Honda GX200T

Honda GX200TThe Honda GX200 T is a 196 cc (12.0 cu-in) single-cylinder inclined by 25° air-cooled 4-stroke internal combustion small gasoline engine with horizontal shaft manufactured by Honda Motor Company for general-purpose applications, such as pressure washers, commercial lawn and garden equipment, tillers and cultivators, generators, construction and industrial equipment, agricultural equipment, small vehicles, water pumps.

The Honda GX200 T engine has an OHV (overhead valve) design; high compression ratio for better fuel efficiency; horizontal type carburetor with butterfly valve; heavy duty recoil or electric starter and transistorized magneto ignition system.

The cylinder bore is 68.0 mm (2.7 in) and the piston stroke is 54.0 mm (2.1 in), compression ratio rating is 7.65:1 or 8.5:1. The GX200T engine produced 4.8 kW (6.5 HP) of horsepower at 3,600 rpm.

Maximum torque:

  • Crank P.T.O.: 13.2 N·m (1.35 kg·m, 9.8 ft·lb) at 2,500 rpm
  • With 1/2 reduction: 26.5 N·m (2.7 kg·m, 19.5 ft·lb) at 1,250 rpm
  • With 1/6 reduction: 79.5 N·m (8.1 kg·m, 58.6 ft·lb) at 420 rpm

General information

Engine Specifications
Type4-stroke, OHV, single cylinder inclined by 25°
Displacement198 cm 3 (12.0 cu-in)
Max. horsepower6.5 HP (4.8 kW) at 3,600 rpm
Max. torque (crank PTO)13.2 N·m (1.35 kg·m, 9.8 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 capacity3.6 L (0.95 US Gal, 0.79 Imp Gal.)
Fuel consumption230 g/PSh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Cylinder Block and Head

The Honda GX200 has cast iron cylinder sleeve, ball bearing supported forged steel crankshaft, improved piston design. Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency.

Cylinder block
Compression ratio:7.65:1 or 8.5:1
Bore x Stroke68 X 54 mm (2.7 x 2.1 in)
Sleeve internal diameter68.00 mm (2.68 in)
Piston skirt outer diameter67.985 mm (2.6766 in)
Number of piston rings (compression / oil):2 / 1
Ring side clearanceTop/Second0.015-0.045 mm (0.0006-0.0018 in)
Ring end gapTop/Second0.25-0.40 mm (0.010-0.016 in)
Ring widthTop/Second1.5 mm (0.06 in)
Connecting rod small end ID18.005 mm (0.7087 in)
Connecting rod big end ID30.02 mm (1.182 in)
Piston pin outer diameter13.0 mm (0.51 in)
Crankshaft crank pin outer diameter29.98 mm (1.180 in)
Cylinder Head
Warpage (limit)0.10 mm (0.004 in)
Valve Arrangement:OHV
Stem outer diameter (standard):INTAKE5.48 mm (0.216 in)
EXHAUST5.44 mm (0.214 in)
Valve spring free length:30.5 mm (1.20 in)
Camshaft outer diameter:13.984 mm (0.5506 in)
Cam height:INTAKE27.7 mm (1.09 in)
EXHAUST27.75 mm (1.093 in)

Tightening torque specs

Tightening torque specs
Connecting rod bolt12 Nm; 1.2 kg·m; 9 ft·lb
Cylinder head bolt24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut75 Nm; 7.5 kg·m; 54 ft·lb
Rocker arm pivot lock nut10 Nm; 1.0 kg·m; 7 ft·lb
Rocker arm pivot bolt24 Nm; 2.4 kg·m; 17 ft·lb
Crankcase cover bolt12 Nm; 1.2 kg·m; 9 ft·lb
Oil level switch joint nut10 Nm; 1.0 kg·m; 7 ft·lb
Oil drain bolt18 Nm; 1.8 kg·m; 13 ft·lb
Standard torque values
Bolt, nut (5 mm)5.5 Nm; 0.55 kg·m; 4.0 ft·lb
Bolt, nut (6 mm)10 Nm; 1.0 kg·m; 7 ft·lb
Bolt, nut (8 mm)24 Nm; 2.4 kg·m; 17 ft·lb
Bolt, nut (10 mm)37.5 Nm; 3.75 kg·m; 27 ft·lb
Bolt, nut (12 mm)55 Nm; 5.5 kg·m; 40 ft·lb

Service Information

Maximum speed3,900 ± 100 rpm
Idle speed1,400 ± 150 rpm
Cylinder compression3.6 kg/cm2 (51 psi) at 600 rpm
Valve clearance
Intake valve clearance0.15±0.02 mm (0.006±0.001 in)
Exhaust valve clearance0.20±0.02 mm (0.008±0.001 in)
Oil system
Oil typeHonda 4-stroke or an equivalent (SE or SF)
Recommended oilSAE 10W-30
Oil capacity0.6 L (0.63 US. qt, 0.53 Imp. qt.)
Main jet Externally-vent carb with dual-element silent air cleaner: #72
Externally-vent carb with oil bath or semi-dry air cleaner: #75
Internally-vent carb with dual-element silent air cleaner: #78
Internally-vent carb with cyclone air cleaner: #75
Float height13.7 mm (0.54 in)
Pilot screw opening Ext-vent carb with dual-element silent air cleaner: 2 turns out
Ext-vent carb with oil bath or semi-dry air cleaner: 2-1/4 turns out
Int-vent carb with dual-element silent air cleaner: 2-1/4 turns out
Int-vent carb with cyclone air cleaner: 2-1/4 turns out
Ignition system
Ignition timing20° B.T.D.C. (Fixed)
Spark plugNGK: BP6ES, BPR6ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Primary ignition coil resistance0.8-1.0 Ω
Secondary ignition coil resistance5.9-7.1 kΩ
Ignition coil air gap0.4 ± 0.2 (0.016 ± 0.008)
Starter motor
Brush length11.0 mm (0.43 in)
Mica depth1.6 mm (0.06 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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  1. Can I bore my 6.5 horsepower honda motor over any or not and do u guy make an after market go kart gas line and thottle set to convert the motor from a tiller to a go kart throttle

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