I have a 89 yamaha 15 hp. I just replaced the ware pump, thermostat, spark plugs and so on. I noticed I have water coming out of the pee hole but no water coming out of the thermostat hole below that. I've looked at some old posts and put the thermostat in boiling water and it opened. I removed the thermostat housing and blew air and water in the passage to see if I could blow some junk out. Water came out the prop but not the second hole. I shot water in the hole from the outside and it came out the prop but not up at the housing. It seems like I'm still getting water through the head just not out of that high exhaust port. Do I need to worry ?