I have been contemplating buying a df175,but a merc mechanic I ran across said they have been having alot of problems with timing chains.He also said the powerhead has to be pulled just to get to chain!What worries me is that this engine has only been on the market for 1 1/2 year's.I have talked with two local suzuki dealers that have said that they have not had any issues with the chains yet,but neither would let me talk with their tech's .I know I do not want to be pulling the powerhead off every year after warranty!