... How can I determine what the gasket is made of...
Sid,You could try placing a questionable gasket material into a jar of fuel and see what it does. I did this with Aeropoxy 10 years ago. I still have 2 jars in my hangar that are good show & tell items. One with aeropoxy and 100LL - epoxy is in perfect condition. The other is Aeropoxy with mogas - gas is bright yellow and the epoxy chunk is now in mushy-looking flakes. The second sample deteriorated in about a week! Not totally scientific, but it may give you a pretty good idea of compatibility.Kerwyn
