Just rebuilt a 1954 7.5 hp Evinrude including rings, ignition, impeller. I also converted to long shaft from short shaft which required lengthening the water tube 5 inches. First time to run it, the engine got hot. Immediately shut it down. Removed power head. Placed power drill on shaft to turn pump. Minimal pressure. Removed lower unit. Inspected impeller. Looks good. Placed lower unit in 5 gallon bucket. Drill on shaft. With priming pump I got good pressure. If pump not primed, wont work. Inspected water tube and is clear. Reassembled, drill on shaft, primed, still cant get water up to power head. Any thoughts
