PLEASE VERIFY YOUR OEM PART NUMBER FROM YOUR ORIGINAL UNIT TO HELP ENSURE FITMENT. JOHN DEERE -IND EXCAVATORS 25 COMPACT YANMAR 3TN78 DENSO SYSTEM JOHN DEERE -IND EXCAVATORS 30 DENSO SYSTEM YANMAR ENGINES – INDUSTRIAL VARIOUS 91-84 3TN78L DENSO SYSTEM. FITS / Replacement Part Numbers. As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). The sole responsibility of ComponentsPlus – if any – shall be the replacement of defective products as stated above. It is the responsibility of the customer to verify the correct application information prior to purchasing any product from ComponentsPlus.