Timing System; Fuel Feeding; Lubrication; Cooling - Husqvarna TC 450 Workshop Manual

GENERAL

ENGINE

4-stroke, single cylinder
Bore (310) ....................................................................................... 3.27 in.
Bore (450- 510) ............................................................................... 3.81 in.
Stroke (310) .................................................................................... 2.17 in.
Stroke (450) .................................................................................... 2.39 in.
Stroke (510) .................................................................................... 2.67 in.
Displacement (310) ................................................................. 18.16 cu. in.
Displacement (450) ................................................................. 27.39 cu. in.
Displacement (510) ................................................................. 30.56 cu. in.
Compression ratio ............................................................................ 12.9:1

TIMING SYSTEM

Double overhead camshaft; 4 valves
Valve angle in relation to cylinder:
INLET .................................................................................................... 12°
EXHAUST ............................................................................................. 13°
Valve clearance with cold engine
INLET.................................................................................. 0.004-0.006 in.
EXHAUST........................................................................... 0.006-0.008 in.

FUEL FEEDING

Type (TE-SMR) ......................................... to injection electronic, throttle body MIKUNI D42
Type (TC-TXC 450-510)....... carburetor "Keihin" FCR-MX 41 with acceleration pump and T.P.S. (Throttle Position Sensor)
Dry type air filter

LUBRICATION

Type .................................. Dry sump with two oil pump rotors and cartridge filter

COOLING

By fluid with double cooler (TC, TXC)
By fluid with double cooler and electric fan (TE-SMR)

IGNITION

CDI electronic (TC, TXC) inductive discharge (TE, SMR) with adjustable advance (digital control9
Spark plug type ........................................................................ "NGK" CR8EB
Spark plug gap ......................................................................... 0.7 mm
STARTING (TC) ................................. kick start (with automatic decompressor)
STARTING (TE-TXC) ....... electric and kick start (with automatic decompressor)
STARTING (SMR) ............................... electric (with automatic decompressor) *
*: kick start upon request
Part. N. 8000 H1344 (10-2009) A.3