Make certain that you do not turn the connecting rod around backwards

The side that goes towards the front has a small chamfer or taper on the very edge that goes towards the crankshaft counter weight.

The back side will have little funny swirl marks on the face that go every which way.

It is troublesome on an Enya four stroke about the cam gears. If you swap them from side to side you will reverse the rotation of the engine even though the marks are aligned. Read your instructions carefully