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Model: 540

MANUFACTURED BY:
HOMELITE-TEXTRON
PORT CHESTER, NEW YORK, USA
SERIES OR ASSEMBLY NUMBER:
UT10550, UT10611, UT10612, UT10684
YEAR INTRODUCED:
1988
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
5.4 cu. in. (88 ccm)
NUMBER OF CYLINDERS:
Homelite Two-Cycle single cylinder loop scavenged engine
CYLINDER BORE:
2.125 in. (54 mm)
PISTON STROKE:
1.530 in. (38.8 mm)
PISTON RING THICKNESS:
2 rings pn 12659A
CYLINDER TYPE:
Aluminum with Chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
WEIGHT:
16 lbs. (7.3 kg) powerhead only
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-Vibration
CHAIN BRAKE:
Mechanical
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Plastic and die cast Magnesium
MAGNETO TYPE:
Electronic
CARBURETOR:
Walbro WJ-2 series
MAJOR REPAIR KIT:
K10-WJ
MINOR REPAIR KIT:
D10-WJ
AIR FILTER SYSTEM:
Nylon mesh cartridge
STARTER TYPE:
Homelite automatic rewind
OIL PUMP:
Automatic, worm gear driven
MAXIMUM ENGINE RPM:
9,000 under load
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
SPARK PLUG TYPE:
Champion CJ6Y
SPARK PLUG GAP:
0.025 in. (0.63 mm)
CRANKSHAFT MAIN BEARINGS:
Ball
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:
72D
BAR MOUNT PATTERN:
14 link
SHORTEST GUIDE BAR SUPPLIED:
20 in. (51 cm)
LONGEST GUIDE BAR SUPPLIED:
43 in. (109 cm)
COLOUR SCHEME:
Homelite Red
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:



 

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