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 adapter 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 adapter 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.
-- Paul Lamar ...No rotor no motor.

I had you on Lots of cars Bob so I don't think you got this
message. I sent this to AOL as well

-- Paul Lamar ...No rotor no motor.

I know its the metering oil pump. I prefer to not premix, but I dont
want to run crankcase oil. Would you please add this topic to the forum
and see if anyone else has run across this.
thanks
Bob Mears

The Topic has been on quite some. Perhaps that is whay you did not see it.
I think I had the wrong email address for you.

I am at Sun n Fun. Richard Sohn may also be here so if I see him I will
ask him to use my computer to respond to your question.

Do you have an original 20B or is it built up from 13B parts? There is
a possibility that Mazda used different metering pumps for different
engines. Also there could be a shaft alignment problem.