new voltage regulator direct replacement Direct replacement to your stock unit. Plug-and-play, direct fit, easy installation Higher grade of electric components All products shipped are tested Fitment: for Mercury Mariner Outboard 5 Wire 815279-3 883072T Specification: Size(L x W x H): 83 x 60 x 25mm/3.3 x 2.4 x 1 inch Number of wires: 5 Replace part numbers: MERCURY MARINE: 815279-3, 815279-5, 815279T, 830179-2, 830179T, 854515, 856748, 883072, 883072T,8M0006034,856748,883072,883072T,1784M,18-5743 Package Includes: 1 Piece Voltage Regulator Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Instruction is not included.