Too cold in the shop for me to stay long but I did get a couple of things done.
I installed the power box and hooked up the electrical connections.
They even worked!
I cut the round ends oversize from a piece of plexiglass then use this turning method.
The plexiglass is pressed between two steel slugs one in the chuck and one in the live center. I leave the protective film on the part until after it is cut to size using a fine feed. The pieces are assembled using 5 min clear epoxy.
One of the problems I found from that run was that the left cylinder was not doing much. The intake valve was doing a fine dance but there wasn't much fuel going into the cylinder. On examination I found that the exhaust valve was barely opening. I didn't do a real good check when I reassembled the front wood base so the valve timing was not good. After 1/2 hour of trying to get all the adjustments for both sides to come out I stopped. The right side was very good but the left just had too much valve clearance so I epoxied this 0.020 shim to the left end of the rocker arm and it worked just fine.
There are a number of other things I want to correct before I start on the cooling system.
The weather has been warming up so I can spend more time in the shop.
I made up some curved exhaust pipes so the exhaust wouldn't blow right down on the wood base.
Did some tuning and corrected some minor issues and made another video.
I was trying to decide if I wanted to finish the cooling system for the engine but after several runs the engine was getting quite hot so I will continue with that.
19th Dec was your 1st post discussing the project... Wow 6 weeks later a running engine, I gotta get myself more organized and to stop procrastinating when I can see what can be achieved in only a few weeks.... my timeline is measured in years !
In both your videos I was trying to see the driven gear edge on, but you swung by pretty quick. But from what I saw it looks like it is running true. Awesome.
And again, you work fast!
Every thing looks great, nice work and thanks for sharing, I am enjoying following along.