No, not always. Although many manufacturers state that their spark plugs are perfectly pre-gapped, they might occasionally come slightly wrong. The spacing between the electrodes must be perfect; else, it will not fire properly. As a result, gapping your spark plugs manually when they come may be worthwhile. You may accomplish this with a tool such as a feeler gauge. It may take a bit longer, but it's well worth it to ensure that your engine starts reliably every time.