Paul,

On a post a week or so ago, someone said that a 13B type engine might have
unusual wear because of the rotors riding on the side seals.  I think that
makes sense.  Would Teflon pads on the lower side of the rotors fix that?
You also said something about oil accumulating in the rotors.  Has anyone
run one of these things for extended periods vertically?

Steve Brazil

Teflon buttons might help.
Nobody to my knowledge has run a Mazda for long in vertical position.

Sachs made a lawn mower with a vertical mounted one rotor
but that was a charged cooled rotor.