Feature: 1. OE Numbers: Replacing part numbers for reference are 18‑5776, 114 7452A2,114 7452A3, 9‑25101, 339 7452A2, 339 7452A3, 899883230, M899883230 2. Fitment: Fit For Mariner 18 HP 2Cyl 1980‑1985; Fit For Mariner 20 HP 2Cyl 1986‑1987; Fit For Mariner 25 HP 2Cyl 1980‑1987; Fit For Mariner 35 HP 2Cyl 1984‑1989; Fit For Mariner 40 HP 2Cyl 1981‑1984. 3. Multi Function: Outboard CDI box will improve throttle response, increase ignition start speed, increase spark energy, increase rev limit (increase top speed). 4. Sturdy Shell: CDI ignition module is made from resin material with durable shell, effectively helps shield and protect against harsh conditions, vibration, wear and moisture. 5. Simple Operation: CDI ignition box is simple to operate, plug in module, no cutting or splicing, no complicated operations, convenient for using. Specification: Item Type: CDI Box Material: Resin OE: 18-5776, 114 7452A2,114 7452A3, 9-25101, 339 7452A2, 339 7452A3, 899883230, M899883230 Function: Improve throttle response, faster ignition start, increased spark energy, increased rev limit (increased top speed), plug in module (easy to install) Fitment: Fit For Mariner 18 HP 2Cyl 1980 - 1985 Fit For Mariner 20 HP 2Cyl 1986 - 1987 Fit For Mariner 25 HP 2Cyl 1980 - 1987 Fit For Mariner 35 HP 2Cyl 1984 - 1989 Fit For Mariner 40 HP 2Cyl 1981 - 1984. Package List: 1 x CDI Box Note: Please double check the part number of your item, matching information is for reference only.