Geezeravi8tor
I'm New Here
A prior owner drilled a neat 1" hole in the "filler neck" of the air plenum on my Rotax 912 -- see attached picture. Traces of RTV around the edges suggest someone subsequently tried to seal the hole. I'd like to complete the job of sealing the hole as it seems to me to reduce the flow of cooling air to the engine, which can't be a good thing. But, maybe there's a reason for the hole? Any ideas