RE: Venturi for 061 Wasp
That is an interesting point you make there George, I wondered about that too. I think the box the engine came in either said ABN or ABC on the list of features, although this was covered up with a sticker that says "Hypereutectic Alminal". Now this term is a mystery to me as I have not heard of it before and Google was no help.
The engine definitely has a pinch at TDC like an ABC.
I checked the crank fit and it seems to be OK.
The engine will now run at 14,000 all day and remain cool but if I increase the rpm to 16,000, the cylinder head temperature really starts to rise and the rpm starts to sag after 10 seconds or so.
This along with the fact that the max. rpm keeps increasing with subsequent runs tells me the engine is still tight.
Orv.