Honda GX360 Specifications
| Engine Model: Honda GX360 |
| Engine Type: 4-cycle two-cylinder OHC liquid-cooled gasoline |
| Total Displacement: 21.9 cu.in (359 cc) |
| Rated Engine Power: 13 Hp (9.6 kW) at 3600 rpm |
| Carburetor Type: Horizonal with butterfly valve |
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Engine Model .............. Honda GX360
Engine Type .............. 4-cycle 2-cylinder liquid-cooled small gasoline engine
Number of Cylinders .............. 2
Displacement, cu.in (cc) .............. 21.9 (359)
Cylinder Bore, in (mm) .............. 2.28 (58.0)
Piston Stroke, in (mm) .............. 2.68 (68.0)
Rated Engine Power, hp (kW) .............. 13.0 (9.6)
Rated Engine Speed, rpm .............. 3600
Maximum Torque, Nm (ft-lbs) .............. 25.7 (19.0)
Torque Speed, rpm .............. 3000
Compression Ratio .............. 8.5:1
Valve Arrangement .............. Overhead camshaft
Lubrication System .............. Forced oil by trochoid pump
Air Cleaner .............. Dual element
Cooling System .............. Liquid-cooled
Coolant Capacity, qts (L) .............. 2.54 (2.40)
Ignition System .............. Transistorized
Stopping System .............. Primary circuit ground
Starting System .............. Electric starter
Fuel System Type .............. Carburetor
Carburetor Type .............. Horizonal, butterfly valve
Governor Type .............. Centrifugal
Fuel Type .............. Gasoline (86 or higher)
Overall Length, in (mm) .............. 20.3 (515)
Overall Width, in (mm) .............. 19.3 (490)
Overall Height, in (mm) .............. 20.9 (530)
Dry Weight, lbs (kg) .............. 100 (45.0)
Operating Weight, lbs (kg) .............. 107 (48.5)
Cylinder Bore Inside Diameter (Std), in (mm) .............. 2.8300-2.8306 (58.000-57.015)
Cylinder Bore Inside Diameter (Wear Limit), in (mm) .............. 2.2874 (58.100)
Connecting Rod Small End Inside Diameter (Std), in (mm) .............. 0.552 (14.016)
Connecting Rod Small End Inside Diameter (Wear Limit), in (mm) .............. 0.554 (14.070)
Connecting Rod Big End Oil Clearance (Std), in (mm) .............. 0.001 (0.025)
Connecting Rod Big End Oil Clearance (Wear Limit), in (mm) .............. 0.002 (0.045)
Crankshaft Pin Outside Diameter (Pin), in (mm) .............. 1.2598 (32.000)
Crankshaft Pin Outside Diameter (Main), in (mm) .............. 1.2996 (33.009)
Crankshaft Main Bearing Oil Clearance, in (mm) .............. 0.001-0.002 (0.02-0.04)
Crankshaft Side Clearance, in (mm) .............. 0.008-0.016 (0.20-0.40)
Camshaft Journal Outside Diameter (Std), in (mm) .............. 0.629 (15.980)
Camshaft Journal Outside Diameter (Wear Limit), in (mm) .............. 0.626 (15.900)
Rocker Arm Inside Diameter (Std), in (mm) .............. 0.512 (13.015)
Rocker Arm Shaft Outside Diameter (Std), in (mm) .............. 0.510 (12.957)
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.004 (0.10)
Intake Valve Clearance, in (mm) .............. 0.004-0.006 (0.10-0.14)
Exhaust Valve Clearance, in (mm) .............. 0.004-0.006 (0.10-0.14)
Intake Valve Stem Outside Diameter (Std), in (mm) .............. 0.216 (5.480)
Intake Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.209 (5.320)
Exhaust Valve Stem Outside Diameter (Std), in (mm) .............. 0.215 (5.450)
Exhaust Valve Stem Outside Diameter (Wear Limit), in (mm) .............. 0.208 (5.290)
Intake Valve Guide Inside Diameter, in (mm) .............. 0.217 (5.500)
Exhaust Valve Guide Inside Diameter, in (mm) .............. 0.217 (5.500)
Valve Seat Width (Intake/Exhaust), in (mm) .............. 0.030 (0.70)
Valve Spring Free Length, in (mm) .............. 1.14 (29.00)
Cam Height (Intake), in (mm) .............. 1.024 (26.00)
Cam Height (Exhaust), in (mm) .............. 1.020 (25.90)
Piston Pin Bore Inside Diameter (Std), in (mm) .............. 0.5512 (14.000)
