So to this point I addressed all the Gemini shortcomings but one: the waste oil discharge out the bottom of the engine. What a mess! Years ago, long before the manufacturers themselves started doing it, I ported this waste oil discharge straight to the carburetor induction manifold. Yes, in-between the carb and the cylinder head. It shouldn't work but it does - fabulously. Viola - no more waste oil running down the bottom of your aircraft!
On this conversion I made a velocity stack and tapped it for the waste oil. This puts the case oil into the inlet although from past experience I know it would work plumbed directly into the induction manifold. The reason I didn't do that on this engine is because I've found that in between runs the crankcase on this engine drains a LOT of oil. l wouldn't want that collecting in the manifold and causing a potential hydro-lock.
This method of recirculating the oil has the added advantage of allowing one to reduce the amount of oil mixed into the gasoline. I'm shooting for a total oil content of 20 to 1 so I'll now mix my oil at 25 to 1.
