There are reports of commercially run E-Tec's doing in the 3-4 thousand sort of hour range. IMO the hours themselves are a lot less important than how they were done and how the engine has been looked after. Like any second hand new tech engine, I would be getting it looked at by a reputable dealer in your area and getting a ECU download to look at usage patterns and historical faults etc prior to committing. Things of note to check on with the earlier E-Tecs as well - engine mounts and bolts - both upper and lower, making sure the vessel has a good filtration system for the fuel, WOT RPM is at or near the models optimum or higher ( computer report will have a graph and numerical values) and that there are no extreme overheats.