Rotax 185cc ultralight, amateur built and experimental aircraft engine service manual
Removal - Rotax 185 cc Aircraft Engine from airframe
To remove the 185 cc Rotax ultralight engine from the airframe it may be necessary to: If aircraft is equipped with a battery disconnect the battery ground cable before starting any work!
Disconnect:
-Fuel lines at carburetor
-Throttle linkage
-Choke linkage
-Ignition Wiring
-Exhaust system
-Remove props, and store in safe place.
To remove engine
Carefully remove 4 nuts holding recoil to motor mount, pull engine forward and free of mount.
Caution: engines are heavy and awkward to handle, make sure adequate help is available.
Rotax 185 CC Aircraft Engine Disassembly - Magneto removal
Tools required
Bombardier puller part #
() mm socket
10 mm socket
ratchet
Vice
Air or electric impact
Magneto Removal
To remove the magneto first remove the 3 10mm nuts retaining the recoil cup. Remove the cup. Place the engine assembly into a vice, clamping down onto the lower crankcase castings.
With the engine secured, and while locking the crankshaft to prevent it from turning, use an electric or air impact and a () mm socket to remove the flywheel nut, and lock washer.
With the nut and washer removed, install the Rotax puller, make sure that the puller is threaded on as far as possible onto the magneto. Snug up the puller bolt, again secure the crankshaft, and using an air or electric impact and an () mm socket turn the puller bolt clockwise, the magneto should come free.
Once free gently pull out on the magneto, and remove it from the engine.
Inspection:
-Inspect the magneto for signs of wear or damage.
-Inspect the crankshaft key way for signs of damage.
-Inspect the crankshaft threads for signs of damage.