finding the Rotax engine manufacture date and model

3648553 was produced 01-Dec-1986 ! 

Model : ROTAX 447 UL

(no other data is available in the factory database...)

Thanks!!!

Could you also check S.N. 3795214? It should be a 447?

I do not see 3795214 in the factory database. It may predate the electronic records! I can check the ancient paper archives at the North American distributor on Monday...

Can you provide the year of manufacture and configuration for 914  6479044