Saw this mentioned, and had to try it out. Another person had run the valve through the bottom of the bucket, but I'm too cheap to splurge on a bucket.
Mounted the valve on a plywood sheet, then used 2x4s to shim it up. A few hoses and the on/off valve. Perhaps $15 in parts.
Block the wash tube on top. The 3/4" intake line can go farther down, to the bottom of the bucket. No need for reinforced hose, clear would work, as there is no real vacuum.
This thing worked like shiny things to a golddigger. I pulled the prime by sucking the water up by mouth and jamming the the hose on the transmission inlet. The valve ticked open every five seconds or so, and could easily keep up with almost any engine on this board.
I shut the water off after it warmed up, and filled with two gallons of antifreeze. The leftovers went in the head, and I had my bucket back. The wood wants to float, so I dropped a spare lead weight on the plywood while it was in use.
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