Paul Yaw wrote:

I built an engine from a collection of used parts for the purpose of
testing a different exh. port design.  The exh. port didn't work too
well, so I unhooked the metering pump and drove it daily for three
months with no apex seal oil.  When I disassembled the engine the apex
seals were in pretty bad shape, but the engine did run.  Should you have
a pump failure you will wear the seals, but you will not have a
catastrophic failure.

PY

That is good to know Paul. I have always suspected that was the case.
Very comforting information for an aircraft engine. A broken piston
engine
crankshaft can ruin your whole day on the other hand.

Paul Lamar
 
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