pump hums

[poolhelp101]

i have a heater and i noticed a leak from the screw that is underneath the pipe that goes to the heater. this screw is what i have to unscrew when i close for the winter. i did tighten it when i opened it but there is a drip. i put a small pail underneath it last night and this evening the pail is full. when i emptied the pail i also noticed the water was warm to touch. i do not have the heater going yet so i couldn't figure why the water was so warm. then i noticed the pump motor was hot to touch...i have never noticed the motor being hot before, but i never really have ever touched it...is that normal? i shut the pump off and i could hear a hissing. i put my finger underneath this screw and the hissing stopped. can you give me advise about the leak and if that is normal about the pump motor. thanks

[Poconos]

That drain plug is easy. Take it out and wrap about 10 turns of teflon pipe tape on the threads and screw it back in. Tighten until the leaking stops and be careful not to overtighten. As for the motor, they do run hot especially if in direct sun. Think I remember 140F or so on mine with an IR thermometer and that's inside a poolhouse. Could the water just feel warm because the air was cool? Only way a pump could heat water significantly is for the flow to be almost blocked and pumping only a trickle then all thre energy from the motor goes into heating water rather than moving it.
Al