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Model: 7-21

MANUFACTURED BY:
HOMELITE-TEXTRON
PORT CHESTER, NEW YORK, USA
SERIES OR ASSEMBLY NUMBER:
17 series
YEAR INTRODUCED:
April 1958
YEAR DISCONTINUED:
1958
ENGINE DISPLACEMENT:
5.01 cu. in. (82cc)m
NUMBER OF CYLINDERS:
Homelite Two-Cycle single cylinder loop scavenged engine
CYLINDER BORE:
2.0625 in. (52mm)
PISTON STROKE:
1.50 in. (38.1mm)
PISTON RING THICKNESS:
0.0625 in. pn 55537
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Reed valves (4)
MANUFACTURER ADVERTISED H.P.:
6.6
WEIGHT:
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Gear reduction 2:1 standard, 3.57:1 optional
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Phelon
CARBURETOR:
Tillotson HL-117C
Brown 5-CS
MAJOR REPAIR KIT:
RK-88HL for HL-117C
MINOR REPAIR KIT:
DG-5HL for HL-117C
AIR FILTER SYSTEM:
Skinner ribbon element
STARTER TYPE:
Homelite ball drive automatic rewind
OIL PUMP:
Manual
MAXIMUM ENGINE RPM:
6,000 withair vane governor
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
0.015 in. (0.38mm)
FLYWHEEL/COIL AIR GAP:
fixed position
SPARK PLUG TYPE:
Champion HO-8A (can sub J6)
SPARK PLUG GAP:
0.025 in. (0.63mm)
CRANKSHAFT MAIN BEARINGS:
Ball and caged roller types
FUEL TANK CAPACITY:
64 oz. (1.89 litres)
FUEL OIL RATIO:
10:1
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
SAE 30 or Homelite chain saw mix oil
CHAIN PITCH:
1/2 in.
CHAIN TYPE:
Oregon 10C or 10L
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
14 in. (35cm)
LONGEST GUIDE BAR SUPPLIED:
38 in. (96cm)
COLOUR SCHEME:
Homelite Red with Opalescent Green pulley cover, exhaust cap, cylinder shield, and air shroud. Cooling air intake screen painted silver.
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:
replaced by 7-21C



 

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