503 Spec Sheet

Aircraft Engine 503UL-D.C.D.I

DESCRIPTION
2-Cyl. 2-stroke fan cooled engine with piston port inlet, with electronic dual ignition, exhaust system, carburetor, rewind starter.

Rotax 503 UL

`Version`	`Performance kW`	`Performance hp`	`Performance 1/min`	`Torque Nm`	`Torque ft.lbf.`	`Torque 1/min`	`R.P.M 1/min`
`503 UL-1V`	`34.0`	`45.6`	`6500`	`51`	`37.6`	`5900`	`6800`
`503 UL-1V`	`37.0`	`49.6`	`6500`	`55`	`40.6`	`6000`	`6800`

`Bore`	`Bore`	`Stroke`	`Stroke`	`Displacement`	`Displacement`	`Compession Ratio`	`Compession Ratio`
`72.0 mm`	`2,84 in.`	`61 mm`	`2,40 in.`	`496.7 cm³`	`30,31 cu.in.`	`th: 10,8`	`ef: 6,2`

Fuel	Super 2-stroke oil	Mixing ratio
min MON 83 RON 91* min AKI 87* *leaded or unleaded	API-TC Classification	1:50 variable with fresh oil pump

Ignition Unit	Ignition Timing	Spark Plug
DUCATI dual CDI	16° v.OT	Rotax Part # 897050

Generator Performance	R.P.M	Voltage
155 W DC	6000 1/min.	13.5 V

	WEIGHT	Kg	lb
Std.	engine (* also available in free air version	31.4	69.2
Std.	2 carbutetors	1.8	4.0
Std.	exhaust system	5.1	11.2
Opt.	2 air cleaners	0.3	0.7
Opt.	dual air cleaner	0.5	1.1
Opt.	electric starter	3.5	7.7
Opt.	"B" gearbox / i = 2.0 / 2.4 / 2.58	4.5	9.9
Opt.	"C" gearbox / i = 2.62 / 3.0 / 3.47 / 4.0	8.0	17.6
Opt.	"E" gearbox / i = 2.62 / 3.0 / 3.47 / 4.0	11.2	24.7
Opt.	Generator 220 W DC	1.1	2.4
Opt.	Oil tank 2.4 l	1.6	3.5
Opt.	Fresh oil pump	0.3	0.7
Opt.	HAC - Kit	0.2	0.4
Opt.	Intake silencer 1V	0.8	1.8
Opt.	Intake silencer 2V	1.1	2.4
Opt.	After muffler	1.6	3.5

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