Jim go up to front of engine Block .Right in behind the throttle shaft hook to governor box .
Dig around the dirt right behind the rod . they is a ob long flat milled spot there . It will have the I D number for the engine Block .
That will get us real close OR right on the year . Most had same number on Block as tractor itself .The 1540 is for engine R P M setting from factory That's all that is .
Dig around the dirt right behind the rod . they is a ob long flat milled spot there . It will have the I D number for the engine Block .
That will get us real close OR right on the year . Most had same number on Block as tractor itself .The 1540 is for engine R P M setting from factory That's all that is .