William wrote:
Rather than glue the boot back on the AFM I'm inclined to tape it up
securely with electrical tape to allow easier access in the future should I
want to clean in there again. Any comments or suggestions anyone?

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I use shock cord (bungee cord, elastic cord) to secure the lid on my AFM.  I
welded and riveted tabs to the AFM housing to attach the shockcord around.
In my case I need to open up the AFM flapper completely when I run on
propane - so that there is no restriction.
If I were just running gasoline I would just silicone the lid shut. You
should not need frequent access to the AFM.

See a picture of my AFM at

http://www.telusplanet.net/public/gary2a/rack/propane/propane.htm

Gary Lee