Flywheel has two marks 180? apart, think the reason is some power unit applications need to have timing hole in opposite side of flywheel housing.
Remove #1 sparkplug, hold finger OVER hole, have a helper slowly crank the engine 'til you feel compression pressure against your finger, then watch carefully for mark to come into view, that will be the correct mark, mark it with a dab of paint.
Remove #1 sparkplug, hold finger OVER hole, have a helper slowly crank the engine 'til you feel compression pressure against your finger, then watch carefully for mark to come into view, that will be the correct mark, mark it with a dab of paint.