912iS Gearbox Part Numbers

New to the 912iS and doing some research. I take it from your comment that gearboxes have their own serial number. I have my engine serial number but not the gearbox s/n. Is the gearbox s/n listed on one's documentation somewhere or do I need to inspect the gearbox to find it? Might Rotax have the gearbox s/n available somewhere if I have the engine s/n?

Inquiringly,
Randy

You can inspect the gearbox to see its part number and its serial number. If it's a newer engine ( last ten or twelve years - so certainly any iS qualifies) then the original factory gearbox serial can be looked up based on the engine serial number, along with the original part serials of various other major components. If you post me your engine serial number I can have a look. The factory only has records of your "original factory-installed" part serials - if it was changed out sometime along the way, the factory has no way of knowing what's in there now. (Mind you, if such work was done, then it should be documented in the engine log book...)

The engine was purchased in 2017 so that should qualify as a newer engine. The s/n is 7703433-H62243. It is still new-in-box. Appreciate the help!

7703433 was produced 02-Nov-2015

Engine Type 
912 iS2 Sport

Its original factory gearbox was serial number 66224 
Its original factory gearset was serial number 15.1722

PS: I see that your engine has never been registered! I suggest you visit this page for a walkthrough of the online registration process: https://www.rotax-owner.com/en/rotax-blog/item/50-online-ac-engine-reg