The Honda GC160 is an 160 cc (9.8 cu-in) single-cylinder, air-cooled, four-stroke internal combustion gasoline engine with horizontal shaft, manufactured by Honda Motor Company since 1997 for general-purpose applications.
This engine has a single-cylinder, compact combustion chamber, tough resin overhead cam for durability and quietness and uniblock construction reduce fuel consumption. The Honda GC160 engine has transistorized magneto ignition, horizontal type carburetor, and recoil starter.
A 64 mm (2.5 in) cylinder bore and 50 mm (2.0 in) piston stroke give the engine a total of 160 cc (9.8 cu-in) of displacement. The compression ratio rating is 8.5:1.
It produces 5.0 PS (3.7 KW; 5.0 HP) at 3,600 rpm and 10.3 Nm (1.05 kg·m; 7.6 lbf·ft) at 2,500 rpm of peak torque.
General information
| Engine Specifications | |
| Model | GC160 |
| Type | 4-stroke, OHC, single cylinder |
| Displacement | 160 cm 3 (9.8 cu-in) |
| Max. horsepower | 5.0 PS (3.7 KW; 5.0 HP) at 3,600 rpm |
| Max. torque (crank PTO) | 10.3 Nm (1.05 kg·m; 7.6 lbf·ft) 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 | 2.0 liters (2.11 US.qts, 1.76 Imp. qts) |
| Fuel consumption | 230 g/HPh |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions and Weight
| S | Q | W | V | P | ||||
| Length, mm (in) | 328 (12.9) | 337 (13.3) | 354 (13.9) | 347 (13.6) | 337 (13.3) | |||
| Width, mm (in) | 369 (14.5) | |||||||
| Height, mm (in) | 331 (13.0) | |||||||
| Dry weight, kg (lb) | 11.5 (25.4) | |||||||
| Operating weight, kg (lb) |
13.5 (29.8) | |||||||
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | 8.5:1 | |
| Bore x Stroke | 64 mm X 50 mm (2.5 x 2.0 in) | |
| Sleeve internal diameter | 64.00 mm (2.52 in) | |
| Piston skirt outer diameter | 63.969 mm (2.5185 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Piston ring side clearance (Top): | 0.015-0.045 mm (0.0006-0.0018 in) | |
| Piston ring side clearance (Second): | 0.015-0.045 mm (0.0006-0.0018 in) | |
| Piston ring side clearance (Oil): | 0.015-0.045 mm (0.0006-0.0018 in) | |
| Piston ring end gap (Top): | 0.200-0.350 mm (0.008-0.014 in) | |
| Piston ring end gap (Second): | 0.300-0.450 mm (0.012-0.018 in) | |
| Piston ring end gap (Oil): | 0.150-0.350 mm (0.006-0.014 in) | |
| Ring width (Top): | 1.5 mm (0.06 in) | |
| Ring width (Second): | 1.5 mm (0.06 in) | |
| Ring width (Oil): | 2.5 mm (0.10 in) | |
| Connecting rod small end ID | 13.005 mm (0.512 in) | |
| Connecting rod big end ID | 26.02 mm (1.024 in) | |
| Crankpin outer diameter | 25.98 mm (1.023 in) | |
| Main journal outer diameter |
PTO side: 27.993 mm (1.1021 in) Flywheel side: 25.393 mm (0.9997 in) |
|
| Cylinder Head | ||
| Warpage (limit) | 0.10 mm (0.004 in) | |
| Valve Arrangement: | OHC | |
| Valves: | 2 | |
| Valve stem outer diameter (INTAKE): | 5.480 mm (0.216 in) | |
| Valve stem outer diameter (EXHAUST): | 5.440 mm (0.214 in) | |
| Valve guide inner diameter (INTAKE): | 5.5 mm (0.2165 in) | |
| Valve guide inner diameter (EXHAUST): | 5.5 mm (0.2165 in) | |
| Spring free length | 34.0 mm (1.34 in) | |
Tightening torque specs
| Tightening torque specs | |
| Air cleaner case bolt | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Crankcase cover bolt | 12 Nm; 1.2 kg·m; 8.6 ft·lb |
| Connecting rod bolt | 12 Nm; 1.2 kg·m; 8.6 ft·lb |
| Valve adjusting lock nut | 8 Nm; 0.8 kg·m; 5.8 ft·lb |
| Cylinder head cover bolt | 12 Nm; 1.2 kg·m; 8.6 ft·lb |
| Oil drain plug bolt | 24 Nm; 2.4 kg·m; 17 ft·lb |
| Flywheel nut | 52 Nm; 5.3 kg·m; 38 ft·lb |
| Governor arm nut | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Muffler bolt | 12 Nm; 1.2 kg·m; 8.6 ft·lb |
| Recoil starter nut | 8.5 Nm; 0.85 kg·m; 6.1 ft·lb |
| Fan cover stud bolt | 12 Nm; 1.2 kg·m; 8.6 ft·lb |
| Fuel tank bolt, nut | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Spark plug | 20 Nm; 2.0 kg·m; 14 ft·lb |
| Others | |
| 5 mm bolts, nuts | 5.5 Nm; 0.55 kg·m; 4.0 ft·lb |
| 6 mm bolts, nuts | 10 Nm; 1.0 kg·m; 7 ft·lb |
| 8 mm bolts, nuts | 24 Nm; 2.4 kg·m; 17 ft·lb |
| 10 mm bolts, nuts | 37 Nm; 3.7 kg·m; 27 ft·lb |
| 12 mm bolts, nuts | 55 Nm; 5.5 kg·m; 39.5 ft·lb |
Service Information
| Engine | |
| Maximum speed | 3,850 ± 150 rpm |
| Idle speed | 1,400 ± 150 rpm |
| Cylinder compression | 5.0 kg/cm2 (71 psi) at 600 rpm |
| Valve clearance | |
| Intake valve | 0.15 ± 0.04 mm (0.006 ± 0.002 in) |
| Exhaust valve | 0.20 ± 0.04 mm (0.008 ± 0.002 in) |
| Oil system | |
| Oil type | Honda 4-stroke or an equivalent (SE or SF) |
| Recommended oil | SAE 10W-30 |
| Oil capacity | 0.58 liters (0.6 US.qts, 0.5 Imp. qts) |
| Ignition system | |
| Ignition timing | 20° B.T.D.C. |
| Spark plug | NGK: BPR6ES |
| Spark plug gap | 0.7-0.8 mm (0.028-0.031 in) |
| Spark plug tightening torque | 20 Nm; 2.0 kg·m; 14 ft·lb |
| Primary ignition coil resistance | 1.0-1.2 Ω |
| Secondary ignition coil resistance | 10.6-12.8 kΩ |
| Ignition coil air gap | 0.2-0.6 mm (0.008-0.024 in) |
| Carburetor | |
| Main jet | #65 |
| Float height | 9.2 mm (0.36 in) |
| Pilot screw opening | 1-3/4 turns out |
Author:
I would like to know if the Honda GC160 engine can be assembled on the chassis of the Honda tiller with the same type of engine. Thanks
As I know, it’s the same engine, only the PTO shaft should be of the same type, but this is only my opinion, it is better to clarify this in the official service center.
It can because I did it the other day
Bei meinem Honda GC 160 5,0 ist die Starteinrichtung ,Seilzug,beschädigt. Wo bekomme ich Ersatz?
Y a t’il un filtre à essesnce entre le réservoir et le carburateur
I was wondering if somebody could tell me what the crankshaft end play spec is on the GC160 grabbing the crankshaft and moving it for and aft there is a little bit of movement but I don’t know what the tolerance is any help is greatly appreciated