Well the boat ran fine, then the carb took a dump on me. Rebuilt that. Then went to fire it back up and couldn't get gas to the carb..... checked the pump, it worked but was a holley red and figured it wasn't a good setup with how i had the pump mounted and just wasn't pulling enough to get the gas to flow. Bought a Carter p4070 just now, and still have the same problem!!! I can take the line out and put it directly into the filler cap and it pumps gas how it should. It just wont pump gas with both tanks hooked together or either one alone even.It shouldn't be a cracked tube, it ran fine and unless the trip home from the river was too bumpy and that cracked the tube. Other then that it was fine until the carb took a deuce on me. Boat is for sale, i priced it before it did this so i would really like to fix it so i can get what I'm asking for it. All help if greatly appreciated, Thanks. Blaine

i dont know where though, ive checked and replaced all lines. Maybe vapor lock? If it was vapor lock how do you fix or check for it?

Old school, suck on the fuel line and see if you can feel the gas pull up the line. 

How did you make out?