Depends on the IH tractor, it could be a 414 c. i. in a 986, or the 466 c. i. in the larger 86 series..... Still not good either way. But, no, thats not a Cummins. Saw a pic. of the Allis-Chalmers D-21 named Hoehandle that had the same problem... ... . wild! :-laf