finding the Rotax engine manufacture date and model

Geoffrey Storey wrote:

Hi I am changing engine on my ch701 zenith from Rotax 912 80 ul to an other Rotax 912 as my original motor it’s serial number 3782368 , I have the option to buy 2 second hand motors one is Rotax 912 uls serial number 4425899 and the other is Rotax serial number 4404975 I would like to know the year of manufacture of these 2 engines so can determine the TBO of each find the best engine any help would be greatly appreciated 

thanks Geoffrey 

4404975  was produced 02-May-2003

4425899 was produced 27-Oct-1999

Can you please provide history (date of manufacture, etc.) of my Bombardier – Rotax  447  Mot. # M5161650 with "Gearbox: 2.58 5B"?

Thankyou

5161650 was produced 26-Jun-2000 and delivered to the USA distributor on 19-Jul-2000

Engine Type: ROTAX 447 UL

Model Number: 304470010

Hi can I get the details on SN 5644808 please TIA