Rocco wrote on 01/07/10 at 08:02:02:....what happens if u 4get to turn the petcock off and it sits over night?
Short answer (assumes OEM petcock):
1. If the petcock is good and the needle valve is good, no problem.
2. If the petcock is good and the needle valve is bad, no problem.
3. If the petcock is bad and the needle valve is good, no problem.
4. If the petcock is bad and the needle valve is bad, problem.
If the petcock is a non-vacuum design (e.g. the Raptor petcock):
1. If the needle valve is good, no problem.
2. If the needle valve is bad, problem.
Clear as mud?