[duke36]

I have one on my car; it starts happy at GAV 1/2 turn open and runs well at approx. 1/4 turn open though it leaks a little at shut down. May have to check the float level, etc as I've never had it apart. Perhaps I should run it down at shut off as some suggest. MPG seems to be a little less than the Zeniths I've had but it appears to achieve more power.
If any one has an instruction sheet or section view diagram for the Marvel or Allstate they could post, that would be helpful.