Commercial use Suzuki DF140 had over 6K hours when we re-powered it. 12 passenger skiff. A lot of that time were hard hours.

3500 hours on a pair of 150 Yamaha 4-strokes on a rental boat in the keys. Never ran worth a crap for the week I had it, but they were still on the boat and mostly there. (Bump-n-Jump, Port Largo rented the boat with port engine low on oil and broken trim :rolleyes: so probably not the best maintainance schedule, them gotta be one of the best motors, ever.

I have an 04 df 250 Suzuki with 1220 hours on it and it runs like a clock with perfect compression. I wouldn't be suprized to put another 1000 or 2 on it before I consider repowering.

I have found that the biggest killer of any powerplant today is fuel integrity. Buy marine grade fuel with no ethynol and run it lilke you stole it.