Honda GSV190

Honda GSV190The Honda GSV190 is a small 0.19 l (187 cc, 11.4 cu.in.) single-cylinder air-cooled 4-stroke internal combustion gasoline engine with vertical shaft, manufactured by Honda Motor Company for general-purpose applications, such as pressure washers, lawn mowers, commercial lawn and garden, forestry and agricultural equipment.

The Honda GSV190 engine is a commercial version of GCV190. The GSV190 has cast-iron cylinder sleeve, an extra bearing, two-stage air cleaner, and OHV design. The Honda GSV190 engine has transistorized magneto ignition, horizontal type carburetor with butterfly valve and recoil starter.

Cylinder bore and piston stroke is 69 mm (2.71 in) and 50.0 mm (2.0 in), respectively. Compression ratio rating is 8.5:1. The Honda GSV190 produces 4.8 kW (6.5 HP) at 3,600 rpm of maximum horsepower and 3.8 kW (5.1 HP) at 3,600 rpm of net power output. The torque is 11.3 Nm (1.15 kg·m, 8.3 ft·lb) at 2,500 rpm.

General information

Engine Specifications
ModelGSV190
Type4-stroke, OHV, single cylinder
Displacement187 cm 3 (11.4 cu-in)
Max. horsepower6.5 HP (4.8 kW) at 3,600 rpm
Max. torque (crank PTO)11.3 Nm (1.15 kg·m, 8.3 ft·lb) at 2,500 rpm
CarburetorHorizontal type, butterfly valve
Cooling systemForced-air
Ignition systemTransistorized magneto ignition
Lubricating systemSplash
Starting systemRecoil starter
Stoping systemIgnition primary circuit ground
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel tank capacity0.93 l (0.98 US. qts)
Fuel consumption230 g/HPh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

GSV190 Type N1
Length, mm (in)370.5 (14.6)
Width, mm (in)342.5 (13.5)
Height, mm (in)368 (14.5)
Dry weight, kg (lb)11.2 (24.7)
Operating weight, kg (lb)12.5 (27.6)

Cylinder Block and Head

Cylinder block
Compression ratio:8.5:1
Bore x Stroke69 mm X 50 mm (2.71 x 1.97 in)
Sleeve internal diameter69.00 mm (2.7165 in)
Piston skirt outer diameter68.985 mm (2.7159 in)
Number of piston rings (compression / oil):2 / 1
Ring side clearanceTop0.035-0.065 mm (0.0013-0.0026 in)
Second0.015-0.049 mm (0.0006-0.0019 in)
Ring end gapTop0.20-0.35 mm (0.008-0.014 in)
Second0.30-0.45 mm (0.012-0.018 in)
Oil0.15-0.35 mm (0.006-0.014 in)
Ring widthTop/second1.5 mm (0.06 in)
Oil2.5 mm (0.10 in)
Connecting rod small end ID13.005 mm (0.512 in)
Connecting rod big end ID30.02 mm (1.1819 in)
Crankpin outer diameter29.980 mm (1.1803 in)
Main journal outer diameterPTO side27.993 mm (1.1021 in)
Flywheel side25.393 mm (0.9997 in)
Cylinder Head
Warpage (limit)0.10 mm (0.004 in)
Valve Arrangement:OHV
Valves:2
Stem outer diameter (standard):INTAKE5.480 mm (0.216 in)
EXHAUST5.440 mm (0.214 in)
Guide internal diameterINTAKE / EXHAUST5.5 mm (0.2165 in)
Spring free length34.0 mm (1.34 in)
Valve head diameter:INTAKE25.0 mm (0.98 in)
EXHAUST24.0 mm (0.94 in)

Tightening torque specs

Tightening torque specs
Oil pan bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Connecting rod bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Valve adjusting lock nut8 Nm; 0.8 kg·m; 5.8 ft·lb
Cylinder head cover bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Oil drain plug bolt24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut75 Nm; 7.6 kg·m; 55 ft·lb
Governor arm nut10 Nm; 1.0 kg·m; 7 ft·lb
Muffler bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Recoil starter nut8.5 Nm; 0.85 kg·m; 6.1 ft·lb
Fan cover stud bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Spark plug20 Nm; 2.0 kg·m; 14 ft·lb

Service Information

Engine
Maximum speed3,100 ± 150 rpm
Idle speed1,700 ± 150 rpm
Cylinder compression5.0 kg/cm2 (71 psi) at 600 rpm
Valve clearance
Intake valve0.15 ± 0.04 (0.006 ± 0.002)
Exhaust valve0.20 ± 0.04 (0.008 ± 0.002)
Oil system
Oil typeHonda 4-stroke or an equivalent (SE or SF)
Recommended oilSAE 10W-30
Oil capacity0.55 l (0.58 US.qt.)
Ignition system
Ignition timing20° B.T.D.C.
Spark plugNGK: BPR6ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Primary ignition coil resistance1.0-1.2 kΩ
Secondary ignition coil resistance10.6-12.8 kΩ
Ignition coil air gap0.2-0.6 mm (0.008-0.024 in)
Carburetor
Main jet#70
Float height9.2 mm (0.36 in)
Pilot screw opening1-5/8 turns out
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