I have a berkley 12jg with divertor,when i hammer it out of the hole tfeels like the it slips..but when im just cruisin its seems fine..Time for a rebuild kit or is there a adjustment i can make..?i'm in a tight spot leaving for havasu in 10 days..

You may be sucking air into the pump through the packing gland or the cleanout hole.  That would be one cause of the pump seeming to slip.   I would check both before tearing into the pump.