I have been looking to buy a 2000 Caravelle Interceptor 232 locally. I took it for a test run on Saturday but before I could, I noticed a hose was loose that connects the lower unit to the motor. I'm guessing and it was suggested that this hose is for water circulation. While I replaced the hose clamp, I noticed a small hole about the size of a quarter in the lower unit itself just above the hose fitting. If this hose is for the water circulation, it didn't seem to effect the temp sensor. So is this hole bad?