Carb flange failure

[GDN]

This week-end i started my engine (Rotax 582) and was 3000 rpm full throttle...!
I thank about a frozen carb, low external temperature and one egt off or very low.
I decided to have a look at the engine and one carb was completely disconnected from it the flange was broken between the two clamps.

My instructor said it's an usual failure it's scheduled to replace them every 100 hours.

I also had an oil leakage on the exaust system. Can i start the engine now since i have cleaned it and changed the spark plugs, the older one was brown toffee colored and sticky.

Thanks

A froggy rookie pilots from burgundy, FRANCE