I did not open and read all the links but first off the "runs forever without overhaul" deal is on old wives tale that began as a pipe dream, wet dream or sales pitch, do not buy into it. Also any alternative waste fuels such as used motor oil will lower the engine life considerably. Any of the 1800 RPM or lower Listers will run a long time between rebuilds if taken care of. Do not confuse a genuine Lister with ANY of the many India copies going by numerous names. No India engine, irregardless of the sales pitch is a long life engine unless it it taken apart completely, cleaned and built back up correctly. When off grid types were trying to use them I had a brisk buisiness fixing all the problems with them. The 1800 RPM air cooled engines are very noisy, the water cooled slow speed engines putt along without much noise. Read up in the Listeroid section here and there is page after page of problems. I used to have pics and write ups but my photo host went belly up and all that was lost.
