I recently got a 1992 Seadoo GTS that would not start due to a bad Mpem unit. I replaced that, and I was able to get a spark. Now it's on to the fuel delivery. I wasn't able to suck in any gas so I decided to redo the entire fuel system. I found that the 2 lines inside the gas tank (from fuel baffle?) completely deteriorated and parts everywhere in the gas tank. I got all the parts out of the gas tank, and I found 2 check valves belonging to the deteriorated lines. I couldn't suck/blow through one, and the other one allowed air both ways. Do I need the replace both? Can 1/4 id tygon fuel line be used to replace the lines? Lastly, how long should the main and reserve lines be? Thanks