I believe the engine this rocker arm setup came from was a 6HP Witte engine. Please measure up your engine and compare to these before purchasing. Part numbers KD243A and KD25A. The overall length of each rocker arm is just under 7 1/4. The rocker arms do move freely on the shaft. The rocker arm rollers do not spin on the pins, they are stuck and do have some flat spots on them. Please see pictures for the absolute best description. I don’t see any cracks or repairs. The flip Oiler is broken.