we ending up doing away with our ventrac dealer that was local and going 70 miles west so we could get the proper work done the moter blew up from overheating and it was the dehatsue 31 hp turbo, replaced with the non turbo fit for the mower. After that we have not had a problem, just make sure you blow the rad. out with air and not water as water will collect more crap than you started with, they also put and overheat switch to cut off pto if it does start to ooverheat but it hasn't been a problem since the swap. It's a very nice piece of equipment but it was a rocky road at the start for sure and I'll say it was more dealer related than ventrac.