Thank you.. I'll try the coolant change 1st. Do you have a recommendation on the brand/ type of water pump lubricant to add ?

I just picked up a used 21 800xc with 100 miles / 16 hrs  in excellent condition.  I just did a full service and found coolant leaking from the seal in the exact same spot as this post. I don't have a dealer anywhere close and it's not under warranty.   This machine has only Been ridden a few minutes a time in open fields.  Looking to see if I should replace this seal and the coolant, or just try the coolant with a stop leak, or try and leave it be and see if the seal might get any better ?   
Thanks for any advice.