Engine has 45 hours on it and has run well for the six months I've owned it. I did run it through a sand bar several months ago, but it didn't give my any problem at the time. I had the muffs on in the driveway today and was trying to tweak the idle and the overheat buzzer went off on me. I then backwashed the engine for 20 minutes, but still no luck. Alarm sounded again after running for 5 minutes or so. I noticed that my pressure gauge on my dash was not reading any pressure, so I pulled the hose off and had no pressure where the hose attatches to the head. I'm afraid I may have some blocked water passages. I could use some expert advise and opinions on what I might be able to check. <br /><br />Thanks...Jerry