While I added a few of the cylinder measurements to that section of my Gas Pump Bible, most of it came from Tim Rohr. I thanked him for the contribution on the first page of that section.

My book says "Dual Piston" not dual action.

Jack Sim


Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at www.gaspumpbible.com
Air Meter ID book also available