Feature: 1. Fitment: Our CDI switch box is designed for specific outboard engine models, perfect replacement for 4 hp 2Cyl 40, 4, Gnat 5589202 ‑ 5595531 1976‑1980; Replacement for 7.5 hp 2Cyl 75, 7.5 3801458 ‑ 0A197111 1974‑1985; Replacement for 9.8 hp 2Cyl 110, 9.8 3795659 ‑ 0A197111 1974‑1985; Replacement for 20 hp 2Cyl 20, 200 3537531 ‑ 4709592 1973‑1976. 2. OEM: The OEM of this outboard CDI Unit box are 899883229, 339‑5287, 339‑6222, 339‑6222A1, 339‑6222A4, 339‑6222A6, 339‑6222A8, 339‑6222A10, 18‑5788, 9‑25106, and 114‑6222, please check the part number of your item before purchasing. 3. Excellent Performance: The CDI box can quickly start the engine, transmit information through the sensor, control the ignition system, and improve the response speed and stability of the engine. 4. Durable Serving: The appearance and function of our outboard CDI box completely conforms to OEM standards, and the solid housing and harness protective sleeve can withstand severe conditions, ensuring its long service life. 5. Direct Replacement: Our outboard CDI box is designed for substituting the old and damaged CDI unit of the original vehicle, so that your engine can start working again in a short time. Specification: Item Type: Outboard CDI Power Switch BoxOEM: Replaces Mercury Quicksilver Part: 899883229, 339-5287, 339-6222, 339-6222A1, 339-6222A4, 339-6222A6, 339-6222A8, 339-6222A10 .Replaces Sierra Part: 18-5788 Replaces Mallory Part: 9-25106 Replaces CDI Electronics Part: 114-6222 Fitment:Replacement for 4 hp 2Cyl 40, 4, Gnat 5589202 - 5595531 1976-1980 Replacement for 7.5 hp 2Cyl 75, 7.5 3801458 - 0A197111 1974-1985 Replacement for 9.8 hp 2Cyl 110, 9.8 3795659 - 0A197111 1974-1985 Replacement for 20 hp 2Cyl 20, 200 3537531 - 4709592 1973-1976 Replacement for 20 hp 2Cyl 20, 200 4709593 - 5837436 1977-1980 Package List: 1 x CDI Box