Piston Pin Bore Inside Diameter (Wear Limit), in (mm) .............. 0.5490 (13.954)
Piston Skirt Outside Diameter, in (mm) .............. 2.2820 (57.970)
Piston to Cylinder Bore Clearance, in (mm) .............. 0.0-0.002 (0.0-0.05)
Piston Pin Outside Diameter (Std), in (mm) .............. 0.5116-0.5118 (12.994-13.000)
Piston Pin Outside Diameter (Wear Limit), in (mm) .............. 0.5100 (12.954)
Pin Hole Inside Diameter (Std), in (mm) .............. 0.5514 (14.005)
Pin Hole Inside Diameter (Wear Limit), in (mm) .............. 0.553 (14.055)
Top Ring Width, in (mm) .............. 0.047 (1.19)
Second Ring Width, in (mm) .............. 0.047 (1.19)
Top Ring Groove Side Clearance, in (mm) .............. 0.001 (0.03)
Second Ring Groove Side Clearance, in (mm) .............. 0.001 (0.03)
Top Ring End Gap, in (mm) .............. 0.008 (0.20)
Second Ring End Gap, in (mm) .............. 0.008 (0.20)
Ring End Gap (Wear Limit), in (mm) .............. 0.024 (0.60)
Cylinder Bore Inside Diameter (Max), in (mm) .............. 2.2874 (58.100)
Cylinder Compression, psi (kPa) .............. 171 (1200)
Cylinder Head (Max Out of Flatness), in (mm) .............. 0.004 (0.10)
Intake Valve Clearance, in (mm) .............. 0.004-0.006 (0.10-0.14)
Exhaust Valve Clearance, in (mm) .............. 0.004-0.006 (0.10-0.14)
Engine Oil Type (Summer) .............. SAE 10W-40
Engine Oil Type (Winter) .............. SAE 5W-30
API Service Classifications .............. SE or SF
Oil Capacity, qts (L) .............. 1.48 (1.40)
Oil Filter Part Number .............. 15400-ZZ3-003
Air Filter Part Number .............. 17210-ZA0-702
Spark Plug Type .............. NGK BPR4HS
Spark Plug Gap, in (mm) .............. 0.024-0.028 (0.60-0.70)
Module Air Gap, in (mm) .............. 0.008-0.024 (0.20-0.60)
Ignition Timing, deg .............. 22-26 BTDC
Main Jet .............. #88
Idle Fuel .............. 1-1/4 turns out
Float Height, in (mm) .............. 0.52 (13.2)
Low Idle Speed, rpm .............. 1300±150
High Idle Speed, rpm .............. 3600±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
Clean Fuel Filter .............. Every 100 hours
Clean Radiator Core .............. Every 100 hours
Replace Engine Oil Filter .............. Every 200 hours
Check and Adjust Idle Speed .............. Every 300 hours
Check Carburetor Adjustments .............. Every 300 hours
Replace Spark Plug .............. Every 300 hours
Replace Fuel Filter .............. Every 300 hours
Replace Air Filter Element .............. Every 300 hours
Check and Adjust Valve Clearance .............. Every 300 hours
Clean Combustion Chamber .............. Every 500 hours
Clean Fuel Line .............. Every 500 hours
Change Radiator Coolant .............. Every 500 hours
Cylinder head to cylinder block (8x1.25), Nm (ft-lb) .............. 22.5 (16.3)
Crankcase to cylinder block (8x1.25), Nm (ft-lb) .............. 22.5 (16.3)
Crankcase to cylinder block (6x1.0), Nm (ft-lb) .............. 10 (7.2)
Connecting rod to connecting rod cap (7x0.75), Nm (ft-lb) .............. 22 (15.9)
Flywheel to crankshaft (16x1.5), Nm (ft-lb) .............. 115 (83.2)
Timing pulley to crankshaft (30x1.0), Nm (ft-lb) .............. 22.5 (16.3)
Camshaft pulley to camshaft (10x1.25), Nm (ft-lb) .............. 35 (25.3)
Cylinder head cover to head (6x1.0), Nm (ft-lb) .............. 10 (7.2)
Exhaust manifold to cylinder head (8x1.25), Nm (ft-lb) .............. 22 (15.9)
Intake manifold to cylinder head (6x1.0), Nm (ft-lb) .............. 10 (7.2)
Governor arm to shaft (6x1.0), Nm (ft-lb) .............. 10 (7.2)
Water pump assy to cylinder block (6x1.0), Nm (ft-lb) .............. 10 (7.2)
Governor case to cylinder head (6x1.0), Nm (ft-lb) .............. 10 (7.2)
Cooling fan to shaft (8x1.25), Nm (ft-lb) .............. 22.5 (16.3)
Air cleaner elbow to carburetor stud (6x1.0), Nm (ft-lb) .............. 8.5 (6.1)
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