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Honda GXV140 Engine

General Technical Data

Honda GXV140 Engine Specifications

Engine Model ............... Honda GXV140
Engine Type ............... 4-cycle 1-cylinder vertical shaft OHV small gasoline engine
Number of Cylinders ............... Single
Displacement, cu.in (cc) ............... 8.20 (135)
Engine Bore, in (mm) ............... 2.53 (64.0)
Engine Stroke, in (mm) ............... 1.67 (42.0)
Rated Engine Power, hp (kW) ............... 5.0 (3.2)
Rated Engine Speed, rpm ............... 3600
Maximum Torque, Nm (ft-lbs) ............... 10.3 (7.6)
Torque Speed, rpm ............... 2500
Compression ............... 8.0:1
Valve Arrangement ............... Overhead valve
Lubrication System ............... Forced splash type
Air Cleaner ............... Two-Stage
Cooling System ............... Forced air
Ignition System ............... CDI
Stopping System ............... Primary circuit ground
Starter Type ............... Recoil

Fuel System

Fuel System Type ............... Carburetor
Carburetor Type ............... Horizontal with butterfly valve
Governor Type ............... Centrifugal mechanical
Fuel Tank Capacity, qts (L) ............... 0.95 (1.00)
Fuel Type ............... Gasoline (86 or higher)

Dimensions and Weight

Overall Length, in (mm) ............... 15.6 (395)
Overall Width, in (mm) ............... 13.2 (335)
Overall Height, in (mm) ............... 13.4 (340)
Dry Weight, lbs (kg) ............... 25.3 (11.5)

Honda GXV140 Maintenance Data

Cylinder Block and Valves

Cylinder Bore Inside Diameter (Maximum), in (mm) ............... 2.562 (64.165)
Cylinder Compression, psi (kPa) ............... 86-121 (600-850)
Cylinder Head (Max. Out of Flatness), in (mm) ............... 0.004 (0.10)
Intake Valve Clearance, in (mm) ............... 0.006 (0.015)
Exhaust Valve Clearance, in (mm) ............... 0.008 (0.020)

Engine Oil and Filter

Engine Oil Type (Summer) ............... SAE 10W-30
Engine Oil Type (Winter) ............... SAE 5W-30
API Service Classifications ............... SE, SF or higher
Oil Capacity, qts (L) ............... 0.63 (0.60)
Air Filter Element Part Number ............... 17211-ZG9-M00

Carburetor Adjustment

Main Jet ............... #60
Idle Fuel ............... 1/2 turns out
Float Height, in (mm) ............... 0.48-0.60 (12.2-15.2)
Low Idle Speed, rpm ............... 2100±150
High Idle Speed, rpm ............... 3100±100

Ignition System

Spark Plug Type ............... NGK BPR5ES
Spark Plug Gap, in (mm) ............... 0.028-0.032 (0.70-0.80)
Module Air Gap, in (mm) ............... 0.008-0.020 (0.20-0.50)
Ignition Timing, deg ............... 25 BTDC
Spark Plug Torque, Nm (ft-lbs) ............... 20 (14)

Service Intervals

Clean Air Cleaner ............... Every 50 hours
Change Engine Oil ............... Every 100 hours
Check and Adjust Spark Plug ............... Every 100 hours
Check Carburetor Adjustment ............... Every 100 hours
Replace Air Cleaner (Paper Element) ............... Every 100 hours
Check and Adjust Valve Clearance ............... Every 300 hours
Replace Spark Plug ............... Every 300 hours

Honda GXV140 Service Data

Cylinder Block

Cylinder Bore Inside Diameter (Std), in (mm) ............... 2.52 (64.0)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) ............... 2.5262 (64.165)
Connecting Rod Small End Inside Diameter (Std), in (mm) ............... 0.5120 (13.005)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) ............... 0.515 (13.07)
Connecting Rod Big End Inside Diameter (Std), in (mm) ............... 1.024 (26.02)
Connecting Rod Big End Inside Diameter (Wear Limit), in (mm) ............... 1.0262 (26.066)
Connecting Rod Big End Oil Clearance, in (mm) ............... 0.0016-0.0025 (0.040-0.063)
Crank Pin Outside Diameter (Std), in (mm) ............... 1.023 (25.98)
Crank Pin Outside Diameter (Wear Limit), in (mm) ............... 1.021 (25.92)

