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Kawasaki FH680V Engine
General Technical Data
Kawasaki FH680V Engine Specifications
Engine Model ..................... Kawasaki FH680V
Engine Type ..................... 4 Cycle, Forced Air-cooled, Vertical Shaft, OHV Gasoline
Gasoline Engine
Number of Cylinder ..................... 2
Cylinder Layout ..................... 90 deg V-Twin
Piston Displacement, cc (cu.in) ..................... 675 (41.2)
Engine Bore, mm (in) ..................... 75.2 (2.96)
Engine Stroke, mm (in) ..................... 76.0 (2.99)
Engine Power, Hp (kW) ..................... 23.0 (17.2)
Rated Engine Speed, rpm ..................... 3600
Maximum Torque, Nm (ft-lb) ..................... 54 (39.9)
Torque Speed, rpm ..................... 2400
Compression Ratio ..................... 8.1:1
Direction of Rotation ..................... Counterclockwise facing the PTO Shaft
Lubricating System Type ..................... Pressure feed by positive displacement pump
Oil Filter ..................... Cartridge type full flow filter
Ignition System Type ..................... Transistorized Flywheel Magneto
Charging Coil ..................... 12V-13 amps with regulator
Spark Plug ..................... NGK BPR4ES
Electrical System Rating, Volts ..................... 12
Electric Starter ..................... 12V-0.6 kW
Recommended Battery ..................... 12V-200CCA
Fuel System
Fuel System Type ..................... Carburetor
Carburetor Type ..................... Twin barrel, Float type with fixed main jet
Fuel Pump ..................... Diaphragm Type Pulse Pump
Fuel ..................... Unleaded gasoline
Governor ..................... Mechanical
Air Cleaner ..................... Dual element
Dimensions
Length, mm (in) ..................... 458 (18.1)
Width, mm (in) ..................... 430 (16.9)
Height, mm (in) ..................... 461 (18.1)
Dry weight, kg (lbs) ..................... 40.0 (88.5)
Kawasaki FH680V Maintenance Data
Cylinder Block and Valves
Cylinder Bore (Maximum), mm (in) ..................... 75.28 (2.9755)
Cylinder Compression (Minimum), kPa ..................... 386
Intake Valve Clearance (Cold), mm (in) ..................... 0.10-0.15 (0.0040-0.0059)
Exhaust Valve Clearance (Cold), mm (in) ..................... 0.10-0.15 (0.0040-0.0059)
Engine Oil and Filter
Engine Oil Type ..................... SAE 10W-30/10W-40, SAE 5W-20
Oil Classification ..................... SF, SG, SH, SJ or SL
Oil Capacity (w/o Filter), L (qts) ..................... 1.5 (1.6)
Oil Capacity (with New Filter), L (qts) ..................... 1.7 (1.8)
Oil Filter Part Number ..................... 49065-7010
Air Filter Part Number ..................... 11013-7027
Carburetor Specifications
Carburetor Model ..................... Nikki 621266
Throttle Bore Diameter, mm (in) ..................... 26.0 (1.02)
Venturi Diameter, mm (in) ..................... 21.0 (0.83)
Main Jet ..................... #116
Pilot Jet ..................... #43.8
Main Air Jet ..................... 1.4
Pilot Air Jet ..................... 0.8
Pilot Air Screw Turns Out ..................... 1-3/8
Float Level ..................... Float parallel to carburetor body
Low Idle Speed, rpm ..................... 1550 ± 100
High Idle Speed, rpm ..................... 3600 ± 100
Ignition System
Plug Type ..................... Champion RCJ8Y or NGK BPMR6A
Plug Gap, mm (in) ..................... 0.75 (0.0296)
Ignition Coil Air Gap, mm (in) ..................... 0.20-0.40 (0.0079-0.0158)
Service Intervals
Change Engine Oil ..................... Every 100 Hours
Change Oil Filter ..................... Every 200 Hours
Clean and Re-gap Spark Plug ..................... Every 100 Hours
Replace Spark Plug ..................... Every 300 Hours
Clean Air Cleaner Paper Element ..................... Every 50 Hours
Replace Air Cleaner Paper Element ..................... Every 200 Hours
Check Carburetor Adjustment ..................... Every 100 Hours
Check and Adjust Valve Clearance ..................... Every 300 Hours
