{"product_id":"sierra-18-99417-ignition-timer-base-for-johnson-evinrude-4-cyl-cross-flow-outboards-1978-1987-85-140-hp-replaces-oem-583376","title":"Sierra Timer Base 18-99417 for Johnson\/Evinrude 4 Cyl Cross Flow Engines, Replaces 763783","description":"\u003cp\u003eThe Sierra 18-99417 is a timer base for Johnson\/Evinrude 4 cylinder Cross Flow outboard engines equipped with twin power pack ignition systems. The timer base is the component that generates the timing signal the power packs use to fire the ignition at the correct point in the engine cycle, so a worn or failed unit typically shows up as rough running, misfires, hard starting, or a no-spark condition on one or more cylinders. This unit is built to take the place of the original Johnson\/Evinrude timer base and is cross-referenced to the OEM part numbers used across this engine family, giving owners a sourcing option when the original factory part is hard to find.\u003c\/p\u003e\u003cp\u003eIt is designed specifically for 4 cylinder Cross Flow powerheads covering the 85, 88, 90, 100, 110, 115, and 140 HP range that use twin power packs, so it should be matched against the engine's HP and ignition configuration before ordering. The unit weighs 0.9 pounds and ships as a single timer base assembly.\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 18-99417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Evinrude Outboard Ignition System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 8 x 5 x 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394486\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Twin power pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 4 cylinder Cross Flow engines with twin power packs\u003c\/li\u003e\n\u003cli\u003e85, 88, 90, 100, 110, 115, and 140 HP\u003c\/li\u003e\n\u003cli\u003e1978-1987\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e763783\u003c\/li\u003e\n\u003cli\u003e583376\u003c\/li\u003e\n\u003cli\u003e582041\u003c\/li\u003e\n\u003cli\u003e581812\u003c\/li\u003e\n\u003cli\u003e583127\u003c\/li\u003e\n\u003cli\u003e583128\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99417 timer base used for?\u003c\/strong\u003e It supplies the timing signal for the ignition system on Johnson\/Evinrude 4 cylinder Cross Flow outboards that use twin power packs, so it directly affects when each cylinder fires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the 18-99417 timer base fit?\u003c\/strong\u003e It is built for Johnson\/Evinrude 4 cylinder Cross Flow engines with twin power packs in the 85, 88, 90, 100, 110, 115, and 140 HP range, model years 1978-1987.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this timer base replace?\u003c\/strong\u003e The Sierra 18-99417 cross-references to Johnson\/Evinrude OEM numbers 763783, 583376, 582041, 581812, 583127, and 583128.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99417 timer base weigh?\u003c\/strong\u003e This timer base weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the timer base?\u003c\/strong\u003e The Sierra 18-99417 measures approximately 8 x 5 x 3 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this timer base work with single power pack ignition systems?\u003c\/strong\u003e No. The 18-99417 is designed for Johnson\/Evinrude 4 cylinder Cross Flow engines equipped with twin power packs, not single power pack setups.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my timer base needs replacing?\u003c\/strong\u003e Symptoms of a failing timer base on these Johnson\/Evinrude Cross Flow engines include misfiring, rough idle, hard starting, or loss of spark on one or more cylinders.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99417 a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-99417 is a Sierra-branded timer base manufactured as a replacement for Johnson\/Evinrude 4 cylinder Cross Flow ignition systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-99417?\u003c\/strong\u003e The order includes one Sierra 18-99417 timer base unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99417 fit an Evinrude engine outside the 1978-1987 range?\u003c\/strong\u003e The 18-99417 is specified for the 1978-1987 model years on the listed 4 cylinder Cross Flow HP range, so engines outside that range should be checked against their own OEM part number before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988444197083,"sku":"SIE-18-99417","price":309.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-133-3376_lg__91020.1558111288.500.750.jpg?v=1785188954","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99417-ignition-timer-base-for-johnson-evinrude-4-cyl-cross-flow-outboards-1978-1987-85-140-hp-replaces-oem-583376","provider":"Good Vibes Marina","version":"1.0","type":"link"}