MANUFACTURED BY: |  | HOMELITE-TEXTRON |
 | | PORT CHESTER, NEW YORK, USA |
SERIES OR ASSEMBLY NUMBER: | | UT10139, UT10138-A, UT10502 |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | |
YEAR DISCONTINUED: | | 1977 |
ENGINE DISPLACEMENT: | | 6.1 cu. in. (100 cc) |
NUMBER OF CYLINDERS: | | Homelite Two-Cycle single cylinder loop scavenged engine |
CYLINDER BORE: | | 2.1875 in. 55.5 mm) |
PISTON STROKE: | | 1.625 in. (41.3 mm) |
PISTON RING THICKNESS: | | 0.0625 in. 2 rings pn 56291 |
CYLINDER TYPE: | | Aluminum with chrome plated bore |
INTAKE METHOD: | | 4 reed pyramid type |
MANUFACTURER ADVERTISED H.P.: | | not advertised |
WEIGHT: | | 22 lbs. 10 oz. (10.3 kg) powerhead only |
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: | | Flywheel type, Phelon or Wico with breaker points |
CARBURETOR: | | Tillotson HL-222A HL294,
also WALBRO SDC-60, SDC-74 |
MAJOR REPAIR KIT: | | RK-86HL |
MINOR REPAIR KIT: | | DG-5HL |
AIR FILTER SYSTEM: | | Cellulose fiber element |
STARTER TYPE: | | Homelite automatic rewind, 2 pawl type. replacement cord
is 48 in. of #5 |
OIL PUMP: | | Automatic gear driven with manual override |
MAXIMUM ENGINE RPM: | | 6,000 to 6,500, no load 9,000 to 10,500 |
IDLE RPM: | | |
IGNITION TIMING: | | Position stator plate fully clockwise |
BREAKER POINT SETTING: | | 0.015 in. (0.38 mm) |
FLYWHEEL/COIL AIR GAP: | | Position is fixed |
SPARK PLUG TYPE: | | Champion CJ-6 |
SPARK PLUG GAP: | | 0.025 in. (0.63 mm) |
CRANKSHAFT MAIN BEARINGS: | | Ball on flywheel side, caged needle roller on drive side |
FUEL TANK CAPACITY: | | 49.3 oz. (1500 ml) |
FUEL OIL RATIO: | | 32:1 with Homelite oil |
RECOMMENDED FUEL OCTANE: | | Regular grade |
MIX OIL SPECIFICATION: | | Homelite Chain Saw mix oil |
CHAIN PITCH: | | .404 in. |
CHAIN TYPE: | | Homelite |
BAR MOUNT PATTERN: | | 16 link |
SHORTEST GUIDE BAR SUPPLIED: | | 23 in. (58 cm) |
LONGEST GUIDE BAR SUPPLIED: | | 60 in. (152 cm) |
COLOUR SCHEME: | | Homelite Red enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |