Petter PAZ1 question...

by casper Mon Sep 26 2011, 23:24

I've just got a PAZ1, it's about 1960, a compact version with exposed flywheel. Between the pipes for the air inlet and the exhaust pipe, there is a small verticle slot/hole. When I unloaded the engine I tipped it a bit and some oil came out of this slot? It looks like it's meant to be there but seems odd to me that oil would come out. I've not seen another one to compare it to, does this sound normal?
Thanks. Gary