Re: Water pump design question....
ob<br /> in years past some motors took the cooling water from the prop wash and/or a snout on or near the skeg. as long as the prop turned they would stay cool. as port timing got better and clearences tighter and hose power higher it became nessasary to use a higher pressure. now most all outboards have a pressure relief to compensate for pressure fluctuations as the t-stat opens and closes.<br /> one day I will try to get Ron over at Rons marine to let me take some photos of the last 3cyl 75 jonny rude he and the late Tom Hardin built. home built gear case, hand built prop, home made hot head, single ring TRW pistons. custom homemade sleeves with finger ports. a 3 amplifier 3 point set triggered ign system running 3 coils. home made flywheel homade dry exhaust with movable tuner pipe. it was and is a wild looking beast.the hull was sold after his last wreck, that one almost killed him but he did set an altitude record that day with an estimated 85 ft in the air. he also got to find out how come everytime he got tossed he would end upback in the hull. he had justben clocked at 118 MPH. then got a tad of air and took some flying lessons. laid him out for almost a year and he got some bacterial infection from the water and lost a section of his calf muscle, almost lost a leg. <br /> he does stillhave the motor
<br /> I am trying to talk him into reassembling it one more time as a showpiece.but thats to much for on of them hydros made out of paneling and furring strips with 2 coats of varnish for strength
