So my fuel shutoff valve leaks, as do most. I have read other posts on the subject and I plan on using a fitting with barbs on one end to attach a fuel line to. I plan on using a typical small engine filter the a small engine shut off valve available at most hardware stores. The Question I have is what size of fitting do I use. I ask this because it is dark outside in my area of the country. In order to remove the stock valve would consist of draining fuel in the dark. Not something I want to do. If anybody knows the size off hand, that would be great.