Oleo-Mac 251 Chainsaw

OLEO-MAC 251

REGGIO EMILIA, ITALY

SERIES OR ASSEMBLY NUMBER: 12

WEIGHT: 6.5kg with 40cm bar & chain

14.3 lbs. with 16 in bar & chain

MANUFACTURER ADVERTISED H.P. 6

ENGINE DISPLACEMENT: 49cc (3.0 cu. in.)

CYLINDER BORE: 44mm (1.73 in.)

PISTON STROKE: 32mm (1.26 in.)

CYLINDER TYPE: Aluminum with chrome impregnated bore

INTAKE METHOD: Piston ported

CLUTCH: Centrifugal, engages @ 3000 rpm

MAGNETO TYPE: Selettra, flywheel magneto

IGNITION TIMING: 2.2mm (0.86 in.) before TDC

BREAKER POINT SETTING: 0.45mm (0.017 in.)

SPARK PLUG: Bosch WKA 175 T6 or Champion CJ7Y

SPARK PLUG GAP: 0.5mm (0.020 in.)

CARBURETOR: Tillotson HS-128B

REBUILD KIT: RK-23HS

GASKET AND DIAPHRAGM KIT: DG-5HS/T

AIR FILTER SYSTEM: Flocked wire screen

OIL PUMP: Automatic

FUEL TANK CAPACITY: 700ml (24.63 Imp. Oz.)

FUEL OIL RATIO: 20:1

RECOMMENDED FUEL OCTANE: Regular

CHAIN PITCH: 3/8 in.

CHAIN TYPE: Oregon

SHORTEST GUIDE BAR SUPPLIED: 16 in.

LONGEST GUIDE BAR SUPPLIED: 18 in.