These pumps were used on 4, 5, and 6″ dredges. The intake is 4″, outlet is 3″.  The impeller threads onto a 1″ horizontal shaft, and work best with 8 and 9 HP engines. Capable of pumping up to 400 gallons a minute. New pump seal, new gasket and has compressor mounting plate for a T-80 or KAC air compressor. Shipping is an additional charge and should run about $25 to the lower 48. Alaska, you’re in your own world, but you already know that. Ask for shipping cost. Feel free to ask questions.