Destroyed belt - 2010 210 SANTE

[ES]

After a drive with friends around the lake, a friend was testing the boat and testing acceleration and cornering. After 10 mins we started hearing some strange noises and all of a sudden some white smoke (more like vapor) coming out of the exhaust. Nearly concurrently, an error message appeared on the screen saying the engine had overrated and to stop.
We opened the back hatch and the belt at the back was completely shredded. So I guess the engine was not being cooled any longer.
Fortunately we were 5 mins away from our boathouse and we slowly cruised back.
Our Nautique dealer will replace the belt under warranty (boat is 1 year old, we are the first owners) and they said PCM will pick up the cost - most probably a defective belt. They will still charge us for the call to our dock.
Do you think there is any risk we made permanent damage to the engine?

[gride]

The alignment of the pulleys and tensioner should be checked. Was it eaten to the point of failing or did it just dry rot apart?

[HS]

Regarding damage to the engine, the dealer should know by looking at the exhaust manifolds whther they got too hot. Also, as with the above comment on the alignment and tensioner, have them look at the belt pulleys for any corrosion -- it is possible the belt had become worn and failed. When you were cruisng back did you note what the temp guage read? (even though that sensor might not be reading where the highest temps were occuring).

[ES]

Thanks for the input.
HS: The temp gauge generally sits half way through, around 175. When we got the warning it was about 2/3: about 200. That's when we stopped. Opened the hatch and let the engine vent that way as well.
I am trying to attach a couple of pics of what is left of the belt...does not seem overly dry to me - just looks like it came apart.

[ES]

Ok, figured out what happened. Looks like one of the 3 bolts holding the water pump pulley failed (came off). Pulley starting wobbling and that shred the belt. Marina thinks the bolt was probably not tightened correctly at PCM - they never saw this failure before on a quasi-new boat. Everything covered in warranty: 2 new pulleys and belt. Should be back on the water next week-end!