{"product_id":"marine-timer-base-for-johnson-evinrude-85-155-hp-4-cylinder-outboards-1973-1977-replaces-oem-581900-sierra-18-99426","title":"Sierra 18-99426 Johnson Evinrude 4 Cylinder Timer Base, Fits 1973-1977 85-140 HP, Replaces 581900","description":"\u003cp\u003eThe Sierra 18-99426 is a timer base built for Johnson\/Evinrude 4 cylinder outboard engines, a core ignition-system component that works with screw terminal power packs to control ignition timing. This timer base is a direct-fit replacement for the original equipment part, restoring correct ignition timing function on applicable Johnson\/Evinrude outboards. It fits 1973-1977 4 cylinder engines rated at 85, 155, 135, and 140 HP that use screw terminal power packs.\u003c\/p\u003e\u003cp\u003eAs an ignition-system replacement part, the timer base is intended for outboard owners and marine technicians replacing a worn, damaged, or failing original timer base. Installing the correct timer base is important to maintaining proper ignition timing and engine performance on these Johnson\/Evinrude 4 cylinder models.\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 18-99426\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Timer Base\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 808282394578\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Count:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e Johnson\/Evinrude 4 cylinder outboards, 85, 155, 135 and 140 HP, with screw terminal power packs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment Years:\u003c\/strong\u003e 1973-1977\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 581900, 581300, 763778, 385433\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 4 cylinder outboards, 1973-1977, 85, 155, 135 and 140 HP, with screw terminal power packs\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e581900\u003c\/li\u003e\n\u003cli\u003e581300\u003c\/li\u003e\n\u003cli\u003e763778\u003c\/li\u003e\n\u003cli\u003e385433\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-99426 timer base fit?\u003c\/strong\u003e The Sierra 18-99426 fits Johnson\/Evinrude 4 cylinder outboard engines from 1973-1977, specifically 85, 155, 135, and 140 HP models that use screw terminal power packs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99426 compatible with 6 cylinder Johnson\/Evinrude engines?\u003c\/strong\u003e No. The Sierra 18-99426 timer base is designed specifically for 4 cylinder Johnson\/Evinrude outboard engines, not 6 cylinder models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this timer base replace?\u003c\/strong\u003e Sierra 18-99426 replaces OEM numbers 581900, 581300, 763778, and 385433 on applicable Johnson\/Evinrude 4 cylinder outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the timer base weigh?\u003c\/strong\u003e The Sierra 18-99426 timer base weighs 0.8 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this timer base work with all Johnson\/Evinrude power pack types?\u003c\/strong\u003e The 18-99426 is built for use with screw terminal power packs on 1973-1977 4 cylinder Johnson\/Evinrude engines; it is not specified for other power pack terminal types.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat horsepower engines use the 18-99426 timer base?\u003c\/strong\u003e This timer base fits 85, 155, 135, and 140 HP Johnson\/Evinrude 4 cylinder outboards from 1973-1977.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99426 a direct OEM replacement?\u003c\/strong\u003e Yes, the 18-99426 is a direct replacement for the original timer base on the listed Johnson\/Evinrude 4 cylinder engines, matching OEM numbers 581900, 581300, 763778, and 385433.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system does this timer base belong to?\u003c\/strong\u003e The Sierra 18-99426 is part of the Evinrude outboard ignition system, functioning as the timer base component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my Johnson\/Evinrude engine needs this timer base?\u003c\/strong\u003e If your Johnson\/Evinrude 4 cylinder outboard is a 1973-1977 model rated at 85, 155, 135, or 140 HP with a screw terminal power pack, the Sierra 18-99426 is the correct timer base part number to check against your engine's original part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand manufactures part number 18-99426?\u003c\/strong\u003e Part number 18-99426 is manufactured by Sierra.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988443771099,"sku":"SIE-18-99426","price":372.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-133-1900_lg__05301.1722505666.500.750.jpg?v=1785188098","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-timer-base-for-johnson-evinrude-85-155-hp-4-cylinder-outboards-1973-1977-replaces-oem-581900-sierra-18-99426","provider":"Good Vibes Marina","version":"1.0","type":"link"}