Hi John; Yes it is 1650 gas, and I did put a new oil pressure relief value and spring in. That was the first thing after I checked the gauge. And I found that someone had put a small nut under the spring and the value and spring show alot of wear, so I replaced both. I address is 
Ralph Barnett 997 NW 1621st Road Bates City Mo. 64011 And my email is <!-- e --><a href="mailto:rbarnett8080@aol.com">rbarnett8080@aol.com</a><!-- e --> any help will be appreciated. Thanks