<VV> Fuel Pump Return Needle?

[BobHelt at aol.com]

In a message dated 6/2/2010 8:42:45 A.M. US Mountain Standard Time,  
patiomatt at aol.com writes:

Put it  in.. it stops the fuel from being drawn out when not in use... bad  
mileage..and possibly an over rich idle..




Matt is correct, but here is a bit more explanation. The needle is there to 
 allow a pump discharge when needed, but to prevent what is called 
"pull-over"  when the air flowing thru the carb causes a slight vacuum at the top of 
the  needle, which would draw fuel from the pump chamber if not blocked by 
the  needle.
Regards,
Bob Helt