I have a Jandy Stealth model # SHPM2.0 pump with serial no. (not too clear) 105FF6065. Is the A.O. Smith 1.5 HP Square Flange 56Y Full Rate EE Motor-B2842 the correct motor for this pump? I currently have what appears to be the B2855 motor (2.0 HP). Am I going to have to run the 1.5 HP pump longer to move the same amount of water that the 2.0 HP pump moves? Also, my pool is salt water, is it ok to use the RO445500 shaft seal?