It is quite obvious looking at these pictures which
is the stock seal and which is the after market
seal. The stock seal was 3 mm and the after market
2 mm. I did not have a stock 2 mm seal to take a picture
of yet. The after market seal had about 3 hours running
time.

The after market seal had no crown.

http://www.rotaryeng.net/seals.html

Paul Lamar ...No rotor no motor.

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