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
Model GX200T
Type 4-stroke, OHV, single cylinder inclined by 25°
Displacement 198 cm 3 (12.0 cu-in)
Max. horsepower 6.5 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
Carburetor Horizontal type, butterfly valve
Cooling system Forced-air
Ignition system Transistorized magneto ignition
Lubricating system Splash
Starting system Recoil starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 3.6 L (0.95 US Gal, 0.79 Imp Gal.)
Fuel consumption 230 g/PSh
PTO shaft rotation Counterclockwise (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 Stroke 68 X 54 mm (2.7 x 2.1 in)
Sleeve internal diameter 68.00 mm (2.68 in)
Piston skirt outer diameter 67.985 mm (2.6766 in)
Number of piston rings (compression / oil): 2 / 1
Ring side clearance Top/Second 0.015-0.045 mm (0.0006-0.0018 in)
Ring end gap Top/Second 0.25-0.40 mm (0.010-0.016 in)
Ring width Top/Second 1.5 mm (0.06 in)
Connecting rod small end ID 18.005 mm (0.7087 in)
Connecting rod big end ID 30.02 mm (1.182 in)
Piston pin outer diameter 13.0 mm (0.51 in)
Crankshaft crank pin outer diameter 29.98 mm (1.180 in)
Cylinder Head
Warpage (limit) 0.10 mm (0.004 in)
Valve Arrangement: OHV
Valves: 2
Stem outer diameter (standard): INTAKE 5.48 mm (0.216 in)
EXHAUST 5.44 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: INTAKE 27.7 mm (1.09 in)
EXHAUST 27.75 mm (1.093 in)

Tightening torque specs

Tightening torque specs
Connecting rod bolt 12 Nm; 1.2 kg·m; 9 ft·lb
Cylinder head bolt 24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut 75 Nm; 7.5 kg·m; 54 ft·lb
Rocker arm pivot lock nut 10 Nm; 1.0 kg·m; 7 ft·lb
Rocker arm pivot bolt 24 Nm; 2.4 kg·m; 17 ft·lb
Crankcase cover bolt 12 Nm; 1.2 kg·m; 9 ft·lb
Oil level switch joint nut 10 Nm; 1.0 kg·m; 7 ft·lb
Oil drain bolt 18 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 speed 3,900 ± 100 rpm
Idle speed 1,400 ± 150 rpm
Cylinder compression 3.6 kg/cm2 (51 psi) at 600 rpm
Valve clearance
Intake valve clearance 0.15±0.02 mm (0.006±0.001 in)
Exhaust valve clearance 0.20±0.02 mm (0.008±0.001 in)
Oil system
Oil type Honda 4-stroke or an equivalent (SE or SF)
Recommended oil SAE 10W-30
Oil capacity 0.6 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 height 13.7 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 timing 20° B.T.D.C. (Fixed)
Spark plug NGK: BP6ES, BPR6ES
Spark plug gap 0.7-0.8 mm (0.028-0.031 in)
Primary ignition coil resistance 0.8-1.0 Ω
Secondary ignition coil resistance 5.9-7.1 kΩ
Ignition coil air gap 0.4 ± 0.2 (0.016 ± 0.008)
Starter motor
Brush length 11.0 mm (0.43 in)
Mica depth 1.6 mm (0.06 in)
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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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