Any risks to upgrading motor size?

[syph424]

I've got an inground pool that's somewhere around 16,500 gallons and currently running with a Hayward Super II, 3/4 HP pump. I'm pretty sure the motor's dead and I was looking to replace it myself. I've been told I need to move up to at least a 1 HP motor... But then the stories start changing - one guy tells me I can drop it in, same impeller and everything will be fine.. another tells me I'd need a new impeller and I'd do better just replacing the entire pump.

Can anyone set me straight?

If I try to drop a 1 HP motor in place of a 3/4 HP motor, do I need to change/upgrade/swap anything else in the process?

Thanks!

 

[duraleigh]

I can't help you with how to change out the motor but I can tell you for sure the 3/4 hp is plenty of pump for that size pool.

 

[patf11]

Replacment part list for pump can be found here:http://www.haywardnet.com/pdfs/replace_pdfs/114Hay2009.pdf

Scroll to bottom of page and you will find impellers are matched to motor HP.

Pump performance data is here http://www.haywardnet.com/inground/products/displayProd.cfm?ProductID=11

As duraleigh stated 3/4 hp should be sufficient but you can calculate desired pump size from the performance data and desired run time.

 

[syph424]

Thanks for the helpful info guys!

I may have dodged the bullet for now - looks like the motor wasn't wired in as well as it should have been, one of the wires had worked it way off the lead. Everything's up and running for the moment... Keep your fingers crossed for me!