Mercruiser 350 MPI,2004 overheating

[Heritage27]

I have a 2004, 26' Sea Ray, 350 MPI, Bravo III with 116 hrs on it. It started overheating and I changed the raw water impeller and thermostat and it still overheats once I get over 10 kts. It looks like the red raw water hose is collapsing, I blew back through the outdrive with compressed air and checked the out drive openings to be sure they are clear. Any ideas would be greatly appreciated.

 

[Don S]

Re: Mercruiser 350 MPI,2004 overheating

If that big red hose is collapsing, then things are blocked between the collapsed area and the water. Check the water hose between the drive and transom sheild for kinks, also check the tube that goes thru the transom. They have a sharp bend that can trap stuff. While you may be able to blow air thru it, it really cuts down the water flow.