Pump from lake won't prime

[right cottage]

New 3/4 Pump last year, worked fine last year. Replaced old pump because foot valve fell onto lake bottom, took in sludge. I have a 50' line and about a 10' rise. It has worked for 40 yrs. Primed (about 25 times) as usual but pressure will not rise above 20? Turn off and on and pressure holds at 20. What's wrong???

 

[Reach4]

Your problem is not priming.

Pressure only building to 20 is normally a clogged jet. Use the search box above, and if you cannot find info on running a coat hanger wire or electrical wire thru the right hole, let us know.