Hello, i have a 98 gtx limited. I got this ski with a locked up motor. i put a new top end in and took it to the lake. It runs fine fo about 20 mins. and than everything shuts down. It will start up and run fine for another 20 mins and than do the same thing. i changed all the grounds, power cables, dess post, new key, it is charging, new batt, changed all the fuses front and rear, cleaned all the terminals, unpluged sensors etc. i am ready to sink it and go back to my boat. I even tried a ice pack on the mpem to see if it was getting hot. Please help.