On 2 leases I used Honda engines to power the pumps. On one site I was using a vacuum tank thus no releaser. That tank was rated to hold up to 20" vacuum, I ran with 3 vacuum releasers to hold it to 19". That was on an Alamo 30 with a 6.5 hp Honda. I removed the original gas tank and mounted a 4.5 gal generator tank beside the engine on a wooden stand.
I also had another lease with an Alamo 100, and a releaser. It was also using a Honda 6.5. It had double 1/2" belts on the pulleys, but the best I could get was 17" vacuum because the belts slipped if I tried to run it higher. It used coged belts and I sprayed a belt dressing on to get 17". It also had a 4.5 gal tank for fuel.
Then after I sold that second lease I moved the Alamo 100 to the other site. Still running at 19". I also got a 9 hp Honda. I soon learned the 9 used less gas yielding 19" on 750 taps. When I hooked it up, I thought it would use more gas so I hooked 2 tanks @ 4.5 gal each, side by side. At that site on a 6.5 Honda it ran 17 hrs on 4.5 gal gas, When I hooked the 9 hp to it I started by filling both 4.5 gal tanks, but it ran for just over 3 full days, I then started using just 1 tank, because running 24/7 I had to shut it off daily and change the oil in the engine. I didn't need over 3 days at a stretch. In all cases using the Honda engines I ran the 6.5 's at just over half throttle, on the 9 I ended up running it at about 1/3 throttle.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.