{"product_id":"sierra-18-79814-fuel-filter-tool-for-mercury-verado-optimax-vst-fuel-filters-replaces-91-896661","title":"Sierra 18-79814 Shim Gauge Bar, Replaces 349957, for 40 HP V-8 Outboards with Thru Hub Exhaust","description":"\u003cp\u003eThe Sierra 18-79814 Shim Gauge Bar is a precision service tool used to measure and set shim clearance during outboard maintenance. It is designed for 40 HP, V-8 applications with thru hub exhaust, giving technicians and do-it-yourself boaters an accurate way to check shim gaps without guesswork. Using the correct gauge bar helps ensure proper gearcase and exhaust housing clearances are set to specification, which supports smooth operation and helps prevent premature wear from an improperly shimmed assembly.\u003c\/p\u003e\u003cp\u003eThis tool is manufactured by Sierra, a long-standing supplier of marine engine parts and service tools, and is built as a direct equivalent to the OEM 349957 gauge bar. At 0.22 pounds, it is a lightweight, compact tool intended to be kept in a service kit alongside other shimming and clearance-check tools.\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 18-79814\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Shim Gauge Bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.22 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 40 HP, V-8 with thru hub exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 349957\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e40 HP\u003c\/li\u003e\n\u003cli\u003eV-8 with thru hub exhaust\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e349957\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-79814 shim gauge bar do?\u003c\/strong\u003e It is a service tool used to measure and set shim clearance on 40 HP, V-8 applications with thru hub exhaust, helping ensure the gap is set to the correct specification during reassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-79814 replace?\u003c\/strong\u003e The Sierra 18-79814 shim gauge bar is a direct replacement for OEM part number 349957.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-79814 a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is manufactured by Sierra as a direct-replacement service tool for OEM part 349957, not a repackaged factory part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat applications is the 18-79814 gauge bar designed for?\u003c\/strong\u003e Sierra lists this gauge bar for 40 HP, V-8 applications with thru hub exhaust.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-79814 shim gauge bar weigh?\u003c\/strong\u003e The Sierra 18-79814 shim gauge bar weighs 0.22 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-79814 gauge bar work on engines without thru hub exhaust?\u003c\/strong\u003e Sierra specifies this gauge bar for 40 HP, V-8 applications with thru hub exhaust; no other applications are listed for part number 18-79814.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when you order part 18-79814?\u003c\/strong\u003e Ordering Sierra 18-79814 gets you one shim gauge bar tool; no additional accessories are listed for this part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan OEM part 349957 be cross-referenced directly to the Sierra 18-79814?\u003c\/strong\u003e Yes, Sierra part 18-79814 is listed as the replacement for OEM number 349957.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-79814 shim gauge bar made from?\u003c\/strong\u003e The material is not specified for the Sierra 18-79814 shim gauge bar.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-79814 shim gauge bar used during a service job?\u003c\/strong\u003e The gauge bar is used to check and set shim clearance as part of the assembly process on 40 HP, V-8 units with thru hub exhaust, in place of the original 349957 tool.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988426993883,"sku":"SIE-18-79814","price":10.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-79814__18380.1558186507.500.750.jpg?v=1785188397","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-79814-fuel-filter-tool-for-mercury-verado-optimax-vst-fuel-filters-replaces-91-896661","provider":"Good Vibes Marina","version":"1.0","type":"link"}