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Honda GCV190 Specifications

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• Honda GCV190 Engine Specifications
• Honda GCV190 Engine Troubleshooting

Engine Model .............. Honda GCV190
Engine Type .............. 4-cycle overhead camshaft 1-cylinder air-cooled small gasoline engine
Number of Cylinders .............. Single
Displacement, cu.in (cc) .............. 11.4 (187)
Cylinder Bore, in (mm) .............. 2.71 (69.0)
Piston Stroke, in (mm) .............. 1.98 (50.0)
Rated Engine Power, hp (kW) .............. 6.5 (4.8)
Rated Engine Speed, rpm .............. 3600
Maximum Torque, Nm (ft-lbs) .............. 13.2 (9.74)
Torque Speed, rpm .............. 2500
Compression Ratio .............. 8.5:1
PTO Shaft Rotation .............. Counterclockwise (from PTO shaft side)
Valve Arrangement .............. OHC
Lubrication System .............. Splash type
Air Cleaner .............. Dry type
Cooling System .............. Forced air
Ignition System .............. Transistorized magneto
Starter Type .............. Recoil

Fuel System Type .............. Carburetor
Carburetor Type .............. Horizontal with butterfly valve
Governor Type .............. Centrifugal mechanical
Fuel Tank Capacity, qts (L) .............. 1.2 (1.1)
Fuel Type .............. Gasoline (86 or higher)

Overall Length, in (mm) .............. 14.4 (367)
Overall Width, in (mm) .............. 13.0 (331)
Overall Height, in (mm) .............. 14.5 (368)
Dry Weight, lbs (kg) .............. 27.6 (12.5)

Cylinder Bore Inside Diameter (Std), in (mm) .............. 2.72 (69.0)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) .............. 2.727 (69.165)
Connecting Rod Small End Inside Diameter (Std), in (mm) .............. 0.5120 (13.005)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) .............. 0.515 (13.07)
Connecting Rod Big End Inside Diameter (Std), in (mm) .............. 1.1819 (30.020)
Connecting Rod Big End Inside Diameter (Wear Limit), in (mm) .............. 1.1883 (30.066)
Connecting Rod Big End Oil Clearance, in (mm) .............. 0.0016-0.0025 (0.040-0.063)
Crankshaft Journal Outside Diameter (PTO), in (mm) .............. 1.1021 (27.993)
Crankshaft Journal Outside Diameter (Flywheel), in (mm) .............. 0.9997 (25.393)
Crank Pin Outside Diameter, in (mm) .............. 1.1803 (29.980)
Cam Height, in (mm) .............. 1.4722 (37.394)
Rocker Arm Inside Diameter (Std), in (mm) .............. 0.2362 (6.00)
Rocker Arm Inside Diameter (Wear Limit), in (mm) .............. 0.2379 (6.043)
Rocker Arm Shaft Outside Diameter (Std), in (mm) .............. 0.2358 (5.99)
Rocker Arm Shaft Outside Diameter (Wear Limit), in (mm) .............. 0.2344 (5.953)
Rocker Arm Shaft Bearing Inside Diameter (Std), in (mm) .............. 0.2362 (6.00)
Rocker Arm Shaft Bearing Inside Diameter (Wear Limit), in (mm) .............. 0.2379 (6.043)

Number of Valves .............. 2
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.004 (0.10)
Intake Valve Clearance, in (mm) .............. 0.0043-0.0075 (0.11-0.19)
Exhaust Valve Clearance, in (mm) .............. 0.0063-0.0094 (0.16-0.24)
Intake Valve Stem Outside Diameter (Std), in (mm) .............. 0.216 (5.48)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.2094 (5.318)
Exhaust Valve Stem Outside Diameter (Std), in (mm) .............. 0.214 (5.44)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.2077 (5.275)
Valve Guide Inside Diameter (Intake/Exhaust), in (mm) .............. 0.217 (5.50)
Valve Seat Width (Intake/Exhaust), in (mm) .............. 0.028 (0.70)
Valve Spring Free Length, in (mm) .............. 1.34 (34.00)
Intake Valve Head Diameter, in (mm) .............. 0.98 (25.00)
Exhaust Valve Head Diameter, in (mm) .............. 0.94 (24.00)

