Honda GCV160

Honda GCV160The Honda GCV160 is a small (160 cc, 9.8 cu-in) single-cylinder air-cooled 4-stroke internal combustion gasoline engine with vertical shaft, manufactured by Honda Motor Company since 1997 for general-purpose applications such as: pressure washers, lawn mowers, agricultural equipment, forestry equipment.

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 GCV160 engine has transistorized magneto ignition, horizontal type carburetor, and recoil starter.

Cylinder bore and piston stroke are 64.0 mm (2.5 in) and 50.0 mm (2.0 in), respectively. The compression ratio rating is 8.5:1. It produces 4.5 PS (3.3 KW; 4.4 HP) at 3,600 rpm and 9.4 Nm (0.96 kg·m; 6.94 ft·lb) of torque at 2,500 rpm.

General information

Engine Specifications
Model GCV160 (vertical shaft)
Type 4-stroke, OHC, single cylinder
Displacement 160 cm 3 (9.8 cu-in)
Max. horsepower 4.5 PS (3.3 KW; 4.4 HP) at 3,600 rpm
Max. torque (crank PTO) 9.4 Nm (0.96 kg·m; 6.94 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 1.1 l (0.29 US. Gal, 0.24 Imp. Gal.)
Fuel consumption 230 g/HPh
PTO shaft rotation Counterclockwise (from PTO shaft side)

Dimensions and Weight

N1 N2 N3 N4
Length, mm (in) 367 (14.4)
Width, mm (in) 331 (13.0)
Height, mm (in) 360 (14.2) 347 (13.7) 365 (14.3) 347 (13.7)
Dry weight, kg (lb) 9.8 (21.6)
weight, kg (lb)
11.1 (24.5)

Cylinder Block and Head

Cylinder block
Compression ratio: 8.5:1
Bore x Stroke 64.0 mm X 50.0 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
Ring side clearance Top/second/oil 0.015-0.045 mm (0.0006-0.0018 in)
Ring end gap Top 0.20-0.35 mm (0.008-0.014 in)
Second 0.30-0.45 mm (0.012-0.018 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 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
Stem outer diameter (standard): INTAKE 5.480 mm (0.216 in)
EXHAUST 5.44 mm (0.214 in)
Guide internal diameter INTAKE / 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
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
Spark plug 20 Nm; 2.0 kg·m; 14 ft·lb
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

Maximum speed 3,000 ± 150 rpm
Idle speed 1,700 ± 150 rpm
Cylinder compression 5.0 kg/cm2 (71 psi) at 600 rpm
Valve clearance
Intake valve 0.15 ± 0.04 (0.006 ± 0.002)
Exhaust valve 0.20 ± 0.04 (0.008 ± 0.002)
Oil system
Oil type Honda 4-stroke or an equivalent (SE or SF)
Recommended oil SAE 10W-30
Oil capacity 0.55 l (0.58 US. qt, 0.48 Imp. qt.)
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 kΩ
Secondary ignition coil resistance 10.6-12.8 kΩ
Ignition coil air gap 0.2-0.6 mm (0.008-0.024 in)
Main jet #65
Float height 9.2 mm (0.36 in)
Pilot screw opening 1 turns out
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.

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.


  1. Automatic carburetor or chokes sucks. I bought 2 mowers with this honda engine thinking honda was top of the line. Run mower for 5 minutes. Stop to pick something up and the mower runs terrible until it sits and cools down half hour or so. Not at all efficient to get the job done

  2. Why does this site list a compression ratio of 8.5:1 in the cylinder block and head section, but then list compression as 71 psi in the service section?

  3. Ref the spark plug BPR6ES. Note the following (from the Honda Owners Manual GCV160)……
    BPR6ES (NGK) (pressure washer applications ONLY)
    BPR5ES (NGK (all other applications)

  4. GCV160 GJAEA-1290311 / Does anyone know the PTO bearing (oil pan) STD and Reject specification? I need to figure out if the oil plan bearing is still in spec after a bent crankshaft. Waiting on Honda Service Manual for the GCV160.

Leave a Reply

Your email address will not be published.