Bought an '89 CCSN2001 in 2005 with 210 hrs on it, did very little (oil, impeller, fuel filter, etc) After 1st 20 hrs change the oil, then every 30. I also drove the first 10hrs like it was a new motor taking it pretty darn easy and only started hitting it hard after that. GREAT BOAT sold it in 2007 for 1000 more than I paid and put a couple of hundred hours on it....