M3 pitch is about a half semi tone flat

[Baseman norm]

Does anyone know why my M3 is about a half semi tone flat?

I think it's because of the run motor not turning at full speed.

[tpappano]

That's weird, what are you using as a pitch reference?

[Baseman norm]

A chromatic guitar tuner
my M103 is spot on
With every key upper and lower and on the pedals

[Baseman norm]

At first I thought it would be the tone generator caps but then I found out that the caps affected the volume of the tone and how clean it sounds

[tpappano]

Does the organ have a “stock” motor arrangement, like no gears or pulleys between the motor shaft and generator shaft? How about a picture?

[Baseman norm]

It got the flywheel and coupling springs
it appears to be original about 1959/1961
It's the same as my M103 1964

[Baseman norm]

I can get a picture tomorrow when the light is better

[tpappano]

May just be a lubrication issue If it only takes 8 seconds to spin down. It should do much better.

[Baseman norm]

I been soaking the tone generator oil into it then let it run for about four hours
i starts up fine and runs up quickly
Soaked some more been letting sitt for a few days probably let it run some more tomorrow
Was thinking of trying a napatha flush

[Baseman norm]

My M3 is like this one

[tpappano]

If you have just started the “recovery” process it could take a couple weeks for the oil to soak in, if you don't mind waiting. The naphtha flush gets things going *quick*!

[Baseman norm]

Ok thanks
i was reading something somewhere
It should keep turning for about 12 to 15 seconds
Is that correct

[tpappano]

Yes, and will likely do even better with usage and time.