let me ask as dumber question--is the 'fuel switch' the same thing as the 'petcock' people are talking about in these posts?  if so, i agree it would be a simple change out.  if not, where is it located and how much does it cost?  

would it be better to remove the petcock and hit it with brake cleaner?  or switch it out first?  

lots of questions....   thanks in advance!