340 Oil Priming Question First Start

The notches are an indicator of the location of the oil holes. Know the orientation of the oil holes themselves and you KNOW they are correct. If the oil holes are down and biased towards the springs they are correct. You don’t have to worry if your notch is a real notch or the notch was machine incorrectly or anything else, because you cut out the middleman and know where the oil holes actually are.