ |
Clearance to flywheel (air gap) | 0.2-0.6 mm (0.008-0.024 in) |
Tightening torque specs
Tightening torque specs | |
Cylinder head (6 mm bolts, nuts) | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
Oil pan | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
Connecting rod cap (5 mm bolt) | 4-6 Nm; 0.4-0.6 kg·m; 2.9-4.3 ft·lb |
Carburetor (5 mm nuts) | 4-6 Nm; 0.4-0.6 kg·m; 2.9-4.3 ft·lb |
Governor arm (6 mm nut) | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
Flywheel (12 mm nut) | 45-55 Nm; 4.5-5.5 kg·m; 32-40 ft·lb |
Side plate | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
Tappet cover | 8-12 Nm; 0.8-1.2 kg·m; 5.8-8.7 ft·lb |
Air cleaner case | 7-10 Nm; 0.7-1.0 kg·m; 5.1-7.2 ft·lb |
Muffler | 13-17 Nm; 1.3-1.7 kg·m; 9.4-12 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 |
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.
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