took the boat out Saturday morning-21 RDC Coastal with 2007 300XS- Fired right up and I idled around for a couple of minutes. Engine Temp was 122 Degrees and I headed down a canal for about 2 minutes when it lost power. I was only doing about 4200-4500 rpms. Number 6 blew and there is a hole in the side of my block. I have extended warranty thru SSI-Service Guard Systems thu 04/25/2012. Does anyone have any history with them? Once we get the new powerhead installed, we may be selling this motor and going to a 250 Pro XS. Let me know if anyone is interested.

http://www.serviceguardsystems.com/about/