Honda GXV160

Honda GXV160The Honda GXV160 is a 163 cc (10.0 cu-in) single-cylinder air-cooled four-stroke internal combustion small gasoline engine with vertical shaft manufactured by Honda Motor Company for general-purpose applications, such as lawn mowers, commercial lawn and garden equipment, forestry equipment, construction and industrial equipment, agricultural equipment.

The Honda GXV160 engine has an OHV (overhead valve) design; high compression ratio for better fuel efficiency; horizontal type carburetor with butterfly valve; centrifugal mechanical governor; 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 45.0 mm (1.8 in), compression ratio rating is 8.0:1. The engine produced 5.5 HP (4.0 kW) of horsepower at 3,600 rpm and 10.8 Nm (1.1 kg·m, 7.96 ft·lb) of torque at 2,500 rpm.

General information

Engine Specifications
Model GXV160
Type 4-stroke, OHV, single cylinder
Displacement 163 cm 3 (9.9 cu-in)
Max. horsepower 5.5 HP (4.4 kW) at 3,600 rpm
Max. torque (crank PTO) 10.8 Nm (1.1 kg·m, 7.96 ft·lb) at 2,500 rpm
Carburetor Horizontal type, butterfly valve
Cooling system Forced-air
Ignition system Transistorized magneto ignition
Lubricating system Forced splash
Starting system Recoil starter / Self starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity 2.0 L (0.52 US qt)
Fuel consumption 250 g/HPh
PTO shaft rotation Counterclockwise (from PTO shaft side)

Cylinder Block and Head

The Honda GXV160 has cast iron cylinder sleeve, ball bearing supported forged steel crankshaft, improved piston design. The piston has two compression rings and one oil ring. Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency.

Cylinder block
Compression ratio: 8.0:1
Bore x Stroke 68 X 45 mm (2.7 x 1.8 in)
Sleeve internal diameter 68.000 mm (2.677 in)
Piston skirt outer diameter 67.985 mm (2.6766 in)
Number of piston rings (compression / oil): 2 / 1
Ring side clearance Top 0.030-0.065 mm (0.0012-0.0026 in)
Second 0.030-0.065 mm (0.0012-0.0026 in)
Ring end gap Top/Second 0.20-0.40 mm (0.008-0.016 in)
Oil 0.15-0.35 mm (0.006-0.014 in)
Ring width Top/Second 1.5 mm (0.06 in)
Oil 2.5 mm (0.10 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 18.0 mm (0.7087 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 5.480 mm (0.216 in)
EXHAUST 5.440 mm (0.214 in)
Valve spring free length: 34.0 mm (1.339 in)
Camshaft outer diameter: 13.984 mm (0.5506 in)
Cam height: INTAKE 27.70 mm (1.09 in)
EXHAUST 27.75 mm (1.093 in)

Tightening torque specs

Tightening torque specs
Connecting rod lower cap 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
Pivot adjusting nut 10 Nm; 1.0 kg·m; 7 ft·lb
Pivot bolt 24 Nm; 2.4 kg·m; 17 ft·lb
Oil filter extension 10 Nm; 1.0 kg·m; 7 ft·lb
Oil drain bolt 18 Nm; 1.8 kg·m; 13 ft·lb
Oil pan 24 Nm; 2.4 kg·m; 17 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

Engine
Maximum speed 3,200 ± 100 rpm
Idle speed 1,700 ± 150 rpm
Cylinder compression 5.0-8.0 kg/cm2 (71-114 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.)
Carburetor
Main jet #70
Float height 12.2-15.2 mm (0.48-0.60 in)
Pilot screw opening 2 turns out
Ignition system
Ignition timing 20° B.T.D.C. (Fixed)
Spark plug NGK: BP5ES, BPR5ES
NIPPONDENSO: W16EP-U, W16EPR-U
Spark plug gap 0.7-0.8 mm (0.028-0.031 in)
Primary ignition coil resistance 0.7-0.9 Ω
Secondary ignition coil resistance 6.3-7.7 kΩ
Ignition coil air gap 0.4 ± 0.2 (0.016 ± 0.008)
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6 Comments

  1. Just a little confused as to Engine speed rated at 3200 RPM, and horse power rated at 3600RPM and my mower HRU216 using same motor is only generating 2800RPM at full throttle.
    In the words of the late Professor Julius Sumner Miller why is it so?

  2. Would this Honda engine be a direct replacement for a BS #126L-02-1005 Series 675? Will it fit without and modifications?

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