I'm having troubles with my 2008 Everride Scorpion FX 34" with the 19hp Kawasaki. It seems like the hydro drive has lost a good amount of power, especially on the left side. We changed the oil with the recommended oil and with a filter from Everride, it seemed to help some, but not much. The thing that puzzles me is that the oil gets noticeably dirty in it, but on my other Scorpion I've never changed the oil and it's completely clean. We followed the correct bleeding procedure and tried adjusting them, but nothing seems to help. Any suggestions? Thanks!