{"product_id":"johnson-evinrude-timer-base-for-150-155-175-hp-6-cyl-cross-flow-1989-1992-replaces-oem-583853-sierra-18-99410","title":"Sierra 18-99410 Johnson Evinrude Timer Base, 6 Cylinder, Replaces 763774 584363 583853, Fits 1989-1992 150-175 HP","description":"\u003cp\u003eThe Sierra 18-99410 is a replacement timer base for 6 cylinder Johnson\/Evinrude Cross Flow outboard engines equipped with Quick Start and S.L.O.W. Ignition systems. The timer base is a core ignition component that controls spark timing as the engine rotates, and a worn or failing unit can cause hard starting, misfires, or inconsistent timing across cylinders. Installing the Sierra 18-99410 restores the original timing signal path so the ignition system fires each cylinder at the correct point in the engine cycle.\u003c\/p\u003e\u003cp\u003eThis timer base fits 1989-1992 6 cylinder Cross Flow engines rated 150, 155, and 175 HP. It directly replaces OEM numbers 763774, 584363, and 583853, so it installs in place of the original part without modification. The unit weighs 0.9 pounds.\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 18-99410\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinders:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e Cross Flow with Quick Start and S.L.O.W.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 1989-1992, 6 cylinder Cross Flow engines with Quick Start and S.L.O.W., 150, 155, and 175 HP\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e763774\u003c\/li\u003e\n\u003cli\u003e584363\u003c\/li\u003e\n\u003cli\u003e583853\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99410 timer base fit?\u003c\/strong\u003e The Sierra 18-99410 timer base fits 1989-1992 6 cylinder Johnson\/Evinrude Cross Flow engines equipped with Quick Start and S.L.O.W., rated 150, 155, and 175 HP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this timer base replace?\u003c\/strong\u003e This timer base replaces OEM numbers 763774, 584363, and 583853.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99410 weigh?\u003c\/strong\u003e The Sierra 18-99410 timer base weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99410 a direct replacement for the original timer base?\u003c\/strong\u003e Yes, the Sierra 18-99410 is designed as a direct replacement, installing in place of the original 763774, 584363, or 583853 timer base without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this timer base work with a 4 cylinder outboard?\u003c\/strong\u003e No, the Sierra 18-99410 is built for 6 cylinder Johnson\/Evinrude Cross Flow engines, not 4 cylinder applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system must my engine have for this timer base to fit?\u003c\/strong\u003e Your engine needs the Quick Start and S.L.O.W. Ignition system found on the covered 6 cylinder Cross Flow Johnson\/Evinrude engines to use the Sierra 18-99410.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate my timer base needs replacement?\u003c\/strong\u003e Hard starting, misfires, or inconsistent spark timing on a 6 cylinder Johnson\/Evinrude Cross Flow engine are common signs that the timer base, such as the Sierra 18-99410, needs replacing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat horsepower ratings does the 18-99410 cover?\u003c\/strong\u003e The Sierra 18-99410 is built for 150, 155, and 175 HP versions of the 1989-1992 6 cylinder Cross Flow engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC for this part 808282394417?\u003c\/strong\u003e Yes, the Sierra 18-99410 timer base carries UPC 808282394417.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cross-reference this part using my old timer base number?\u003c\/strong\u003e Yes, if your old timer base is stamped 763774, 584363, or 583853, the Sierra 18-99410 is the correct replacement.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443345115,"sku":"SIE-18-99410","price":436.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-133-3853_lg__40142.1722515559.500.750.jpg?v=1785188060","url":"https:\/\/www.goodvibesmarina.com\/products\/johnson-evinrude-timer-base-for-150-155-175-hp-6-cyl-cross-flow-1989-1992-replaces-oem-583853-sierra-18-99410","provider":"Good Vibes Marina","version":"1.0","type":"link"}