I had similar problems last year with my 242. Hiccupping when below 3/4 of a tank, and occasional stalling. The rubber hose between the fuel pick up and the in-tank pump was severely deteriorated because one of the previous owners had replaced it before with the wrong type of fuel line. They used ordinary fuel hose for carbureted applications inside the tank. That's a no-no. Carburetor fuel line is only fuel proof on the inside. The outside deteriorates quickly when submerged in gasoline. Make sure that you get the proper type of fuel line for in-tank use. IPD sells this, plus the replacement rubber O-ring for the fuel tank sender unit/fuel pump assembly. Don't try re-using the old O-ring, it's probably quite deteriorated too.

billy242