ITEM NAME:Voltage Regulator/ 12V 804278A12, 804278T11 for Mercury Outboard Description: Brand 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 75-90 HP 4 Stroke 804278A12 804278T11 Specification: Size(L*W*H): 100mm*80mm*30mm/3.94inch*3.14inch*1.18inch Fitment: for Many Mercury 75-90 HP 4-Stroke Engines Replaces Part Number: 804278A12 / 804278T11 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..Replaces Part Number: 804278A12 / 804278T11.