Edson Stationary Gas Engine

[bucketmouth]

We have an Edson engine, there is a threaded half inch hole in the cylinder block directly under the exhaust port on the head. When the piston is in its bottom position the hole is exposed. Would anyone know what goes into that hole? Thanks

[Harry]

It's what comes out of that hole that counts. It's the main exhaust!

This is what's known as a "ported" engine and the exhaust works somewhat like a two-cycle engine. The main exhaust valve is opened by the hit and miss governor to allow the engine to breathe cooling air while it "waits" for the next power stroke.

The Edson is somewhat like the Fuller & Johnson.

http://www.old-engine.com/fuller.htm

[bucketmouth]

We have an Edson Engine that has a half inch threaded hole at the bottom of the cylinder head, when the piston is at the bottom of the stroke the hole is exposed. We have no clue as to what the hole is for, too low for an oiler.

[George & Helen Myers]

Look down further on the page. Harry, I think, responded to your post early today....Helen

Also he has now combined the two inquiries. Now what does an edited message appear?

[Harry]

He sent me an email today asking the same question.