If its any help i can tell you what i know.The early di engines before Bombardier took over had some fundimental problems.Bombardier redesigned things since then they have been much more reliable of course some problems just like any other make.One problem was on the fuel line branch which were called in to the main dealers for rectification.If this 175 is one your thinking of buying get its engine no.and contact
www.jetsmarient.com and ask them if this engine has missed any recalls.If its pre Bombardier it would have to be very cheap and i would want to see it checked on a laptop at a main dealers or i would walk.Being DI it may still be a Ficht.You wouldnt be disapointed with the power ,economy I,m sure would be much better than others.Both the 90 and 150 i,ve got are good untill you open them full throttle but then still better than others.Let me know how you get on.Regards Peter