{"product_id":"sierra-18-99453-timer-base-for-johnson-evinrude-6-cylinder-outboard-ignition-systems","title":"Sierra Timer Base 18-99453 for Johnson Evinrude 6 Cylinder Outboard Ignition","description":"\u003cp\u003eThe Sierra 18-99453 timer base is a replacement ignition component built for Johnson and Evinrude 6 cylinder outboard engines. The timer base is a core part of the points-style ignition system, working with the flywheel to control ignition timing as the engine runs. Over time the original timer base can wear at the follower or bearing points, causing rough running, misfires, or hard starting, and replacing it restores accurate, consistent timing to the ignition system.\u003c\/p\u003e\u003cp\u003eThis timer base is designed as a direct fit for Johnson and Evinrude 6 cylinder outboard powerheads, making it a straightforward swap for anyone servicing the ignition system on a compatible 6 cylinder OMC outboard. It is sold as a standalone timer base component for technicians and boat owners performing ignition system maintenance or troubleshooting timing-related running issues.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99453\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Johnson Evinrude Timer Base - 6 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Configuration:\u003c\/strong\u003e 6 cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson and Evinrude 6 cylinder outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99453 timer base do?\u003c\/strong\u003e It is the ignition timer base for Johnson and Evinrude 6 cylinder outboard engines, working with the flywheel to control ignition timing as the engine runs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is the 18-99453 timer base designed for?\u003c\/strong\u003e This timer base is designed for Johnson and Evinrude 6 cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99453 timer base weigh?\u003c\/strong\u003e The Sierra 18-99453 timer base weighs 0.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this timer base for a 6 cylinder or 4 cylinder outboard?\u003c\/strong\u003e The 18-99453 is built specifically for 6 cylinder Johnson and Evinrude outboard engines, not 4 cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system category does this part belong to?\u003c\/strong\u003e The Sierra 18-99453 is categorized under the Evinrude outboard ignition system, as it is a core timing component of that system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the timer base on my outboard?\u003c\/strong\u003e A worn timer base can cause inaccurate ignition timing, leading to rough running, misfires, or hard starting, so replacing the 18-99453 timer base restores proper timing control.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99453 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99453 is the Sierra manufacturer part number for this timer base.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand is this timer base made by?\u003c\/strong\u003e This timer base is manufactured by Sierra under part number 18-99453.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99453 timer base come with mounting hardware or other components?\u003c\/strong\u003e The 18-99453 is sold as the timer base component itself for Johnson and Evinrude 6 cylinder outboard ignition systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the 18-99453 timer base myself?\u003c\/strong\u003e The Sierra 18-99453 timer base is a direct-fit replacement for 6 cylinder Johnson and Evinrude outboards, suited to standard ignition system service and repair.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444524763,"sku":"SIE-18-99453","price":299.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-133-3048_lg__03168.1722496771.500.750.jpg?v=1785187997","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99453-timer-base-for-johnson-evinrude-6-cylinder-outboard-ignition-systems","provider":"Good Vibes Marina","version":"1.0","type":"link"}