>
> 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.
> -- > Paul Lamar ...No rotor no motor.
I am not going to make it to SF.
Bob, if you take the adapter out and run the OMP without it, and the noise
is gone, I will send you another adapter. However, I do not have an
explanation how the adapter could cause it.
If the noise is in the OMP, the only thing I could think of is clogged
outputs, and the pump has to work against a lot of back pressure.
Richard Sohn
N2071U
Richard do you still have them for sale? I have a 20B and expect that I
may premix,
but I like to keep all options open.
Bill Jepson
Yes Bill, I do.
Just tell me what OMP you are using.
Richard Sohn
N2071U
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