Need some help and ideas troubleshooting this problem. I have a 2014 brutus hd pto. I'm having an intermittent issue where driving normally it will suddenly lose engine rpms down to a bare idle. The machine will slow down, sometimes to a stop, then the rpms will come back up and it will drive normal again. The dealer changed out the fuel filter but that didn't fix it. Today the problem reappeared and this time the engine actually stalled completely. It would restart but not easily. The rpms were erratic and when I tried to go it was sluggish and stalled again. So I loaded it on the trailer and brought it back to the dealer about an hours drive away. When I dropped it off it was running fine again. Interestingly too is that if I used the hand throttle I could run the engine and rpms at full throttle with no issues. But when I used the treddle peddle to drive forward is when it would have the problems. Any thoughts on what may be causing it or things to check would be appreciated. Thanks, Jeremy.