Response to Hi I have a Hayward Northstar 2.00HP pump. The fully assembled pump has a model of SP4015X20. The motor on it is bad. I want to replace the motor. The motor has a part number of SP1615Z1MNSR (see screenshot). I can't find that exact part number on your site but the closest is your SPX1615Z1MNS item. That item says it has alternate part numbers of SP1615Z1MNS and SP1615Z1MNSC.... both of which are similar but missing the "R" at the end like my model. What's the difference and will it fit?

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