Has anyone seen a schematic or some other diagram of how the water flows through this engine?<br />My understanding is:<br /><br />Screen<br />Pump<br />Water Tube<br />..<br />Don't Know<br />..<br />In bottom of cylinder jacket<br />Up Jacket<br />Through Thermostat to Head<br />Down Head<br />Exhausted somehow down to port in front of lower unit and possibly exhaust<br /><br />Somewhere in here, the lines through the water control valve circulate through the block, keep pressure on the back of the thermostats/veratherms and send some water out the vent hole.<br /><br />Thats a lot of opportunity for blockage - are there more in the "don't know" part?