Do you determine engine rotation by facing the from front or stading behind it for purpose of determining firing order?

When determining engine rotation, it is standard practice to stand in front of the engine and observe the direction in which the crankshaft is rotating. This is because the firing order of an engine is based on the sequence in which the cylinders fire, and this sequence is determined by the rotation of the crankshaft.

If you were to stand behind the engine, the firing order would appear reversed. This is because the crankshaft would be rotating in the opposite direction, and the cylinders would be firing in the opposite order.

Therefore, it is important to stand in front of the engine when determining firing order so that you can observe the correct sequence of cylinder firing.