I was cleaning up the oil injection system on a 1986 yamaha 3 cylinder 2 stroke 70 hp yamaha, 70etlj. When doing so I broke the little plastic link that connects the rod to the oil injection system. It has a stop nut on it, but it was backed off some. I ordered the new part and I need to know where to adjust the oil injection at. I do not want to lean out my motor.