Any deviation in the fuel injection can have adverse effects on engine from heavy vibration and shock load to the loss of energy, incomplete combustion and high exhaust temperature. If you turn the engine till the flywheel TDC mark is lined up, and take the little cover off the pump and the marks in the pump are lined, you are on #1. The timing mark lined up with the pointer on the pump. 42 Spencer Diesel offers a complete application guide to find the exact pump, injector, or turbo that fits your agricultural, industrial, or light truck needs. The pointer and timing mark aren't lined up so I need to.
