i have the 20 HP Nortrac tractor it has the Y380 motor in it , i have been useing the NAPA oil filters in it , the 1626 NAPA Gold , i changed the oil , and tryed to put the new filter on , but it will not start on , or go on , i took it back to napa and they gave me a new filter , same thing wont start on , i put the old one on , and it fit right on , i even had a old one laying aroud from the last oil change , it it went right on , any one ever run in to this , right now i just put the old one back on to use the tractor , Thanks Frank from near Erie Pa .