Several times my piser tube has gotten stopped up and the engine appears to be heating up, missing etc. As it is mounted way out on the stern of my sailboat and hard to get to to service, I cut her off before it gets seriously hot. When I take the cowl off and go to the tube and remove it from the pitot on the head it is wet and after clearing the tube it pumps well and the engine does not run hot or miss anymore. My question: is the piser the only place that water comes out of the engine (can't be) and 2. is it possible that the other water exhaust is clogged or blocked. As I only run the engine at a slow rpm and not a lot, but when I need it I want it there working.<br />Thanks,<br />Ben