{"product_id":"cdi-electronics-118-99311-mercury-mariner-4-cylinder-switch-box-kit-replaces-337-4406","title":"CDI Electronics 118-99311 Mercury Mariner 4 Cylinder Switch Box Kit, Replaces 337-4406","description":"\u003cp\u003eThe CDI Electronics 118-99311 is an ignition switch box kit built for Mercury and Mariner outboard engines. It serves as the electronic control unit that manages spark timing and signal distribution to the powerhead, and is a direct replacement for the original equipment switch box on applicable engines. The kit is supplied complete so the installer does not need to source individual components separately: it includes the switch box assembly, a disk assembly compatible with both 4 and 6 cylinder configurations, a spacer, and bearings needed for a proper fit. This all-in-one packaging is intended to simplify replacement of a failed or aging switch box without requiring a parts hunt across multiple listings.\u003c\/p\u003e\u003cp\u003eThis switch box kit fits most Mercury and Mariner 4 and 6 cylinder outboard engines from 1967 to 1977. Because the kit ships with disks sized for both 4 and 6 cylinder engines, it covers either configuration from a single kit. It is designed as a functional and physical replacement for the original Mercury switch box, cross-referencing to several OEM Mercury part numbers used across that production span. The complete kit weighs 3.9 pounds as packaged.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CDI Electronics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 118-99311\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Switch Box Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury \/ Mariner Outboard Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cylinders:\u003c\/strong\u003e 4 \u0026amp; 6 Cylinder Engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment Years:\u003c\/strong\u003e 1967-1977\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Switch box assembly, disk assembly (4\/6 cylinder), spacer, bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury 337-4406, 337-4411, 393-3736A78\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 736983850553\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMost Mercury \/ Mariner 4 \u0026amp; 6 Cylinder Outboard Engines, 1967-1977\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury 337-4406\u003c\/li\u003e\n\u003cli\u003eMercury 337-4411\u003c\/li\u003e\n\u003cli\u003eMercury 393-3736A78\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the CDI Electronics 118-99311 switch box kit fit?\u003c\/strong\u003e The 118-99311 kit fits most Mercury and Mariner 4 and 6 cylinder outboard engines built from 1967 to 1977.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit work on both 4 cylinder and 6 cylinder Mercury outboards?\u003c\/strong\u003e Yes, the CDI 118-99311 kit ships with disks sized for both 4 and 6 cylinder engines, so a single kit covers either configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM Mercury part numbers does the 118-99311 replace?\u003c\/strong\u003e It replaces Mercury OEM numbers 337-4406, 337-4411, and 393-3736A78.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes included in the switch box kit?\u003c\/strong\u003e The 118-99311 kit includes the switch box assembly, a 4\/6 cylinder disk assembly, a spacer, and bearings needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the CDI 118-99311 switch box kit weigh?\u003c\/strong\u003e The complete kit weighs 3.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the CDI 118-99311 a genuine replacement or an aftermarket equivalent?\u003c\/strong\u003e The 118-99311 is a CDI Electronics switch box kit engineered as a direct functional replacement for the original Mercury switch box on applicable 1967-1977 4 and 6 cylinder outboards, cross-referenced to the OEM Mercury numbers it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any additional parts to install this switch box kit?\u003c\/strong\u003e No additional hardware should be needed since the 118-99311 kit already includes the switch box, disk assembly, spacer, and bearings required for the swap.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this switch box kit fit a Mariner-branded outboard as well as a Mercury?\u003c\/strong\u003e Yes, the 118-99311 is designed for both Mercury and Mariner 4 and 6 cylinder outboard engines within the 1967-1977 fitment range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the CDI 118-99311 switch box kit?\u003c\/strong\u003e The UPC for this kit is 736983850553.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this kit be used on an outboard newer than 1977?\u003c\/strong\u003e The 118-99311 kit's stated fitment covers most Mercury\/Mariner 4 and 6 cylinder engines from 1967 to 1977; fitment outside that range is not specified.\u003c\/p\u003e","brand":"CDI Electronics","offers":[{"title":"Default Title","offer_id":49027442507995,"sku":"SIE-18-99311","price":831.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-114-2986K1_lg__05194.1683636845.500.750.jpg?v=1785163470","url":"https:\/\/www.goodvibesmarina.com\/products\/cdi-electronics-118-99311-mercury-mariner-4-cylinder-switch-box-kit-replaces-337-4406","provider":"Good Vibes Marina","version":"1.0","type":"link"}