[cricketo]

Another way to deduce the motor type is from the motor controller make/model.

 

[cricketo]

Looks like a series wound - four large cables

BUT the other end - the drive end - may not be usable

It looks like a golf-cart style transaxle. Motor could be series indeed. Looks similar to this :

Club Car 36 Volt Electric Motor Part Number 1012191 for sale online | eBay

Find many great new & used options and get the best deals for Club Car 36 Volt Electric Motor Part Number 1012191 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[cricketo]

If the motor is 36V, you should be able to use it with a 48V controller without issues. Still, visual similarity can be deceiving, so find out from the seller what exactly you're getting before paying for it