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Model: 450

MANUFACTURED BY:
HOMELITE-TEXTRON
PORT CHESTER, NEW YORK, USA
SERIES OR ASSEMBLY NUMBER:
UT10425, UT10426
450, 450W, 450HG, 450SL
YEAR INTRODUCED:
1978
YEAR DISCONTINUED:
1981
ENGINE DISPLACEMENT:
4.5 cu. in. (74 ccm)
NUMBER OF CYLINDERS:
Homelite Two-Cycle single cylinder loop scavenged engine
CYLINDER BORE:
1.875 in. (47.6 mm)
PISTON STROKE:
1.625 in. (41.3 mm)
PISTON RING THICKNESS:
2 rings, 0.024 in. pn 12039 thin ring
CYLINDER TYPE:
Aluminum with Chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
not advertised
WEIGHT:
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
none
CLUTCH:
Centrifugal, 6 metal shoes
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast Magnesium
MAGNETO TYPE:
Electronic
CARBURETOR:
Walbro SDC-54A
MAJOR REPAIR KIT:
K10-SDC
MINOR REPAIR KIT:
D10-SDC
AIR FILTER SYSTEM:
Cellulose fiber element
STARTER TYPE:
Homelite automatic rewind, replacement cord is
48 in. of #5 (4.0 mm) 5/32 in.
OIL PUMP:
Automatic with manual override
MAXIMUM ENGINE RPM:
no load 11,000 to 12,500
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
0.015 in. (0.38 mm)
SPARK PLUG TYPE:
Champion DJ6J
SPARK PLUG GAP:
0.025 in. (0.63 mm)
CRANKSHAFT MAIN BEARINGS:
Caged Needle Roller
FUEL TANK CAPACITY:
31 oz. (917 ml)
FUEL OIL RATIO:
32:1 with Homelite oil
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
Homelite chain saw mix oil
CHAIN PITCH:
3/8 in.
CHAIN TYPE:
Homelite
BAR MOUNT PATTERN:
14 link
SHORTEST GUIDE BAR SUPPLIED:
16 in. (40 cm)
LONGEST GUIDE BAR SUPPLIED:
31 in. (78 cm)
COLOUR SCHEME:
Homelite Red enamel
PAINT CODES:
ILLUSTRATED PARTS LIST:
IPL no. 24897
SERVICE MANUAL:

COMMENTS:
Wrap around front handle optional



 

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