I was running my 20B and noticed a high pitch whine. My first thought
was an alternator bearing. Course its a bit hard to all with all the
exhaust noise....anyway, upon closer inspection it is the metering oil
pump making the noise. I'm running the adaptor from Richard Shon (I
think thats the right spelling) for an outside oil source. It seems to
be working fine, but the noise bothers me. Anyone else run across this?

Bob Mears
Supermarine Spitfire


Narrow the problem down Bob. Remove the adpater and let the metering pump
suck oil from the crankcase. See if it is the metering pump
making the noise. Most people do away with them and mix
2 cycle oil with the fuel. Keeps the engine cleaner.