[Argess]

Thank-you for the reply. I have confirmed the fuel drains back from the carb all the way to the fuel tank due to the siphon effect. Only thing is, it shoudn't if the check valves in the fuel pump are working correctly, or there is some feature of the pump I don't know about.

Wether or not leaking check valves will affect pump delivery volume is yet to be determined. My carbs are currently apart and waiting for gaskets, so I have to put the volume test off till everything is back together. I was going to do the test just by cranking, but all test specs seem to require the engine at idle, which is a bit faster rotation. Additionally, I want to rev the engine a bit and see if the delivery or the pressure drops, and I need the carbs back on for that.

EDIT: I dont' know where that "thumbs down" came from, but I didn't put it there.