I have had my XP in the shop a couple of times. The first issue was it kept lurching forward and back. So the shop put a new rev limiter in. All seemed fine on the next trip to the lake and then it would lose half of its power, barely stay running and when I would get it back to the dock, one plug would be wet with fuel and dead. Put a new plug in and it would run great for about the first 15 min on the lake and then back to barely getting back to the dock... any ideas?