Response to I have a Sta-Rite P4EA6E-186L pump. I replaced the original motor with a Marathon imPower RB003 3-speed motor (we only used 2 of the 3 speeds - fast and slow) whose electronics have gone haywire. Based on the imPower specs this 2-speed motor looks like the perfect replacement. The imPower maximum power is 1.25HP (1HP x 1.25 SF). This motor is also 1.25HP (.75 x 1.67 SF). Will this motor work for me and should I be concerned about the difference in HP vs. SF if the total is the same?

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