I have 1997 GTX and this problem started late last summer. I am able to only run the ski with fuel selector in "Reserve" position. My mechanic after looking at it said the main pick up tube is cracked. He gave it back to me after riding season was over. I got it out few days ago, put new battery in it, filled fuel with non-ethanol fuel. Went to the lake and it ran great for about 30-45 mins. We mainly were just cruising at slow speeds looking at campsites from the water. Got ready to head back and decided to pick it up a notch and ski just died. It was like you pulled the lanyard or hit the kill button. Instant power loss. Tried to crank it but battery wouldn't turn the engine over. Waited 5 mins and it turned over and with throttle held down all the way it cranked. Would run a few yards and died again. Got it cranked again after waiting the played with throttle (wide open then off the wide open) and it lasted maybe 30 seconds before dead again. I was close enough to boat landing to paddle on it. Dropped it off at mechanic who works on jet skis. Of course he is booked for who knows how long. He told me he was unable to find a fuel pick up for that year and model. I looked online last night and found one. I have read solutions to similar problems as mine here on this site and solutions go from electrical, fuel lines, carburators etc. Is there a machine that can diagnose jet ski electronics and such like there is for vehicles and anybody know where I should start my search with what I have posted. Thanks