DesertRat wrote on 04/26/16 at 11:09:11:NOPE ...
the stock p3tc0ck requires the vacuum connection to draw fuel into the carb bowl.
You bypass this it no worky, or works until the fuel bowl is empty ...
either FIX your vacuum issue or swap for the raptor and plug off the vacuum connection at the carb ...
your ONLY choices ...
stock petcock will operate in Prime position with no vacuum, that's the purpose of the Prime setting, to get fuel to the carb when the engine isn't running
just to clarify