I'm stumped and was hoping to get some ideas. I have a 1998 Glastron
175 with a Volvo Penta Cobra SX 135 hp engine. I've blown the same
hose three times. This is the hose that connects from the thermostat
housing to the circulating pump. They've all split in the same
location...the top half of the hose exiting the thermostat. If you
look on the inside of the hose, you can see a water line about half way
up the diameter of the hose. So obviously the system is not staying
filled with water. I did a raw water test and I'm getting good flow
coming in. I just had the head decked and resealed so I should not be
getting a pressure leak from the cylinders. Something is putting a lot
of pressure (and / or heat) on the hose. I would greatly appreciate
ideas.