John Skorczewski wrote: > I sent this question before but believe it bounced. Can you use mo-gas and > 100LL interchangeably in a corsair engine without having to change the > carburetor set-up? Say you have a tank of mo-gas in your plane and go on a > x-country trip. Of coarse when you refuel, it will be with 100LL. Can this > be do this or does the carburetor jets need to be changed depending on the > type of fuel used?<
Not a problem at all. I run 93 octane auto fuel all the time, except when I'm on cross-countrys and have to buy avgas. The only perceptible change is that I can lean the avgas out further at altitude and achieve smooth running at a lower fuel burn rate. And of course, the avgas is less susceptible to vapor locking. My autofuel doesn't have alcohol in it, but since YOU control the mixture, even that shouldn't be a problem at anything over idle speed. I've flown with 10% or so ethanol (but now you're even MORE susceptible to vapor lock) and couldn't tell the difference at idle either, but then I don't spend a lot of time idling my engine. Ethanol has been known to cause other problems with fuel systems such as dissolving rubber parts, but one would hope the carb manufacturers would have that figured out after 30 years of use. I know a guy that has an Ellison carb diaphragm that's been soaking in pure ethanol for something like five years now, with no ill effects, so even that doesn't worry me... Mark Langford, Huntsville, AL mail: N56ML "at" hiwaay.net website: www.N56ML.com
