2 * 2.1 SD

[Dieselman]

I did note it is 180 degrees round the pulley, but it's on the inside, so not visible when assembled.

I wondered if the arrow indicated the point the oil pump sprocket should be aligned to, but decided not to as: A; the sprocket abuts a fully circular crank journal and B; the sprocket keyway was originally offset, as I have now set it again.

As the arrow is not pointing inwards, I wonder if it is simply a direction arrow, or even just a makers mark.