Honda GXV340 Specifications
| Engine Model: Honda GXV340 |
| Engine Type: 4-cycle 1-cylinder OHV vertical shaft air-cooled gasoline |
| Total Displacement: 20.6 cu.in (337 cc) |
| Rated Engine Power: 11 Hp (8.2 kW) at 3600 rpm |
| Carburetor Type: Horizontal with butterfly valve |
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Engine Model .............. Honda GXV340
Engine Type .............. 4-cycle overhead valve single-cylinder air-cooled small gasoline engine
Number of Cylinders .............. 1
Displacement, cu.in (cc) .............. 20.6 (337)
Cylinder Bore, in (mm) .............. 3.24 (82.0)
Piston Stroke, in (mm) .............. 2.53 (64.0)
Rated Engine Power, hp (kW) .............. 11.0 (8.2)
Rated Engine Speed, rpm .............. 3600
Maximum Torque, Nm (ft-lbs) .............. 23.1 (16.9)
Torque Speed, rpm .............. 2500
Compression Ratio .............. 7.7:1
Valve Arrangement .............. OHV
PTO Shaft Rotation .............. Counterclockwise (from PTO side)
Lubrication System .............. Pressure and splash type
Air Cleaner .............. Dual element
Cooling System .............. Forced air
Ignition System .............. Transistor type magneto
Stopping System .............. Ignition primary circuit ground
Starting System .............. Recoil or electric starter
Fuel System Type .............. Carburetor
Carburetor Type .............. Horizontal, butterfly valve
Governor Type .............. Mechanical centrifugal
Fuel Tank Capacity, qts (L) .............. 2.4 (2.3)
Fuel Type .............. Gasoline (86 or higher)
Overall Length, in (mm) .............. 16.9 (430)
Overall Width, in (mm) .............. 15.2 (385)
Overall Height, in (mm) .............. 16.1 (410)
Dry Weight, lbs (kg) .............. 71.1 (32.0)
Cylinder Bore Inside Diameter (Std), in (mm) .............. 3.2281-3.2289 (82.000-82.015)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) .............. 3.235 (82.170)
Connecting Rod Small End Inside Diameter (Std), in (mm) .............. 0.7876 (20.005)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) .............. 0.790 (20.07)
Connecting Rod Big End Inside Diameter (Std), in (mm) .............. 1.4183 (36.025)
Connecting Rod Big End Inside Diameter (Wear Limit), in (mm) .............. 1.420 (36.07)
Connecting Rod Big End Oil Clearance, in (mm) .............. 0.0016-0.0026 (0.040-0.066)
Crankshaft Outside Diameter (Std), in (mm) .............. 1.4167 (35.985)
Crankshaft Outside Diameter (Wear Limit), in (mm) .............. 1.415 (35.93)
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) .............. 0.2589-0.2594 (6.575-6.590)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.254 (6.44)
Exhaust Valve Stem Outside Diameter (Std), in (mm) .............. 0.2573-0.2579 (6.535-6.550)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.252 (6.40)
Intake Valve Guide Inside Diameter, in (mm) .............. 0.2598-0.2604 (6.600-6.615)
Exhaust Valve Guide Inside Diameter, in (mm) .............. 0.2598-0.2604 (6.600-6.615)
Intake Valve Guide To Stem Clearance, in (mm) .............. 0.0004-0.0016 (0.010-0.040)
Exhaust Valve Guide To Stem Clearance, in (mm) .............. 0.0020-0.0031 (0.050-0.080)
Valve Seat Width (Intake/Exhaust), in (mm) .............. 0.04-0.05 (1.0-1.2)
Valve Spring Free Length, in (mm) .............. 1.54 (39.00)
Cam Height (Intake), in (mm) .............. 1.254-1.270 (31.85-32.25)
Cam Height (Exhaust), in (mm) .............. 1.243-1.259 (31.57-31.97)
Camshaft Outside Diameter (Std), in (mm) .............. 0.6286-0.6293 (15.966-15.984)
Camshaft Outside Diameter (Wear Limit), in (mm) .............. 0.627 (15.92)