Cylinder Head and Valves

Number of Valves ............... 2
Cylinder Head (Max. Out of Flatness), in (mm) ............... 0.004 (0.10)
Intake Valve Clearance, in (mm) ............... 0.005-0.007 (0.13-0.17)
Exhaust Valve Clearance, in (mm) ............... 0.007-0.009 (0.18-0.22)
Intake Valve Stem Outside Diameter (Std), in (mm) ............... 0.216 (5.48)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) ............... 0.2094 (5.318)
Exhaust Valve Stem Outside Diameter (Std), in (mm) ............... 0.214 (5.44)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) ............... 0.2077 (5.275)
Valve Guide Inside Diameter (Intake/Exhaust), in (mm) ............... 0.217 (5.50)
Intake Valve Guide To Stem Clearance, in (mm) ............... 0.0004-0.0016 (0.010-0.034)
Exhaust Valve Guide To Stem Clearance, in (mm) ............... 0.0020-0.0027 (0.050-0.070)
Valve Seat Width (Intake/Exhaust), in (mm) ............... 0.031 (0.80)
Valve Spring Free Length, in (mm) ............... 1.21 (30.50)
Cam Height (Intake), in (mm) ............... 1.095 (27.70)
Cam Height (Exhaust), in (mm) ............... 1.097 (27.75)

Piston and Piston Rings

Piston Pin Bore Inside Diameter (Std), in (mm) ............... 0.5119 (13.002)
Piston Pin Bore Inside Diameter (Wear Limit), in (mm) ............... 0.5137 (13.048)
Piston Skirt Outside Diameter, in (mm) ............... 2.5185 (63.969)
Piston to Cylinder Bore Clearance, in (mm) ............... 0.0006-0.0020 (0.015-0.050)
Piston Pin Outside Diameter (Std), in (mm) ............... 0.5118 (13.000)
Piston Pin Outside Diameter (Wear Limit), in (mm) ............... 0.5100 (12.954)
Top Compression Ring Width, in (mm) ............... 0.06 (1.52)
Second Compression Ring Width, in (mm) ............... 0.06 (1.52)
Top Compression Ring to Groove Side Clearance, in (mm) ............... 0.0006-0.0018 (0.015-0.045)
Second Compression Ring to Groove Side Clearance, in (mm) ............... 0.0006-0.0018 (0.015-0.045)
Top Compression Ring End Gap, in (mm) ............... 0.008-0.016 (0.20-0.40)
Second Compression Ring End Gap, in (mm) ............... 0.008-0.016 (0.20-0.40)
Ring End Gap (Wear Limit), in (mm) ............... 0.04 (1.00)

Honda GXV140 Tightening Torque Specs

Valve cover bolt (6x14x1.0) ............... 8.5 Nm (6.3 ft-lb)
Cylinder head bolt (8 x50x1.25) ............... 24 Nm (17.8 ft-lb)
Pivot adjusting nut (6x0.5) ............... 10 Nm (7.4 ft-lb)
Pivot arm pivot bolt (8x1.25) ............... 24 Nm (17.8 ft-lb)
Oil pan bolt (6x28x1.25) ............... 12 Nm (8.9 ft-lb)
Connecting rod bolt (7x1.0) ............... 12 Nm (8.9 ft-lb)
Air cleaner elbow bolt (6x100x1.0) ............... 8.5 Nm (6.3 ft-lb)
Muffler mounting bolt (6x85x1.0) ............... 10 Nm (7.4 ft-lb)
Recoil (fan cover) nut (6x1.25) ............... 8.5 Nm (6.3 ft-lb)
Flywheel nut (14x1.5) ............... 52 Nm (38.5 ft-lb)
Governor arm pinch nut (6x1.0) ............... 10 Nm (7.4 ft-lb)
Oil drain bolt (10x1.25) ............... 18 Nm (13.3 ft-lb)

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