4425638 was produced 02-Jul-1999
Model: ROTAX 912 ULS
Thank you very much for your prompt reply.
However the engine I have is an 80HP engine (black heads) so the model I believe is the UL (and not the ULS).
I ask the date of manufacture because I need to know when should the overhaul by age be made.
I will be very grateful If you can clarify,