{"product_id":"tilt-trim-reservoir-for-mercury-mercruiser-oildyne-power-trim-pumps-replaces-883166a1-883166a2-4-screw-attachment-sierra-18-6778","title":"Sierra Tilt\/Trim Reservoir 18-6778, Replaces 883166A1, 883166A2, for Motors with 4 Screw Attachments","description":"\u003cp\u003eThe Sierra 18-6778 Tilt\/Trim Reservoir is a top mount reservoir designed for Oildyne power trim pumps with plastic reservoirs and tilt\/trim motors that use a 4 screw attachment mounting pattern. It serves as the fluid reservoir for the outboard or sterndrive power trim system, holding the hydraulic fluid that the trim pump circulates to raise and lower the drive unit. The reservoir is constructed of plastic with a machined exterior finish for a consistent fit against the trim motor housing.\u003c\/p\u003e\u003cp\u003eThis reservoir directly replaces 883166A1 and 883166A2, making it a straightforward swap for boat owners dealing with a cracked, leaking, or worn original reservoir. Because it is built to the 4 screw attachment configuration, it is intended for trim motors that use that specific mounting style rather than universal fitment across all trim systems. Sierra manufactures this part to meet or exceed the performance of the original equipment it replaces, and it is backed by Sierra's standard customer satisfaction warranty. Boat owners performing trim system maintenance or troubleshooting fluid loss in the power trim unit can use this reservoir as a direct component-level repair rather than replacing the entire trim motor 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 18-6778\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Tilt\/Trim Reservoir\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type:\u003c\/strong\u003e Top mount reservoir\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Use With:\u003c\/strong\u003e Oildyne power trim pumps with plastic reservoir and tilt\/trim motors with 4 screw attachments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 7 x 6 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.78 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type Compatibility:\u003c\/strong\u003e Diesel, Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282100506\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMotors with 4 screw attachments\u003c\/li\u003e\n\u003cli\u003eOildyne power trim pumps with plastic reservoir\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e883166A1\u003c\/li\u003e\n\u003cli\u003e883166A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-6778 tilt\/trim reservoir fit?\u003c\/strong\u003e The Sierra 18-6778 fits motors with 4 screw attachments and is designed for Oildyne power trim pumps that use a plastic reservoir.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-6778 replace?\u003c\/strong\u003e This reservoir directly replaces OEM part numbers 883166A1 and 883166A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-6778 reservoir a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-6778 is a Sierra-manufactured aftermarket reservoir built to meet or exceed the performance of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-6778 tilt\/trim reservoir made of?\u003c\/strong\u003e It is made of plastic with a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-6778 reservoir?\u003c\/strong\u003e The Sierra 18-6778 measures 7 x 6 x 6 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-6778 tilt\/trim reservoir weigh?\u003c\/strong\u003e The 18-6778 reservoir weighs 0.78 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-6778 come with mounting hardware?\u003c\/strong\u003e The listing for 18-6778 covers the tilt\/trim reservoir itself; check the mounting hardware on your existing trim motor when installing it, since the reservoir is designed for motors with a 4 screw attachment pattern.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-6778 reservoir work with a bottom mount trim system?\u003c\/strong\u003e No, the 18-6778 is a top mount reservoir, so it is intended for trim motors that use a top mount configuration with 4 screw attachments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-6778 reservoir covered by a warranty?\u003c\/strong\u003e Yes, the 18-6778 is covered under Sierra's customer satisfaction warranty as part of the Sierra parts line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fuel types is the 18-6778 reservoir compatible with?\u003c\/strong\u003e The 18-6778 is compatible with boats running either diesel or gasoline power trim systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the tilt\/trim reservoir on my boat?\u003c\/strong\u003e A cracked, leaking, or degraded reservoir like the original 883166A1 or 883166A2 can cause trim fluid loss and inconsistent trim operation, and the Sierra 18-6778 provides a direct replacement for that reservoir.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-6778 include the tilt\/trim motor as well?\u003c\/strong\u003e No, the 18-6778 is the reservoir component only, for motors with 4 screw attachments; it does not include a motor assembly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988359262427,"sku":"SIE-18-6778","price":75.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-6778_lg__29425.1558131331.500.750.jpg?v=1785188406","url":"https:\/\/www.goodvibesmarina.com\/products\/tilt-trim-reservoir-for-mercury-mercruiser-oildyne-power-trim-pumps-replaces-883166a1-883166a2-4-screw-attachment-sierra-18-6778","provider":"Good Vibes Marina","version":"1.0","type":"link"}