Regarding the cooing sytem; When I'm running the ski on the lake the **** hole seems to be "pissing" just fine. The coolant water is circulating fine, I get no overheating. However when I flush the system with the hose, water only comes out the back of the craft, and NOT the pisser. I've run it this way a few minutes to clean out the waterways, but can never get water to come out the side vent (pisser). I can feel warm air coming out the hole though. Is there any reason this would happen? Is it normal?