[Digestion] small generators

[Warren Weisman]

Is anyone familiar with an "off the shelf"
spark-ignited four cycle generator that could be
converted to biogas smaller than the Honda EU1000 ?
Possibly something in the 250-500 watt range? 

Not sure the Honda has high enough compression, as
over 8:1 is necessary for biogas---though, maybe Honda
makes some different piston shapes to improve this? I
noticed the Chinese are taking old diesel rigs and
punching spark plug holes in them to run biogas, so a
tiny diesel generator might work, too? 

Thanks, 

Warren Weisman
USA


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