ORIGINAL: aussiesteve
I'm running a Saito 82 inverted in my Seagull Spacewalker II. Standard Tank installation and have not had any issues to date with cooling, Lubrication or Carburettor flooding. I have used a different exhaust outlet pipe between the Engine & the muffler though. (I got a longer 90 degree one from an earlier engine). The standard (45degree) pipe didn't allow the muffler to clear the cowl very well).
Irrelevant to the original post but I did change out the standard pushrods as it seemed quite easy for the airflow to overcome the control surfaces (especially when I had the 82 wound right up and on "high" rates)
I,ll 2nd that as long as the tank is mounted at the right level to the spray bar you sould be fine
they whoever they are say you should try to have 2 time the exit vent area as you do intake area for the cooling flow makes sense if you have the room to make it happen
the only other thing i would say and you should do,nn any plane for that matter is turn the engine over by hand to be sure the cyc isn't full of fuel before you hit it with a starter and bend the rod it happen more then you think.