English French German Italian Portuguese Spanish Swedish


503 Manuals

  • jda8818
  • jda8818's Avatar Topic Author
  • Offline
  • Fresh Boarder
  • Fresh Boarder
6 months 2 days ago #18025 by jda8818
503 Manuals was created by jda8818
Hello to everyone ...

I'm working with a SCDI 503 purchased in 2000 serial number 5171940. The airplane (Kitfox Lite) and the engine have been sitting unused in a hangar for the last fifteen years and I am thinking I may have to split the crankcase and take a look at the seals and o-rings. I remember a temperature split the last time I flew the airplane in about 2002 or so.

The top end including the rings and grooves, piston pin needle bearings and the connecting rod big-end bearings all look OK with no evidence of moisture or rust. Where do I find information about the torque values, crankcase sealer, etc? Also, is it possible to replace the o-rings on the two center ball bearings without breaking the crank down?

Seems like there should be a repair or overhaul manual someplace but i can't seem to find one. The maintenance manual is pretty superficial and lacks the kind of information I might need. I would be surprised if all the seals and o-rings were still resilient and round in cross section after all these years, so I'm getting myself prepared if I need to go in there re-seal it all up.

Thanks in advance for any comments or information ...


Please Log in or Create an account to join the conversation.

6 months 2 days ago - 6 months 2 days ago #18028 by nickjaxe
Replied by nickjaxe on topic 503 Manuals
Thing that helped me no end with that kind of stuff was the CPS DVD...The Rotax 447-503 Complete Rebuilding DVD.

With IMHO the best being the one done by Mike Stratmam.


Last edit: 6 months 2 days ago by nickjaxe.

Please Log in or Create an account to join the conversation.