hey there just bought first boat and trying to get it winterized. Hooked up muffs fired motor no pee stream checked tale tail hose all the way to 90deg fitting on block all clear. To scared to let it run to long mabey 20sec still no stream. Is there a thermostate that needs to open i though that no matter what there was water in the tail tale and the thermostate opened to send water back down to lower unit. Is It ok as long as its on muffs to run awhile longer, i did test my overheat horn to make sure it is working in case it gets to hot. Motor was used twice by a previous owner after being purchest from a marina in march 2012. I was able to contact the marina and the mech said motor has new water pump , fuel lines, all new electrical in march just dont know if the owners from march burt up impeller or i just need to get a drum of water to test run.