1220 Rotax 503 Dual Carb Engine 52hp
(1220)
Notice: $750 trade in value for any two stroke aircraft engine until 12/31/09.
DESCRIPTION: Two-cycle, two cylinder engine, oil in fuel lubrication, fan cooled BORE: 72.0mm (2.835 in.) STROKE: 61mm (2.40 in.) DISPLACEMENT: 496.7 c.c. (30.31 cu. in.) COMPRESSION RATIO: Theoretical 10.8 - effective 6.2 POWER OUTPUT:52 hp) configuration dual carb. MAX. RECOMMENDED RPM: 6800 rpm DIRECTION OF ROTATION: Counter-clockwise, viewed towards PTO (without reduction gear box) CYLINDER: 2 light alloy cylinders with cast iron sleeves PISTON: Aluminum cast piston with 2 rings PISTON / CYLINDER CLEARANCE: 0.07 - 0.08mm (.0028 - .0032 in.) IGNITION SYSTEM: Breakerless Ducati capacitor discharge dual ignition with magneto generator. GENERATOR OUTPUT: 170 W AC at 6000 rpm and 13.5 V RMS RECTIFIER REGULATOR:(optional) a.) #9103 requires min. load 12 W (1 amp) to regulateb.) #9251 requires no min. load IGNITION TIMING: 1.47mm = .059 in. (16 degrees B.T.D.C.) SPARK PLUG: 14 mm NGK B8ES ELECTRODE GAP: 0.5 mm (.02 in.) CARBURETOR: 1 x BING 36mm (1.42 in.) hand lever choke2 x BING 36mm (1.42 in.) hand lever choke FUEL PUMP: pneumatic fuel pump #6903 for single carb pneumatic fuel pump #6907 for dual carb FUEL: Regular or premium gasoline, octane not lower than 90 octane (unleaded fuels) LUBRICATION OF ENGINE: Super 2- stroke oil (AV-2), proposed ASTM/CEC MIXING RATIO: 50 TO 1 (2%) STARTER: Rewind starter - standarda.) electric starter, magneto side without rewind starter (optional) REDUCTION GEAR BOX "B":(optional) Reduction gear box with torsional shock absorber, for propeller interia up to 3000 kg cm sq. RATIOS: 2.00 to1, 2.238 to 1, 2.58 to 1 REDUCTION GEAR BOX "C":(optional) Reduction gear box with torsional shock absorber, for propeller interia up to 6000 kg cm sq.RATIOS: 2.62 to 1, 3.00 to 1, 3.47 to 1, 4.00 to 1. LUBRICATION OF GEAR BOX: Gear oil, GL5 or GL6, SAE 140EP, or 85 W-140 EP DIRECTION OF PROP SHAFT ROTATION: Clockwise, viewed towards propeller flange. COOLING: Air cooled by axial fan WEIGHTS: Engine without: carburetor, air filter, fuel pump, exhaust system.......................67.0 lbs.......(30.4 kg )2 carbs w/ sockets....................4.0 lbs........(1.8 kg )exhaust system assy..............10.8 lbs........(4.9 kg )2 air filter...................................0.6 lbs........(0.3 kg )electirc start kit, mag end.1.......7.7 lbs........(3.5 kg )Reduction box "B".....................9.9 lbs........(4.5 kg )Reduction box "C"...................16.3 lbs........(8.1 kg )
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