Motor is in a flightcraft phantom ski boat.inboard
dog clutch set up so direct drive to prop.
motor has been in boat from new 1982 model boat look to be a standard car motor with few mods to marinize it.
Its cooled with river water preheated via ext manifolds no thermostat
heated water enters heads at front of motor and exits heads at rear fly wheel end.motor sits on about 19deg angle flywheel being high end. I think water flows this way as to fill motor let air escape as water pumped in (water pump belt driven piped to heat exchanger then to motor then exits motor and is feed in to exhast pipes back to river.Im not sure on whats inside motor and would like to find out how water flows what paths etc. As sender is mounted in manifold above entry point in heads is sender reading temp of pre heated water and other end of motor alot hotter.?From temp gauge motor runs cool 70 deg c .
hope this helps .
Thanks for replys