I have been looking around at boats around 150-200 hours but found a supra with around 350 hours and wondering if that is half way past its life?

No, not even close.

That's only two seasons of riding time. Not even close to being high.

If well maintained, that is nothing. However, I have seen boats with 80 hours that I wouldn't touch. <BR> <BR>My buddy has close to 400 on his and is meticulous about taking care of the boat. It looks and runs like brand new.

350 ain't squat. I ran my last boat to 900, no probs. A buddy has almost 600 on his '05 Sanger. It's all in how you take care of them.

1 hour on a boat is about 60 miles on a car. So, your 350 hour boat has about 21,000 miles on it. That's nothing unless it wasn't taken care of or actually abused. My boat's approaching 2000 hours.

thanks guys

not even broke in yet!!

Still has the hone marks on the cylinders I bet.Not even broke in.

I've got close to 1300 on mine and have only gone through a fuel pump and a thermostat. 350 is just getting warmed up.

That is nothing if the person did the required maintencance. I would say the same thing for a boat with 75 or 1000. <BR> <BR>To put it into perspective, my wife's family are Watermen and have many boats, mostly 50+ ft boats with Diesels, but their smaller "skiffs" are 22-25 ft boats with mercuiser's in them from the early 80's. They have been running every day for the past 25 years. When I ask them what they think the hour counts are, they say its gotta be over 10,000 'cause they like to swap out the big engies 50,000k hrs. Her Grandfather's personal clamming rig has the same Detroits from the early 70's and he still runs the, wide open. <BR> <BR>They are totally baffled when I tell them that my customers have a good year if they get over 100 hrs

No