I don't know how old the pump is, but the motor was replaced about 15 years ago so I think it logical to replace the whole pump at this time. 1.5HP 230V model SP4010X152NS. In shopping online I see mention of "drop-in replacement" options but have my doubts and expect the replacement will have to be replumbed. I've had little luck getting info from Hayward, only a boilerplate message in response to a detailed form that required model and serial numbers. The company that opens and closes sent a quote for a Pentair unit for an installed price of over $3700 since we told them at closing the pump seemed to be failing. Any insights will be appreciated.