Mercury Electronic Parts Catalog Find the right parts for your Mercury® or MerCruiser® engine here. Search by serial number to see detailed engine diagrams and part numbers, then contact us to place your order or use our online ordering. You can browse by model, but we strongly recommend using your serial number to ensure you find the correct parts. For Mercury Outboards, the serial number label is located on the transom bracket. For MerCruiser Sterndrives, the serial number label is either on the side of the engine or on the top of the flame arrestor cover. Launch the parts catalog here