Was idling when the engine quit and wouldn't start after that. Pulled the cowling off and noticed fuel spraying from somewhere near the base of the schrader valve. How does the primer actually work? and why would fuel be spraying out without pressing on the key? Is there pressure there all the time? Luckily a good samaritan came by and towed us back to the ramp, a two hour tow, luckily we had good weather. I need to get this fixed. Does anyone have any ideas as to what the problem is? I don't have a manual and haven't been able to find an exploded view online.