I run my ski from cold for approx. 5 minutes normal operation including - wide open 60+ mph., Then warning beep comes on, F1 on display, and runs up to 3000 rpm. If I stop, unplug clip, wait for display, and warning beeper stop, put the clip back in runs at full speed again, then stops a few minutes later. The interval of "normal" operation is anywhere from 30 seconds to 3 minutes., between removing the clip Clean 91 octane fuel being used. My other ski R12X no problems.Just started vacation - bad timing. Please help