Piston Pin Bore Inside Diameter (Std), in (mm) .............. 0.7875 (20.002)
Piston Pin Bore Inside Diameter (Wear Limit), in (mm) .............. 0.7891 (20.042)
Piston Skirt Outside Diameter, in (mm) .............. 3.2277 (81.985)
Piston to Cylinder Bore Clearance, in (mm) .............. 0.0006-0.0020 (0.015-0.052)
Piston Pin Outside Diameter (Std), in (mm) .............. 0.787 (20.000)
Piston Pin Outside Diameter (Wear Limit), in (mm) .............. 0.785 (19.95)
Top Ring Width, in (mm) .............. 0.08 (2.00)
Second Ring Width, in (mm) .............. 0.08 (2.00)
Top Ring Groove Side Clearance, in (mm) .............. 0.0012-0.0024 (0.030-0.060)
Second Ring Groove Side Clearance, in (mm) .............. 0.0012-0.0024 (0.030-0.060)
Oil Ring Groove Side Clearance, in (mm) .............. 0.0012-0.0024 (0.030-0.060)
Top Ring End Gap, in (mm) .............. 0.010-0.020 (0.20-0.40)
Second Ring End Gap, in (mm) .............. 0.010-0.020 (0.20-0.40)
Oil Ring End Gap, in (mm) .............. 0.010-0.020 (0.20-0.40)
Ring End Gap (Wear Limit), in (mm) .............. 0.04 (1.00)
Cylinder Bore Inside Diameter (Max), in (mm) .............. 3.235 (82.170)
Cylinder Compression, psi (kPa) .............. 85-121 (600-850)
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.004 (0.10)
Intake Valve Clearance, in (mm) .............. 0.006 (0.15)
Exhaust Valve Clearance, in (mm) .............. 0.008 (0.20)
Engine Oil Type (Summer) .............. SAE 10W-40
Engine Oil Type (Winter) .............. SAE 5W-30
API Service Classifications .............. SE or SF
Oil Capacity, qts (L) .............. 1.20 (1.10)
Spark Plug Type .............. NGK BPR5ES or Denso W16EPR-U
Spark Plug Gap, in (mm) .............. 0.028-0.032 (0.70-0.80)
Module Air Gap, in (mm) .............. 0.008-0.024 (0.20-0.60)
Ignition Timing, deg .............. 18-22 BTDC
Air Filter Element Part Number .............. 17210-ZE8-003
Main Jet .............. #88
Idle Fuel .............. 2-1/2 turns out
Float Height, in (mm) .............. 0.47-0.57 (11.9-14.5)
Low Idle Speed, rpm .............. 1400±150
High Idle Speed, rpm .............. 3400±150
Check Engine Oil Level .............. Every 10 hours
Clean Air Filter Element .............. Every 50 hours
Change Engine Oil .............. Every 100 hours
Check and Adjust Spark Plug .............. Every 100 hours
Check and Adjust Idle Speed .............. Every 200 hours
Check Carburetor Adjustments .............. Every 200 hours
Replace Spark Plug .............. Every 200 hours
Clean Fuel Filter .............. Every 200 hours
Replace Air Filter Element .............. Every 200 hours
Check and Adjust Valve Clearance .............. Every 200 hours
Clean Combustion Chamber .............. Every 250 hours
Clean Fuel Line .............. Every 250 hours
Oil Pan Bolt (M8x1.25), Nm (ft-lb) .............. 22-26 (15.9-18.8)
Cylinder Head Cover Bolt (M6x1.0), Nm (ft-lb) .............. 7-10 (5.1-7.2)
Cylinder Head Bolt (M10x1.25x80), Nm (ft-lb) .............. 32-38 (23.1-27.5)
Push Rod Pivot Bolt (M8x1.25), Nm (ft-lb) .............. 22-26 (15.9-18.8)
Connecting Rod Bolt (M8x1.25), Nm (ft-lb) .............. 12-16 (8.7-11.6)
Air Cleaner Nut (M6x1.0), Nm (ft-lb) .............. 7-10 (5.1-7.2)
Muffler Bolt (M8x1.25), Nm (ft-lb) .............. 22-26 (15.9-18.8)
Flywheel Nut (M16x1.5), Nm (ft-lb) .............. 110-120 (79.5-86.8)
Oil Drain Plug Bolt (M20x1.5), Nm (ft-lb) .............. 40-50 (28.9-36.2)
Exhaust Pipe Nut (M8x1.25), Nm (ft-lb) .............. 22-26 (15.9-18.8)
Spark Plug (M14x1.25), Nm (ft-lb) .............. 18-20 (12-14)
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