Let me start by saying that this motor has been the best I have ever owned over the last 6 years, never had a problem until now. It started the first time I had her out in 3 months. I used stabil over the winter. She idles fine, like a kitten. However, once you get in the throttle and get up on pad, the rpm's will not hold and eventually the engine will kill. My first step was to replace the plugs, but this did nothing to fix it. I can put her in neutral and bring it up to 3500 rpm's, it will hold for a second and then begin to fluctuate up and down. Any ideas?