Stunner, Check out this link before you go any further. PiperChuck just put this link up in another thread & it just might be the solution you're looking for.


http://www.macspro.com/tuning.asp

Check out their pumpless smoke system for $29.99. It looks like it works fine on small 2-cycle engines as well as 4-strokes. They even have a short video of it on an Avistar with an OS 70 Surpass engine. Anyhow there are a lot less parts involved so finding room in smaller fuses isn't so difficult & it needs no pump. It all works on back pressure, & apparently works pretty good too. Take a look & judge for yourself. I'm definitely going to give it a try on my next plane If I can.