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Author Topic: M91 Vertical Hit & Miss Signed and Numbered 3  (Read 1159 times)

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Re: M91 Vertical Hit & Miss Signed and Numbered 3
« on: September 07, 2019, 05:05:46 pm »
Raphael, my single O ring was located in the top most groove of the piston and like you, I had zero compression.  I switched the O ring to the other groove on the piston and problem was solved (I oiled it a bit and reassembled).  I have more O rings on order, but for now, it is running well with this simple change.

Roger
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