Lister Petter, ST3 overhaul gaket/joint set,part number 657-23557 Supersedes Part Number 657-23555 287370 Hercules water pump 3 and the number 2

3 and the number 2 cylinder assembly only

there is where the differences are

The main chip used has been obsoleted and as of now no replacement has been found

You will use this injector pipe with fuel pump 751-41265 and no others

Lister Petter, ST3 overhaul gaket/joint set,part number 657-23557 Supersedes Part Number 657-23555 287370 Hercules water pump 3 and the number 2657 23557 Lister Petter, overhaul gasket joint set, former part number was 657 23501. This set is for a three cylinder ST3 model engine only. This set gives you the necessary gaskets to seal the complete engine thru the process of a full overhaul. The ST model engine was used on numerous applications including generators, fan units, pumps and air compressors.