Hi!
I always mount my engines somewhat canted on there side, either 45 degrees or something near that.
No ! There is nothing special you have to think about when mounting your engine canted on its side...this position is often much better to use as the carburettor lines up with the fueltank much more easily than using a vertical position.
Also it much easier to get to the fuelneedle!


Regards!
Jan K
Sweden