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Honda GV100 Engine

General Technical Data

Honda GV100 Engine Specifications

Engine Model ............... Honda GV100
Engine Type ............... 4-cycle 1-cylinder air-cooled small gasoline engine
Number of Cylinders ............... Single
Displacement, cu.in (cc) ............... 5.9 (97)
Engine Bore, in (mm) ............... 2.04 (52.0)
Engine Stroke, in (mm) ............... 1.81 (46.0)
Rated Engine Power, hp (kW) ............... 2.6 (1.9)
Rated Engine Speed, rpm ............... 4200
Maximum Torque, Nm (ft-lbs) ............... 4.3 (3.2)
Torque Speed, rpm ............... 3000
Compression ............... 5.6:1
PTO Shaft Rotation ............... Counterclockwise (from PTO side)
Lubrication System ............... Forced splash type
Air Cleaner ............... Single element
Cooling System ............... Forced air
Ignition System ............... Transistorized magneto
Stopping System ............... Primary circuit ground
Starting System ............... Recoil starter

Fuel System

Fuel System Type ............... Carburetor
Carburetor Type ............... Horizonal, butterfly valve
Governor Type ............... Centrifugal
Fuel Tank Capacity, qts (L) ............... 0.95 (0.90)
Fuel Type ............... Gasoline (86 or higher)

Dimensions and Weight

Overall Length, in (mm) ............... 15.4 (390)
Overall Width, in (mm) ............... 14.1 (357)
Overall Height, in (mm) ............... 8.9 (227)
Net Weight, lbs (kg) ............... 19.6 (8.9)
Operating Weight, lbs (kg) ............... 21.8 (9.9)

Honda GV100 Maintenance Data

Cylinder Block and Valves

Cylinder Bore Inside Diameter (Maximum), in (mm) ............... 2.0492 (52.050)
Cylinder Compression, psi (kPa) ............... 57-114 (400-800)
Cylinder Head (Max. Out of Flatness), in (mm) ............... 0.004 (0.10)
Intake Valve Clearance, in (mm) ............... 0.003-0.006 (0.08-0.16)
Exhaust Valve Clearance, in (mm) ............... 0.003-0.006 (0.08-0.16)

Engine Oil and Filter

Engine Oil Type (Summer) ............... SAE 10W-30
Engine Oil Type (Winter) ............... SAE 5W-30
API Service Classifications ............... SG or SF
Oil Capacity, qts (L) ............... 0.42 (0.40)
Air Filter Element Part Number ............... 17211-ZL1-000

Carburetor Adjustment

Main Jet ............... #58
Idle Fuel ............... 2-3/8 turns out
Float Height, in (mm) ............... 0.42-0.52 (10.5-13.5)
Low Idle Speed, rpm ............... 2000±150
High Idle Speed, rpm ............... 3000±100

Ignition System

Spark Plug Type ............... NGK BMR4A or Denso W14MR-U
Spark Plug Gap, in (mm) ............... 0.024-0.028 (0.60-0.70)
Module Air Gap, in (mm) ............... 0.008-0.024 (0.20-0.60)
Ignition Timing, deg ............... 20 BTDC
Spark Plug Torque, Nm (ft-lbs) ............... 18 (13)

Service Intervals

Clean Air Cleaner Element ............... Every 50 hours
Change Engine Oil ............... Every 100 hours
Check and Adjust Spark Plug ............... Every 100 hours
Check Carburetor Adjustment ............... Every 100 hours
Clean Fuel Strainer ............... Every 300 hours
Check and Adjust Valve Clearance ............... Every 300 hours
Replace Spark Plug ............... Every 300 hours

