I don't think anyone said that the service bulletin concerning vapor lock
was 
discussed at Sun n Fun.  I wasn't at the Coupe forum, so I don't really
know 
what was discussed there, just that someone made a comment that John
Wright 
said that Alons are prone to engine failures.  He may not have even been 
talking about vapor lock.  As I said, I wasn't there.  

I replied to this list that there was a service bulletin regarding changes
to 
the fuel system which addresses this issue.  The service bulletin is in
the 
Univair "Alon Service Bulletins Letters and Memoranda" book.  This book
has a 
number on the cover 4-00001B  (may be the part number for the book?).  

The title of this service bulletin is "Carburetor and Fuel System 
Modifications".  It is shown as "Mandatory compliance within the next 50 
hours."  (Remember that service bulletins are not mandatory as far as the
FAA 
is concerned.)  This service bulletin does not have a service bulletin
number 
assigned to it in my book.

The service bulletin requires a change to the carb, fuel tank outlet
fitting, 
firewall penetration, fuel lines, and relocation of the fuel filter.

I am sure that you can still order this book from Univair if you need 
additional info.  Hope this helps.

Good Flying,

Wayne DelRossi
Alon N5618F
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