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: | | |