The Canadian Challenger 503 Power Pack is centered on the Rotax 503 UL DCDI engine and includes everything you need to create thrust and go.

This engine, purpose-built for aircraft and well-proven via thousands of real world installations, has numerous internal improvements to enhance reliability. The engine comes complete with dual electronic ignition, two spark plugs per cylinder, dual carbs, impulse fuel pump, air filter and a very effective muffler. To attach this engine to the airframe we include the motor mount with Lord mounts to isolate the airframe from vibration as well as a stainless steel exhaust mount.

The 503 is air-cooled via an engine-driven fan and is virtually immune to overheating on even the most trying days in the most trying circumstances.

An integrated generator produces AC current (12V 170W) which is converted by the supplied regulator/rectifier to 12V DC (nominal). Electric start is standard including solenoid and wiring. Also included is a backup manual recoil starter.

The reduction drive is the preferred "tall" 2.6-to-1 unit. This turns a highly efficient 60" two-blade fixed pitch wooden prop. This prop is the simplest, lightest and most economical choice for the 503 and it gets out 100% of the horsepower. With the 503 there is no advantage to turning a 3-blade prop, in fact performance would actually diminish.

This option upgrades the propeller with Uralight epoxy leading edge protection to mitigate the impact of spray, slush and rain. Leading edge protection is strongly recommended for operations on floats.