I have a pump model P2RA5D-120L. I purchased and installed a 3/4hp up-rated motor. The pump will run for a while, then turn off for a while and will continue that cycle.

I recently purchased and installed a new impeller and diffuser. The part # for the diffuser is C1-200PA and the impeller is part # C105-138PEB. Those parts are used with a 3/4hp full-rated according to the parts information.

So is the 3/4hp up-rated motor insuffcient?