McCulloch PM 105 ........................................

McCulloch PM105

A rather scarce saw the cylinder is of the later type porting and of the Super Pro type
I got this saw from a local recycler before it was turned into aluminum tin cans and is of the new generation of reed valves ( SP105 AND 125 )

Model: Pro Mac 105

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MANUFACTURED BY: McCULLOCH MOTORS CORP.
LOS ANGELES, CALIFORNIA, U.S.A.
SERIES OR ASSEMBLY NUMBER: 600078
YEAR INTRODUCED: 1973
YEAR DISCONTINUED: 1977
ENGINE DISPLACEMENT: 6.5 cu. in. (106.5 cc)
NUMBER OF CYLINDERS: 1
CYLINDER BORE: 2.250 in. (57 mm)
PISTON STROKE: 1.635 in. (41.5 mm)
CYLINDER TYPE: Aluminum with cast iron sleeve
INTAKE METHOD: Reed valves with third port induction system
Note this is wrong there is no third port
MANUFACTURER ADVERTISED H.P.: not advertised
WEIGHT :
OPERATOR CONFIGURATION: One Man operation
HANDLEBAR SYSTEM: Rigid
CHAIN BRAKE: none
CLUTCH: Centrifugal
DRIVE TYPE: Direct
CONSTRUCTION: Die cast magnesium
MAGNETO TYPE: McCulloch flywheel breaker point system
CARBURETOR: Tillotson HL-291BC series
MAJOR REPAIR KIT: RK-100HL
MINOR REPAIR KIT: DG-5HL
AIR FILTER SYSTEM: Flocked wire screen element
STARTER TYPE: McCulloch automatic rewind on left side
OIL PUMP: Automatic with manual override
OPERATING RPM:
IGNITION TIMING: 26 degrees before TDC
BREAKER POINT SETTING: 0.020 in. (0.56 mm)
FLYWHEEL/COIL AIR GAP: 0.010 in. (0.25 mm)
SPARK PLUG TYPE: AC CS42T
SPARK PLUG GAP: 0.025 in. (0.63 mm)
CRANKSHAFT MAIN BEARINGS: Ball
FUEL TANK CAPACITY:
FUEL OIL RATIO: 20:1
RECOMMENDED FUEL OCTANE: Regular, minimum 70 octane
MIX OIL SPECIFICATION: Mcculloch two-cycle chain saw mix oil
CHAIN PITCH: 3/8 in.
CHAIN TYPE: McCulloch
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED: 18 in. (45 cm)
LONGEST GUIDE BAR SUPPLIED: 36 in. (91 cm)
COLOUR SCHEME: McCulloch Yellow enamel with Black top cover