1Replacing OEM numbers for reference: 893353A03, fit for Mercruiser DTS. 2Inboard ignition switch, features ACC/OFF/ON/START positions. 3Approximately 2 3/8x5in overall dimension, requires a cutout diameter of 7/8in. 4With one 6spade male connection. Easy to install and use, plug and play. 5Strictly follow the manufacturing standard to make sure excellent performance. Item Type: Ignition Key Switch Kit Material: Plastic Color: Black OEM: 893353A03 Fitment: Fit for Mercruiser DTS Boat part number 1075588 is a new key switch for digital throttle and shift engines, part number 87-893353A03 Positions: 4 (ACC/OFF/ON/START) Cutout Diameter: Approx. 7/8in Overall Dimension: 2 3/8in Dia. x 5in D Connection: (1) 6-spade male connectionMounting: Fixed installation, plug and play 1 x Ignition Switch2 x KeysPlease double check the part number of your item, matching information is for reference only. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks