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
ModelGCV160 (vertical shaft)
Type4-stroke, OHV, single cylinder
Displacement160 cm 3 (9.8 cu-in)
Max. horsepower4.5 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
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 capacity1.1 l (0.29 US. Gal, 0.24 Imp. Gal.)
Fuel consumption230 g/HPh
PTO shaft rotationCounterclockwise (from PTO shaft side)

Dimensions and Weight

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 Stroke64 mm X 42 mm (2.5 x 1.7 in)
Sleeve internal diameter64.00 mm (2.52 in)
Piston skirt outer diameter63.969 mm (2.5185 in)
Number of piston rings (compression / oil):2 / 1
Ring side clearanceTop/second/oil0.015-0.045 mm (0.0006-0.0018 in)
Ring end gapTop0.20-0.35 mm (0.008-0.014 in)
Second0.30-0.45 mm (0.012-0.018 in)
Oil0.15-0.35 mm (0.006-0.014 in)
Ring widthTop/second1.5 mm (0.06 in)
Oil2.5 mm (0.10 in)
Connecting rod small end ID13.005 mm (0.512 in)
Connecting rod big end ID26.02 mm (1.024 in)
Crankpin outer diameter25.98 mm (1.023 in)
Main journal outer diameterPTO side27.993 mm (1.1021 in)
Flywheel side25.393 mm (0.9997 in)
Cylinder Head
Warpage (limit)0.10 mm (0.004 in)
Valve Arrangement:OHV
Stem outer diameter (standard):INTAKE5.480 mm (0.216 in)
EXHAUST5.44 mm (0.214 in)
Guide internal diameterINTAKE / EXHAUST5.5 mm (0.2165 in)
Spring free length34.0 mm (1.34 in)

Tightening torque specs

Tightening torque specs
Air cleaner case bolt10 Nm; 1.0 kg·m; 7 ft·lb
Connecting rod bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Valve adjusting lock nut8 Nm; 0.8 kg·m; 5.8 ft·lb
Cylinder head cover bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Oil drain plug bolt24 Nm; 2.4 kg·m; 17 ft·lb
Flywheel nut52 Nm; 5.3 kg·m; 38 ft·lb
Governor arm nut10 Nm; 1.0 kg·m; 7 ft·lb
Muffler bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Recoil starter nut8.5 Nm; 0.85 kg·m; 6.1 ft·lb
Fan cover stud bolt12 Nm; 1.2 kg·m; 8.6 ft·lb
Spark plug20 Nm; 2.0 kg·m; 14 ft·lb
5 mm bolts, nuts5.5 Nm; 0.55 kg·m; 4.0 ft·lb
6 mm bolts, nuts10 Nm; 1.0 kg·m; 7 ft·lb
8 mm bolts, nuts24 Nm; 2.4 kg·m; 17 ft·lb
10 mm bolts, nuts37 Nm; 3.7 kg·m; 27 ft·lb
12 mm bolts, nuts55 Nm; 5.5 kg·m; 39.5 ft·lb

Service Information

Maximum speed3,000 ± 150 rpm
Idle speed1,700 ± 150 rpm
Cylinder compression5.0 kg/cm2 (71 psi) at 600 rpm
Valve clearance
Intake valve0.15 ± 0.04 (0.006 ± 0.002)
Exhaust valve0.20 ± 0.04 (0.008 ± 0.002)
Oil system
Oil typeHonda 4-stroke or an equivalent (SE or SF)
Recommended oilSAE 10W-30
Oil capacity0.55 l (0.58 US. qt, 0.48 Imp. qt.)
Ignition system
Ignition timing20° B.T.D.C.
Spark plugNGK: BPR6ES
Spark plug gap0.7-0.8 mm (0.028-0.031 in)
Spark plug tightening torque20 Nm; 2.0 kg·m; 14 ft·lb
Primary ignition coil resistance1.0-1.2 kΩ
Secondary ignition coil resistance10.6-12.8 kΩ
Ignition coil air gap0.2-0.6 mm (0.008-0.024 in)
Main jet#65
Float height9.2 mm (0.36 in)
Pilot screw opening1 turns out
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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. Just to let you know that the stroke quoted in the specs is incorrect. Bore and stroke should be 64mm and 50mm respectively. What is quoted is correct for the GCV135. This can be verified by the calculation: 32 (1/2 bore) squared x pi (3.14159) x 50 (stroke). = 160cc

  5. 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.

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