Hi Daniel, a big CONGRATS on a fine acquisition for your collection.
Perhaps a bit of timing will help. 60 to 80 psi ought to be downright scary on one of these without a work load and without a governor.
I couldn't even get the D-valve to seat, so all the air I was putting in was just blowing out the exhaust!
Most, if not all of the issues with this engine will be revealed in due course .... so stay tuned!
Hi Daniel, It is a bit clutzy but with a Sipp you can often lift it up on edge from the flywheel side with air going in and gravity in combination with air will seat the D Valve. Another solution if the engine is well worn is to pull the outside part of the D-valve rod away from the engine frame. If it is loose enough it can force the D-valve onto the port face.
Gil
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