[SEL] Q on engine at Portland

[Dave Rotigel]

At 10:37 PM 8/31/2005, you wrote:
>In this Portland picture:
><http://www.oldengine.org/members/holland/images/Portland2005/P8250021.html>
>(very nice set of pix, by the way!!), there is a small brass petcock valve
>on top of the engine cylinder.  What's this used for?  There isn't a cup, so
>I don't think it's for priming- or is it?
>
>Thanks!
>Rick
>(Rick's Taylor Vacuum Engine: http://www.oldengine.org/members/inzero/ )

Compression release.
         Dave