Was out today with son and dog (as usual). We were running upriver running a leisurely 50 mph or so when suddenly my classic went to full throttle (WOT). Immediately got my attention, obviously. Out of the corner of my eye, I noticed a Phoenix with a 250 XS passing us. But the speeds quickly equalized, we caught him within a half mile and pulled away. When we got about 1/4 mile ahead, the throttle magically returned to where I had it set previously. However, a couple of minutes later, it slammed to WOT again and sure enough, the phoenix was trying to run by us. No success.Interestingly, two different bass cats passed us with no throttle malfunction of any kind.Anybody ever had this problem?2008 Pantera Classic2014 Mercury Pro XS 200