I have one of these

http://www.osengines.com/history/osm...2-max-40rc.jpg

new in a box and have installed it on my old trainer. When I went to start it to begin the breakin, I found that the airbleed screw is missing. I have looked on the internet to see If I could find one, but have had no luck.

Will any scew work in this as long as it is threaded correctly, or does the tip have to be specially shaped?? I am new to air bleeds.

Is there supposed to be a spring over the screw to hold it in adjustment??

Anything else I should know about this motor??