Thanks Stew.
I got the engine running last night and made a number of improvements and tuneups today. Once I got it all together, there were several embarrassing problems that I had to correct.
- The connecting rod was too long so the piston was hitting the head before top dead center. Had to mill a depression in the head and face a 1/16" off the top of the piston.
- The connecting rod was hitting the side of the cylinder so I had to turn a bevel on the inside of the cylinder and turn the rod down to a smaller diameter.
- The valve travel was insufficient to open the valve, so I had to do some more machining on the cam. Also had to increase the dwell since the valve wasn't staying open long enough.
Today I corrected all that. I also added the plumbing to bring the air supply line out the side of the base. Now all I have left is to complete the governor and valve latching mechanism so it will run in hit n miss mode.
Got a video loading on youtube at the moment.
I will post the video as soon as it finishes uploading. Here are some pictures.









Chuck