Piston Pin Bore Inside Diameter (Std), in (mm) .............. 0.5119 (13.002)
Piston Pin Bore Inside Diameter (Wear Limit), in (mm) .............. 0.5137 (13.048)
Piston Skirt Outside Diameter, in (mm) .............. 2.7159 (68.985)
Piston to Cylinder Bore Clearance, in (mm) .............. 0.0012-0.0028 (0.031-0.070)
Piston Pin Outside Diameter (Std), in (mm) .............. 0.5118 (13.000)
Piston Pin Outside Diameter (Wear Limit), in (mm) .............. 0.5100 (12.954)
Top Ring Width, in (mm) .............. 0.0591 (1.50)
Second Ring Width, in (mm) .............. 0.0591 (1.50)
Oil Ring Width, in (mm) .............. 0.0984 (2.50)
Top Ring Groove Side Clearance, in (mm) .............. 0.0014-0.0026 (0.035-0.065)
Second Ring Groove Side Clearance, in (mm) .............. 0.0006-0.0019 (0.015-0.049)
Top Ring End Gap, in (mm) .............. 0.008-0.014 (0.20-0.35)
Second Ring End Gap, in (mm) .............. 0.012-0.018 (0.30-0.45)
Oil Ring End Gap, in (mm) .............. 0.006-0.014 (0.15-0.35)
Ring End Gap (Wear Limit), in (mm) .............. 0.04 (1.00)

Cylinder Bore Inside Diameter (Max), in (mm) .............. 2.727 (69.165)
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.004 (0.10)
Intake Valve Clearance, in (mm) .............. 0.006±0.002 (0.15±0.04)
Exhaust Valve Clearance, in (mm) .............. 0.008±0.002 (0.20±0.04)
Engine Oil Type (Summer) .............. SAE 10W-30
Engine Oil Type (Winter) .............. SAE 5W-30
API Service Classifications .............. SF or SG
Oil Capacity, qts (L) .............. 0.58 (0.55)
Air Filter Element Part Number .............. 17211-ZL8-023
Spark Plug Type .............. NGK BPR6ES
Spark Plug Gap, in (mm) .............. 0.028-0.032 (0.70-0.80)
Module Air Gap, in (mm) .............. 0.008-0.024 (0.20-0.60)
Ignition Timing, deg .............. 20 BTDC

Main Jet .............. #70
Idle Fuel .............. 1-5/8 turns out
Float Height, in (mm) .............. 0.36 (9.20)
Low Idle Speed, rpm .............. 1700±150
High Idle Speed, rpm .............. 3100±150

Check Engine Oil Level .............. Every 10 hours
Clean Air Filter Element .............. Every 25 hours
Change Engine Oil .............. Every 50 hours
Check and Adjust Spark Plug .............. Every 100 hours
Clean Fuel Strainer .............. Every 100 hours
Check and Adjust Idle Speed .............. Every 100 hours
Check Carburetor Adjustments .............. Every 100 hours
Check and Adjust Valve Clearance .............. Every 100 hours
Replace Spark Plug .............. Every 200 hours
Replace Air Filter Element .............. Every 200 hours
Clean Combustion Chamber .............. Every 200 hours
Clean Fuel Lines .............. Every 200 hours

Oil Pan Bolt (M6x1.0), Nm (ft-lb) .............. 12 (9)
Connecting Rod Bolt (M7x1.0), Nm (ft-lb) .............. 12 (9)
Valve Adjusting Lock Nut (M5x0.5), Nm (ft-lb) .............. 8 (5.8)
Cylinder Head Cover Bolt (M6x1.0), Nm (ft-lb) .............. 12 (9)
Flywheel Nut (M14x1.5), Nm (ft-lb) .............. 75 (55)
Governor Arm Nut (M6x1.0), Nm (ft-lb) .............. 10 (7)
Breather Cover Bolt (M6x1.0), Nm (ft-lb) .............. 12 (9)
Air Cleaner Case Bolt (M6x1.0), Nm (ft-lb) .............. 10 (7)
Muffler Bolt (M6x1.0), Nm (ft-lb) .............. 12 (9)
Recoil Starter Nut (M6x1.0), Nm (ft-lb) .............. 8.5 (6.1)
Fan Cover Stud Bolt (M6x1.0), Nm (ft-lb) .............. 12 (9)
Fuel Valve Bracket Screw (M5x0.8), Nm (ft-lb) .............. 3 (2.2)
Governor Holder Bolt (M6x1.0), Nm (ft-lb) .............. 12 (9)
Spark Plug (M14x1.25), Nm (ft-lb) .............. 20 (14)

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