Boy did I get ripped by Briggs. They selling the same regulator under two different part numbers at two very different prices.
Recently I had to replace a couple 10-16 amp regulators Pn 845907. Now today while helping a member on another forum I found that 593490 was the same regulator except it has a fiberglass heat shield over the AC lines. A price cost difference of 19.80 ea. Otherwords, I should had been paying $24 instead of $43.80. since they are basically the same regulator. A Dirty trick by Briggs but business is business.
Another lesson learned....