Honda GS190A

Honda GS190AThe Honda GS190A is a small 0.18 l (187 cc, 11.4 cu.in.) single-cylinder air-cooled 4-stroke internal combustion gasoline engine with horizontal shaft, manufactured by Honda Motor Company for general-purpose applications.

The Honda GS190A engine has a single cylinder, compact combustion chamber, tough resin overhead cam for durability and quietness and uniblock construction reduce fuel consumption. The Honda GS190A engine has transistorized magneto ignition, horizontal type carburetor and recoil starter.

Cylinder bore and piston stroke is 69 mm (2.71 in) and 50.0 mm (2.0 in), respectively. Compression ratio is 8.5:1. It produces 4.4 kW (6.0 HP) at 3,600 rpm and 12.1 N·m (1.23 kg·m, 8.9 ft·lb) of torque at 2,500 rpm.

[adv-links-1]

General information

Engine Specifications
ModelGS190A
Type4-stroke, OHV, single cylinder
Displacement187 cm 3 (11.4 cu-in)
Max. horsepower6.0 HP (4.4 kW) at 3,600 rpm
Max. torque (crank PTO)12.1 N·m (1.23 kg·m, 8.9 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 capacity2.0 l (0.5 US.gal, 0.4 Imp. gal)
Fuel consumption230 g/HPh
PTO shaft rotationCounterclockwise (from PTO shaft side)

[adv-1]

Dimensions and Weight

GS190A Type Q
Length, mm (in)345 (13.6)
Width, mm (in)369 (14.5)
Height, mm (in)343 (13.5)
Dry weight, kg (lb)13.8 (30.4)
Operating weight, kg (lb)15.8 (34.8)

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)
EXHAUST5.44 mm (0.214 in)
Guide internal diameterINTAKE / EXHAUST5.5 mm (0.2165 in)
Spring free length34.0 mm (1.34 in)

[adv-2]

Tightening torque specs

Tightening torque specs
Crankcase cover12 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

[adv-links-2]

Service Information

Engine
Maximum speed3,850 ± 150 rpm
Idle speed1,400 ± 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#68
Float height9.2 mm (0.36 in)
Pilot screw opening1-3/4 turns out

[adv-5]

ATTENTION! Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

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.

Be the first to comment

Leave a Reply

Your email address will not be published.


*