I think the question is what years to avoid. The 17 had most problems but many guys that got their updates done had good results. Belt blowing, motor mounts, broken bulkheads etc. All first year model productions seem to have most problems. 08 Doo, 12 Cat, 12 Polaris, 16 Polaris, 17 Doo, 19 PolarisWhat years/model Doo would you look for?