See the progress in the "engines from castings thread". Basically only used the block, cam and rod and re-made the rest from stock or castings. I ran it for ~10-15 mins and it did not heat up appreciably so I left the water lines disconnected. Took a bit of messin' with the intake spring tension and governer spring tension to get them dialed in. This one runs on the ignitor and is fueled with natural gas (propane). They could be configured to run on gas or gasoline. The gas cock is from a very old lighting fixture and the accumulator is from part of a steam engine oiler.
[ame]http://www.youtube.com/watch?v=9GWl1sOgZyM[/ame]
[ame]http://www.youtube.com/watch?v=9GWl1sOgZyM[/ame]