G.R. Patterson III wrote:

john smith wrote:

Is this the difference beween having a low compression, low horsepower,
no-mixture control engine and having a high compression, high
horsepower, mixture controlled engine?


Sooty plugs indicate either a too-rich mixture or oil burning. I would say it's
the result of having no mixture control in this case.

I think it does run rich on the ground, but in cruise at 2150 rpm, I
only burn 3.5 per hour.