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Home / Small Engines / Kawasaki Engines / Kawasaki FH451V

Kawasaki FH451V Maintenance

Engine Model: Kawasaki FH451V

Engine Type: 4-cycle V-Twin cylinder OHV gasoline engine

Total Displacement: 30.1 cu.in (494 cc)

Rated Engine Power: 15 Hp (11.2 kW)

Carburetor Type: Float, fixed main jet

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Service Data

Cylinder Inside Diameter (Max), mm (in) ............... 68.10 (2.681)
Cylinder Compression, kPa (psi) ............... 390 (57)
Cylinder Head Warp, mm (in) ............... 0.05 (0.002)
Intake Valve Clearance, mm (in) ............... 0.10-0.15 (0.004-0.006)
Exhaust Valve Clearance, mm (in) ............... 0.10-0.15 (0.004-0.006)

Engine Oil and Filters

Engine Oil Type ............... SAE 10W-30, 10W-40, 5W-20
API Service Classifications ............... 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 Element Part Number ............... 11013-7002
Air Filter Pre-Cleaner Part Number ............... 11013-7001

Ignition System

Spark Plug Type ............... Champion RCJ8Y
Charging Coil ............... 12V, 13 amps with regulator
Spark Spark Plug Gap, mm (in) ............... 0.75 (0.029)
Spark Plug Torque, Nm ............... 22 (16.2)

Carburetor Adjustments

Model ............... Mikuni B24T1
Throttle Bore Diameter ............... 24 mm
Venturi Diameter ............... 16 mm (0.63 in.)
Main Jet ............... #125
Pilot Jet ............... #48.8
Main Air Jet ............... 1.7 mm
Pilot Air Jet ............... 1.2 mm
Pilot Screw Setting ............... 2-1/4 turn out
High Idle Speed, rpm ............... 3600
Low Idle Speed, rpm ............... 1550

Service Intervals

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

Tightening Torques

Cylinder Head Bolts ............... 25 Nm (19 ft-lb)
Valve Clearance Lock Screws ............... 6.9 Nm (5.1 ft-lb)
Connecting Rod Big End Bolts ............... 5.9 Nm (4.3 ft-lb)
Rocker Arm Bolts ............... 28 Nm (20.5 ft-lb)
Rocker Cover Mounting Bolts ............... 5.9 Nm (4.3 ft-lb)
Exhaust Pipe Flange Nuts ............... 15 Nm (11 ft-lb)
Spark Plugs ............... 22 Nm (16 ft-lb)
Drain Screw (Carburetor) ............... 1.3 Nm (0.95 ft-lb)
Governor Arm Clamp Nut ............... 7.8 Nm (5.7 ft-lb)
Intake Manifold Mounting Bolts ............... 5.9 Nm (4.3 ft-lb)
Cleaner Body Mounting Screws ............... 3.4 Nm (2.5 ft-lb)
Plug Bolt (Engine-Shroud) ............... 5.9 Nm (4.3 ft-lb)
Plug Screw (Engine-Shroud) ............... 3.4 Nm (2.5 ft-lb)

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