On Sat, 21 Nov 2015 07:34:16 -0500, Vaughn Simon   
    wrote:   
      
   >On 11/21/2015 1:57 AM, clare@snyder.on.ca wrote:   
   >> I have a 7200/9000 watt Champion generator with a US Carb motor   
   >> snorkel conversion that is not putting out anywhere near full power   
   >> and is tricky to start. I suspect the pikot ajustment? is not correct   
   >> (the spring adjustment screw under the plug above the fuel inlet on   
   >> the Century zero regulator unit.   
   >> Anyone know the best way to determine the proper adjustment? I know   
   >> they are VERY fussy and turning the screw in makes it go lean. (more   
   >> intake vacuum required to open the valve)   
   >   
   >Hopefully someone will come along with more experience than I.  But I   
   >will try to get this conversation started   
   >   
   >You haven't mentioned trying the mixture adjustment, which should be   
   >separate from the adjustment on the zero regulator.   
   >   
   >Very basic, is fuel pressure.  You should find the specification with   
   >the conversion kit.  It is measured in inches of water.   You can buy a   
   >gauge, or make your own manometer from some clear tubing and a yardstick   
   >like I did.  You may find that your fuel pressure under load goes too   
   >low.  That could be anything from a simple fuel regulator adjustment, to   
   >the need for a larger (or more direct) fuel supply line.  There should   
   >be measurement ports for both the inlet and outlet of your zero regulator.   
   >   
   >I have had the same zero regulator since my ancient Onan was factory   
   >new, and don't remember ever adjusting it.  My mixture adjustment   
   >however, is another matter.   
   >   
   >Vaughn   
    The only "mixture adjustment" is the load block. Full range of   
   adjustment there only made things worse, not better, as far as power   
   output. The natural gas pressure is regulated by the utility - New   
   meter and regulator installed this summer - all to spec. Same problem   
   exists on Propane with regulator supplied by US Carburetor - and 2   
   regulators behave exactly the same.   
      
   2 identical generators with the same issue. Run fine on Gasoline. If   
   anything it acts like the generator is running too rich under full   
   load - it loads up and takes time to clear after the load is removed   
   (if I catch it before it dies)   
      
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