Text I have a cletrac with the serial # 1271595, and under it is IXK3, might anyone know what year this is and is it an HG or OC-3?
Thanks, Dan
You have an HG. IXK is the model of the engine. The model HG used the IXK engine untill early in 1950 when they went to the IXB which has a 0.125 larger bore. In 1951 the OC-3 was introduced/
See if you have a serial number tag on either the bellhousing or the right frame rail. Both locations were used. There is also a date the engine was cast located kind of behind the magneto.