Honda GV100 Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Std), in (mm) ............... 2.0472-2.2478 (52.000-52.015)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) ............... 2.0492 (52.050)
Connecting Rod Small End Inside Diameter (Std), in (mm) ............... 0.395 (10.006)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) ............... 0.396 (10.050)
Connecting Rod Big End Inside Diameter (Std), in (mm) ............... 0.709 (18.000)
Connecting Rod Big End Inside Diameter (Wear Limit), in (mm) ............... 0.710 (18.040)
Connecting Rod Big End Oil Clearance, in (mm) ............... 0.001 (0.027)
Crank Pin Outside Diameter (Std), in (mm) ............... 0.7080 (17.984)
Crank Pin Outside Diameter (Wear Limit), in (mm) ............... 0.7060 (17.940)

Cylinder Head and Valves

Number of Valves ............... 2
Cylinder Head (Max. Out of Flatness), in (mm) ............... 0.004 (0.10)
Intake Valve Clearance, in (mm) ............... 0.0031-0.0063 (0.080-0.160)
Exhaust Valve Clearance, in (mm) ............... 0.0031-0.0063 (0.080-0.160)
Intake Valve Stem Outside Diameter (Std), in (mm) ............... 0.2161 (5.490)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) ............... 0.214 (5.440)
Exhaust Valve Stem Outside Diameter (Std), in (mm) ............... 0.2144 (5.445)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) ............... 0.213 (5.400)
Intake Valve Guide Inside Diameter, in (mm) ............... 0.217 (5.500)
Exhaust Valve Guide Inside Diameter, in (mm) ............... 0.217 (5.500)
Intake Valve Guide To Stem Clearance, in (mm) ............... 0.0004-0.0014 (0.010-0.032)
Exhaust Valve Guide To Stem Clearance, in (mm) ............... 0.0022-0.0030 (0.055-0.077)
Valve Seat Width (Intake/Exhaust), in (mm) ............... 0.028 (0.70)
Valve Spring Free Length, in (mm) ............... 1.07 (27.10)
Cam Height (Intake), in (mm) ............... 0.859 (21.82)
Cam Height (Exhaust), in (mm) ............... 0.859 (21.82)

Piston and Piston Rings

Piston Skirt Outside Diameter (Std), in (mm) ............... 2.0470 (51.995)
Piston Skirt Outside Diameter (Wear Limit), in (mm) ............... 2.0440 (51.930)
Piston to Cylinder Bore Clearance (Std), in (mm) ............... 0.0002-0.0014 (0.005-0.035)
Piston to Cylinder Bore Clearance (Wear Limit), in (mm) ............... 0.005 (0.12)
Piston Pin Outside Diameter (Std), in (mm) ............... 0.394 (10.000)
Piston Pin Outside Diameter (Wear Limit), in (mm) ............... 0.392 (9.950)
Top Compression Ring Groove Side Clearance, in (mm) ............... 0.004-0.006 (0.100-0.135)
Second Compression Ring Groove Side Clearance, in (mm) ............... 0.004-0.006 (0.100-0.135)
Top Compression Ring End Gap, in (mm) ............... 0.006-0.012 (0.15-0.30)
Second Compression Ring End Gap, in (mm) ............... 0.006-0.012 (0.15-0.30)
Oil Ring End Gap, in (mm) ............... 0.008-0.030 (0.20-0.70)
Ring End Gap (Wear Limit), in (mm) ............... 0.04 (1.00)

Honda GV100 Tightening Torque Specs

Cylinder Head Bolt (M6x1.0) ............... 8-12 Nm (6-9 ft-lb)
Connecting Rod Bolt (M5x0.7) ............... 4-6 Nm (3-4.5 ft-lb)
Flywheel Nut (M12x1.25) ............... 44-54 Nm (33-40 ft-lb)
Crankcase Cover Bolt (M6x1.0) ............... 8-12 Nm (6-9 ft-lb)
Carburetor (M5x0.7) ............... 4-6 Nm (3-4.5 ft-lb)
Governor Arm (M6x1.0) ............... 8-12 Nm (6-9 ft-lb)
Air Cleaner Cover (M6x1.0) ............... 1-1.5 Nm (0.75-1.1 ft-lb)
Spark Plug (M10x1.0) ............... 18 Nm (14 ft-lb)

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