Kawasaki FD501D Engine

General Technical Data

Kawasaki FD501D Engine Specifications

Engine Model .............. Kawasaki FD501D
Engine Type .............. 4-cycle vertical shaft liquid cooled gasoline engine
Number of Cylinders .............. 2
Cylinder Layout .............. 90 deg, V-Twin
Displacement, cc (cu.in) .............. 437 (26.7)
Cylinder Bore, mm (in) .............. 67.0 (2.64)
Piston Stroke, mm (in) .............. 62.0 (2.44)
Rated Engine Power, hp (kW) .............. 16.0 (11.9)
Rated Engine Speed, rpm .............. 3600
Maximum Torque, Nm (ft-lbs) .............. 32.6 (23.7)
Torque Speed, rpm .............. 2800
Compression Ratio .............. 9.3:1
Direction of Rotation .............. Counterclockwise (from PTO-shaft)
Lubrication System .............. Full pressure
Oil Filter Type .............. Full flow cartridge
Air Cleaner Type .............. Dual stage element
Cooling System .............. Pressurized forced circulation type
Coolant Capacity, L (qts) .............. 2.0 (2.1)
Ignition System .............. Battery, full transistor, fixed timing type
Starting System .............. Electric starter
Electrical System Rating, Volts .............. 12

Fuel System

Fuel System .............. Carburetor
Carburetor Type .............. Float with fixed main jet
Fuel Pump Type .............. Diaphragm, mechanical
Governor Type .............. Mechanical
Fuel Tank Capacity, L (qts) .............. 7.5 (7.9)
Fuel Type .............. Gasoline (86 or higher)

Dimensions and Weight

Overall Length, mm (in) .............. 523 (20.6)
Overall Width, mm (in) .............. 385 (15.2)
Overall Height, mm (in) .............. 481 (18.9)
Net weight, kg (lbs) .............. 35.2 (77.6)

Kawasaki FD501D Maintenance Data

Cylinder Block and Valves

Cylinder Compression, kpa (psi) .............. 1170 (170)
Cylinder Bore Inside Diameter (Max), mm (in) .............. 67.05 (2.5712)
Cylinder Head (Max Out of Flatness), mm (in) .............. 0.06 (0.002)
Intake Valve Clearance, mm (in) .............. 0.15 (0.006)
Exhaust Valve Clearance, mm (in) .............. 0.15 (0.006)
High Idle Speed, rpm .............. 3500±100
Low Idle Speed, rpm .............. 1500±50

Engine Oil and Filters

Engine Oil Type .............. SAE 10W-30, 10W-40, 5W-20
API Service Classifications .............. SD, SE, SF, or higher
Oil Capacity, L (qts) .............. 1.8 (1.9)
Oil Filter Part Number .............. 49065-7007
Air Filter Element Part Number .............. 11013-2162
Air Filter Pre-Cleaner Part Number .............. 11013-2161

Ignition System

Spark Plug Type .............. NGK BP6ES
Spark Plug Gap, mm (in) .............. 0.6-0.7 (0.024-0.028)
Coil Air Gap, mm (in) .............. 0.3-1.2 (0.012-0.047)
Spark Plug Torque, Nm (ft-lb) .............. 17 (12.6)

Carburetor Adjustment

Carburetor .............. Mikuni BV24-18
Bore Diameter, mm (in) .............. 24.0 (0.95)
Venturi Diameter, mm (in) .............. 18.0 (0.71)
Main Jet .............. #112.5
Pilot Jet .............. #47.5
Main Air Jet .............. 1.2
Pilot Air Jet .............. 1.0
Pilot Screw Setting .............. 1-3/8 turns out

Service Intervals

Check Engine Oil Level .............. Every 10 hours
Service Air Filter Pre-Cleaner .............. Every 25 hours
Clean Fuel Filter .............. Every 50 hours
Check Carburetor Adjustment .............. Every 50 hours
Check and Adjust Idle Speed .............. Every 50 hours
Change Engine Oil .............. Every 100 hours
Clean and Adjust Spark Plug .............. Every 100 hours
Service Air Filter Element .............. Every 100 hours
Replace Engine Oil Filter .............. Every 200 hours
Check Radiator and Hoses .............. Every 200 hours
Check and Adjust Valve Clearance .............. Every 300 hours
Clean Combustion Chamber .............. Every 300 hours
Replace Spark Plug .............. Every 300 hours
Replace Air Filter Element .............. Every 300 hours
Clean Fuel Hose .............. Every 300 hours
Change Engine Coolant .............. Every 400 hours

Kawasaki FD501D Service Specifications

Cylinder Block

Cylinder Bore Inside Diameter (Std), mm (in) .............. 66.98-67.00 (2.637-2.638)
Cylinder Bore Inside Diameter (Max), mm (in) .............. 67.06 (2.640)
Rebore Cylinder Diameter (0.50 Oversize), mm (in) .............. 67.46-67.48 (2.656-2.657)
Crankshaft Bearing Inside Diameter, mm (in) .............. 31.06 (1.223)
Crankshaft Journal Outside Diameter, mm (in) .............. 29.92 (1.178)
Connecting Rod Journal Inside Diameter, mm (in) .............. 30.93 (1.218)
Piston Pin Outside Diameter, mm (in) .............. 15.98 (0.629)
Piston Pin Bore Inside Diameter, mm (in) .............. 16.04 (0.631)
Piston Pin Bearing Inside Diameter, mm (in) .............. 16.05 (0.632)
Piston Outside Diameter, mm (in) .............. 66.950-66.965 (2.6358-2.6364)
Piston To Cylinder Bore Clearance, mm (in) .............. 0.015-0.150 (0.00059-0.0059)
Top Ring Groove Clearance, mm (in) .............. 0.10 (0.004)
Top Ring End Gap, mm (in) .............. 1.00 (0.040)

Cylinder Head and Valves

Cylinder Head Flatness (Max), mm (in) .............. 0.06 (0.002)
Valve Clearance, mm (in) .............. 0.15 (0.006)
Intake Valve Stem Outside Diameter, mm (in) .............. 4.93 (0.194)
Exhaust Valve Stem Outside Diameter, mm (in) .............. 4.92 (0.193)
Valve Stem Bend, mm (in) .............. 0.03 (0.001)
Valve Guide Inside Diameter, mm (in) .............. 5.06 (0.199)
Valve Spring Free Length, mm (in) .............. 27.30 (1.074)
Rocker Arm Shaft Outside Diameter, mm (in) .............. 11.95 (0.470)
Rocker Arm Bearing Inside Diameter, mm (in) .............. 12.07 (0.475)
Push Rod Bend, mm (in) .............. 0.80 (0.031)

Tightening Torque Specs

Cylinder Head, Nm (ft-lbs) .............. 21 (15.5)
Connecting Rod, Nm (ft-lbs) .............. 12 (8.9)
Flywheel, Nm (ft-lbs) .............. 88 (65.1)
Crankcase Cover, Nm (ft-lbs) .............. 21 (15.5)
Intake Manifold, Nm (ft-lbs) .............. 8 (6.1)
Oil Drain Plug, Nm (ft-lbs) .............. 25 (18.6)
Water Pump Cover, Nm (ft-lbs) .............. 7.8 (5.9)
Governor Arm, Nm (ft-lbs) .............. 7.8 (5.9)
Spark Plug, Nm (ft-lbs) .............. 17 (12.6)
Valve Clearance Lock Nut, Nm (ft-lbs) .............. 8.8 (6.5)