For the last 2-3 seasons our boat has been in and out of the shop. It started as a backfiring issue. They replaced something (literally everything in the boat except engine has been replaced so i dont remember exactly what) that fixed the backfiring. After that was fixed it started hesitating. This has gone on since middle of last season. It hesitates right when you put the throttle down to pull someone up. Anyway, about a week ago we were skiing and it started hesitating on literally every pass. Then we noticed that we were very low on gas. We put about 12 gallons in the tank and it has not hesitated since. The only thing we can figure is that there might be a hole in the gas line and when the gas gets low, and right before plane when the gas is in the back of the tank, the fuel line is sucking in a little bit of air which isnt giving the engine enough power. Anyway my dad keeps saying he would not have expected for the mechanic to find this (BTW, we have spent a few thousand dollars trying to get this fixed). Am I the only one that thinks considering the guy had it all winter for 2 winters plus about half the ski season, he should have found a hole in the gas line before replacing transmission plates and the ECM?