I attend the hit and miss engine shows, I myself was thinking of a lister diesel, but some say the new india engines should be dismantled and tolerances checked and remove any traces of sand from the casting process. One thing that is important is the govener needs to keep a steady rpm's, if they are as steady as a new gen set ??? Tolerances were not that years ago like today's precision bearings compared to the old babbit poared bearings, but I still love the old put putters, just don't try to run them to todays rpm's or
being only 600 rpm's and todays gen heads take 1850 (I believe) the speed increase of the pulley's would increase the govener varaitions.