The new fuel pump was not the problem. Lessions learned: I should have taken the old pump, stuck a piece of fuel line to it and placed the line in a container of fuel, manually actuated the rocker arm and saw if it pumped fuel...the old pump did exactly that. THEN, I should have cranked the engine with no fuel pump on and observed if the plunger that comes out of the engine actually was moving. The new pump is on and on the assumption that it is (also) a working pump, I'm thinking the plunger is not going in-and-out to operate the pump. So, what kind of a repair would this en tale? A partial engine take down, I assume? What internal mechanism causes that plunger to operate? The only other thing I can think of (before putting the tractor away for a year and tear into the engine later) might be replacing the fuel linr from the tank to the inlet of the pump. I assume since this is a pulling pump (as opposed to an electric pushing pump inside the fuel tank), any air leak in the fuel line might be preventing the pump from picking up prime?