Kawasaki FH680V Service Specifications
Cylinder Head and Valves
Cylinder head warp, mm (in) ..................... 0.05 (0.002)
Valve clearance (Intake, Exhaust), mm (in) ..................... 0.10-0.15 (0.0040-0.0059)
Valve seating surface angle (Intake, Exhaust), deg ..................... 45
Valve seating surface width (Intake), mm (in) ..................... 0.8-1.4 (0.03-0.06)
Valve seating surface width (Exhaust), mm (in) ..................... 1.1-1.6 (0.04-0.06)
Valve guide inside diameter (Intake, Exhaust), mm (in) ..................... 6.00-6.012 (0.2362-0.2367)
Valve head thickness (Intake, Exhaust), mm (in) ..................... 0.35 (0.014)
Valve stem runout (Intake, Exhaust), mm (in) ..................... 0.05 (0.002)
Valve stem diameter (Intake), mm (in) ..................... 5.95 (0.0234)
Valve stem diameter (Exhaust), mm (in) ..................... 5.93 (0.0233)
Valve guide inside diameter (Intake, Exhaust), mm (in) ..................... 6.08 (0.239)
Valve spring free length (Intake, Exhaust), mm (in) ..................... 31.0 (1.22)
Rocker arm push rod run out (Intake, Exhaust), mm (in) ..................... 0.5 (0.02)
Cylinder and Pistons
Cylinder compression, kPa (psi) ..................... 390 (57)
Cylinder inside diameter (Standard), mm (in) ..................... 75.28 (2.964)
Cylinder inside diameter (0.50 Oversize), mm (in) ..................... 75.78 (2.983)
Cylinder bore diameter (Standard), mm (in) ..................... 75.18-75.20 (2.960-2.961)
Cylinder bore diameter (0.50 Oversize), mm (in) ..................... 75.68-75.70 (2.979-2.980)
Cylinder bore out round, mm (in) ..................... 0.056 (0.0022)
Piston diameter, mm (in) ..................... 74.99 (2.952)
Piston top ring/groove clearance, mm (in) ..................... 0.18 (0.007)
Piston second ring/groove clearance, mm (in) ..................... 0.16 (0.006)
Piston ring thickness, mm (in) ..................... 1.40 (0.055)
Piston top ring end gap, mm (in) ..................... 0.65 (0.026)
Piston second ring end gap, mm (in) ..................... 0.78 (0.031)
Piston oil ring end gap, mm (in) ..................... 1.05 (0.041)
Piston pin outside diameter, mm (in) ..................... 15.96 (0.628)
Piston pin hole inside diameter, mm (in) ..................... 16.08 (0.633)
Connecting rod small end inside diameter, mm (in) ..................... 16.05 (0.632)
Cam lobe height, mm (in) ..................... 29.621 (1.166)
Crankshaft and Connecting Rod
Connecting rod big end width, mm (in) ..................... 19.90 (0.783)
Crankpin width, mm (in) ..................... 43.1 (1.697)
Connecting rod big end inside diameter, mm (in) ..................... 38.055 (1.498)
Crankpin outside diameter, mm (in) ..................... 37.94 (1.494)
Crankshaft journal diameter, mm (in) ..................... 39.896 (1.571)
Crankshaft journal bearing inside diameter, mm (in) ..................... 40.15 (1.581)
Kawasaki FH680V Tightening Torque Specs
Cylinder Head Bolts ..................... 25 Nm (19 ft-lb)
Valve Clearance Lock Screws ..................... 6.9 Nm (5.1 ft-lb)
Connecting Rod Big End ..................... 5.9 Nm (4.4 ft-lb)
Rocker Arm Bolts ..................... 28 Nm (20 ft-lb)
Rocker Cover Mounting Bolts ..................... 5.9 Nm (4.4 ft-lb)
Exhaust Pipe Flange Nuts ..................... 15 Nm (11 ft-lb)
Spark Plugs ..................... 22 Nm (16 ft-lb)
Drain Screw (Carburetor) ..................... 1.3 Nm (1.0 ft-lb)
Governor Arm Clamp Nut ..................... 7.8 Nm (5.8 ft-lb)
Intake Manifold Mounting Bolts ..................... 5.9 Nm (4.4 ft-lb)
Cleaner Body Mounting Screws ..................... 3.4 Nm (2.5 ft-lb)
Plug Bolt (Engine-shroud) ..................... 5.9 Nm (4.4 ft-lb)
Plug Screw (Engine-shroud) ..................... 3.4 Nm (2.5 ft-lb)
Choke Valve Screw ..................... 0.7 Nm (0.5 ft-lb)
Throttle Valve Screws ..................... 1.0 Nm (0.75 ft-lb)
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