One motor has 156 hours, and the other has 352.
These are both 2002 Yamaha Waverunners that have seen light yearly use in Lake Lanier Georgia. No salt water exposure.
Hulls are in good shape; reverse works well on the three seater; fuel lines looked good. Bilges looked like 12 year old bilges, but no oil accumulation. Bit of glazing on the dash gauge, but otherwise good. Fired up and ran just fine. No particular smoke when running (water running through the bypass) either at idle or throttle-up or throttle-down. Seemed sound.
Since the price was right for the pair (well under $6K) they are very tempting. Just a bit concerned about the 352 hours on the three-seater.
Check this out: https://answers.yahoo.com/question/index?qid=20080217062509AAko0kv
Dave M has given you some good advice. In the United States the average seasonal useage for a PWC (Personal Water Craft) is 50 hours, 300 hrs is a 6 year average. Also, determine the actual year on manufacture by looking at the VIN on the right rear of the unit, last two numbers is year. If the units were used in salt water be extremely careful of errosion and rust. ALWAYS have a used unit checked by a qualified tech for that manufacturer.