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Show Record sand or the effect of sand on the engine. On the 1921 trip I never even took my pump and equipment with me to pump water out 4770 of the river to cool the engine. I put a five gallon can on the back of the boat, dipped the water and poured it into the can, and let it run through the engine. The trouble that Mr. Lint testified to was not on the boat when I was navigating it. As to cooling the motor, keeping it cool, or danger of injuring the engines in operating in sandy water, there is a difference between a Evinrude motor and a larger Marine motor. The first trip down to the San Juan and back we had this trouble with our pumps. Before we got back the pump was worm out, so we took a can that we had been carrying gasoline in and set it up a little higher than the engine. The water from the can would run by gravity 4771 through a little piece of hose, through the engine and out again. That is the way we continued to use it all through the lower Colorado trip. On the large boats, radiators are attached, and on some of them cooling pipes run around the boat and clear water is used entirely. This water has nothing to do but go around the water jacket in your engine. It does not injure your engine, it injures the pump that pumps the water into your engine. On the Green River I had trouble with the effect of sand in the water until I got a second pump. That pump I on the 4772 Marguerite and it would handle the sand. It pumped the sand right on through. We really had no trouble. The water is sandy but it is a very fine sand, and simply wears a regular suction pump out. I never had an experience where the packing in the pump 4773 of the motor wore out by reason of the sediment in the water. The first experience I had was when I went to the mouth of the San Juan and back half way to Halls Crossing before my pump gave out, and I later eliminated that trouble in the manner that I have indicated. I have not operated any boats on these rivers with a radiator. I have seen them. The Moab Garage boats have radiators. They wouldn't have any sand. If they wanted to they could settle the water and put it in the radiator. I would not think there was |