It does not really pump hard. It is more like a distributor.
It is fed by atmospheric pressure and not the engine oil
pressure system. Back to premix to be safe and sure.

Paul Lamar

Paul,
Can we fix the problem or is it back to pre mix for over 8,000 ft.
Having only recently pulled a metering pump apart, I'm still unsure how it
pumps at all - let alone improve it !!
Any suggestions- anyone ?
George ( down under)

George Lendich wrote:

Dave Atkins claims the apex seal oil metering system does not work over
8000 feet. He also claims the engine will run up to three months
in automotive service with no apex seal oil whatsoever. We have some

verification

of that as George Graham flew his airplane from Tennessee to New York
state while forgetting to mix two cycle oil with the fuel.

Paul Lamar

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