I'm sure this has been asked many times but I'm new to the forum and haven't yet mastered the search function. I have a new 1-1/2 Marathon 1246 driving an older Sta-Rite system (new seal, impeller and diffuser). The motor is thermally protected and hasn't cut off during operation yet but it runs so hot I can't keep my hand on the back portion of it for more than a second. Up closer to the the impeller housing it is not as hot. I just need to know if this is more or less normal. I jury rigged a backflush of the skimmer line and got a good flow of water with no significant debris. I'm waiting for a Drain King to arrive so I can blow out the drain line. Right now I'm running it with both lines open and have a good strong flow into the pool. The heat thing just troubles me.