{"product_id":"sierra-18-99525-lower-unit-adapter-kit-for-marine-lower-unit-pressure-and-vacuum-testers","title":"Sierra 18-99525 Lower Unit Adapter Kit, Cross-Reference 551-33-1, 551-34PV, 551-34HA, 551-34HB","description":"\u003cp\u003eThe Sierra 18-99525 Lower Unit Adapter Kit is a specialty tool kit built for connecting lower unit wiring and sending components on outboard and sterndrive applications where the factory connector needs to be adapted. The kit bundles a set of individual adapter pieces so that installers have the correct connector on hand for the job rather than sourcing each piece separately. It is designed as a direct, drop-in wiring solution for technicians and boat owners performing lower unit service, trim sender replacement, or related wiring repairs. The kit ships complete with the pieces listed below, letting you match the correct adapter to your application without piecing together individual components from multiple sources. Because lower unit wiring adapters vary by connector style and pin configuration, the Sierra 18-99525 is cross-referenced to several equivalent part numbers to help buyers confirm they are ordering the correct kit for their existing wiring harness. As with any lower unit wiring component, check your existing connector style and the manufacturer's recommended part number for your specific application before installing to ensure a proper fit.\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 18-99525\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Adapter Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Specialty Tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.4 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394882\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 551-334M, 551-334S, 551-334V, 551-33TN, 551-33UN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Part Numbers:\u003c\/strong\u003e 551-33-1, 551-34PV, 551-34HA, 551-34HB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e551-33-1\u003c\/li\u003e\n\u003cli\u003e551-34PV\u003c\/li\u003e\n\u003cli\u003e551-34HA\u003c\/li\u003e\n\u003cli\u003e551-34HB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-99525 Lower Unit Adapter Kit?\u003c\/strong\u003e The kit includes five individual adapter pieces: 551-334M, 551-334S, 551-334V, 551-33TN, and 551-33UN, packaged together as the Sierra 18-99525 Adapter Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part numbers is the Sierra 18-99525 compatible with?\u003c\/strong\u003e The Sierra 18-99525 is compatible with part numbers 551-33-1, 551-34PV, 551-34HA, and 551-34HB, so it can be cross-checked against any of those numbers when confirming fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99525 Adapter Kit weigh?\u003c\/strong\u003e The Sierra 18-99525 Lower Unit Adapter Kit weighs 0.4 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99525 is the Sierra manufacturer part number for this Lower Unit Adapter Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99525 used for?\u003c\/strong\u003e It is a lower unit adapter kit used to connect wiring components, such as lower unit or trim sender connections, where an adapter is needed to mate to the existing harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99525 fit my boat's lower unit wiring?\u003c\/strong\u003e Fitment depends on your connector style, so check your existing part number against the compatible numbers 551-33-1, 551-34PV, 551-34HA, and 551-34HB before ordering the Sierra 18-99525.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many adapter pieces come in the kit?\u003c\/strong\u003e The Sierra 18-99525 kit contains five adapter pieces: 551-334M, 551-334S, 551-334V, 551-33TN, and 551-33UN.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of product is the Sierra 18-99525?\u003c\/strong\u003e The Sierra 18-99525 is classified as a specialty tool, specifically a lower unit adapter kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I order individual adapters instead of the full kit?\u003c\/strong\u003e The Sierra 18-99525 is sold as a complete kit containing all five adapter pieces (551-334M, 551-334S, 551-334V, 551-33TN, 551-33UN) rather than as individual components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm I am ordering the correct adapter kit?\u003c\/strong\u003e Compare your existing lower unit wiring connector's part number to the Sierra 18-99525's compatible numbers (551-33-1, 551-34PV, 551-34HA, 551-34HB) to confirm a proper match before installing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446195931,"sku":"SIE-18-99525","price":51.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-551-334K_lg__88720.1558115276.500.750.jpg?v=1785189204","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99525-lower-unit-adapter-kit-for-marine-lower-unit-pressure-and-vacuum-testers","provider":"Good Vibes Marina","version":"1.0","type":"link"}