"Brian Whatcott" wrote in message
...
The Older Gentleman wrote:
Brian Whatcott wrote:

Oh yes, they tend to run them on natural gas. That's quite a favorable
factor, apparently.

I have to ask: why?



I don't have the definitive answer - but here's my guess.
Those pump engines tend to be carbureted, and atomizing the gas at high
throttle would be an issue. Burning dirty is not good for engines.
(One reason why fuel injected engines with ECUs in cars tend to go 100K
easily these days)
Natural gas gets you 100% atomization out of the box.

Brian W

That is most likely the reason. We used to run a standby generator on
propane, and never saw any unburned carbon buildup in the oil. So I would
expect natural gas to be at least as good.

Peter