I have a 2006 RTX 4 Tech 155 Wake Edition that I recently purchased. The ski has been sitting up for several years, so I cleaned the fuel tank out and replaced the fuel pump and filters. No issues with starting and running for the first 5 minutes. After 5 minutes of running flawlessly the ski starts to sputter and won't take any throttle. Idles fine and I am able to continue back to the ramp. I let it sit for a few minutes and ran again for several minutes with no issues??? Does not run hot, and no alarms or codes showing up. Any help would be appreciated!