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Show 450 to shear off, so it wouldn't tear up the motor. This Evinrude motor was equipped with a water pump to keep it cool, plunger pump; it wouldn't work because the sand in the river would get around this pump and clog it up. " Q. What kind of cooling system did you have on the big boat? " A. We finally discovered a way to submerge some pipes on the outside of the boat so the water from the river would keep these pipes cool, circulate the water on the inside of the pipes through the motor, cool the motor, and back through these pipes again; we found that the most successful way of cooling. " Q. Did you use the river water for that purpose? " A. We used the river water; dip it up and let it settle, then put it in the motor, so the sand wouldn't cut the pump out; used the name water over and over again. " First tried pumping it out of the river, but it wasn't satisfactory because of the mud and stuff in the river, the sand. " Q. After the big boat was launched, who had charge of the operation of the boat? " A. My brother, Clarence Baldwin, operated the big boat the first trip. I had made a few trips down the river before that, so they let me go ahead with this small Evinrude boat, to help locate the deepest water. That is the way be got by without |