{"product_id":"spdtmhc-12v-trim-tilt-starter-solenoid-relays-2-pack-for-mercury-mariner-35-275-hp-direct-fit-oem-cross-reference","title":"Spdtmhc 12V Trim\/Tilt Starter Solenoid Relays (2-Pack) for Mercury\/Mariner 35–275 HP — Direct-Fit, OEM Cross-Reference","description":"\u003cp\u003e\u003cstrong\u003eTwo 12V trim\/tilt starter solenoid relays designed as direct-fit replacements for many Mercury and Mariner outboard engines, sold as a pair for convenient swap-outs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your outboard’s trim or starting circuit is behaving intermittently, worn relay solenoids are a common cause. These two Spdtmhc relays are engineered to match multiple OEM part numbers used across Mercury and Mariner models (35–275 HP ranges, various serials listed), making them a practical spare or replacement for routine maintenance and troubleshooting.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and part numbers will these relays fit?\u003c\/h3\u003e\n\u003cp\u003eThese relays were produced to be compatible with a broad set of Mercury and Mariner outboards, covering small to large horsepower models and several OEM reference numbers. Always cross-check the OEM numbers and terminal types on your existing relay before installing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCovers Mercury\/Mariner 35–275 HP families and specific variants (including Magnum II and XR-4 series).\u003c\/li\u003e\n  \u003cli\u003eFits multiple referenced part numbers such as 89-96158, 89-94318, 89846070 and their 'T' variants.\u003c\/li\u003e\n  \u003cli\u003eIncludes units that use 8-32 and 1\/4-20 terminal configurations where indicated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these relays affect trim and starting performance?\u003c\/h3\u003e\n\u003cp\u003eRelay solenoids act as electrical switches that send battery power to the starter motor and trim pump. Replacing a failing relay restores reliable current flow, which can eliminate unpredictable starting behavior and sluggish trim operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores consistent starter engagement and reduces voltage drop under load.\u003c\/li\u003e\n  \u003cli\u003eHelps the trim pump receive steady power for reliable tilt adjustments.\u003c\/li\u003e\n  \u003cli\u003eSold as a pair for replacing both sides or keeping a spare on board.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat do I need to check before buying and installing?\u003c\/h3\u003e\n\u003cp\u003eConfirming fit and terminal types is essential to avoid installation issues. Inspect the label or the old unit’s terminals, and verify the part numbers listed on your engine or parts manual before purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompare the OEM numbers stamped on your current relay to the compatible list provided.\u003c\/li\u003e\n  \u003cli\u003eVerify terminal thread types (8-32, 1\/4-20) and wire routing to ensure correct connections.\u003c\/li\u003e\n  \u003cli\u003eTurn off battery power and note wiring positions before removing the original relay.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and are there installation tips?\u003c\/h3\u003e\n\u003cp\u003eThe product ships as a set of two relay solenoids and includes compatibility documentation. Follow standard marine electrical safety and torque recommendations during installation, and recheck connections after a short test run.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePackage contains 2 x 12V solenoid relay units ready for replacement use.\u003c\/li\u003e\n  \u003cli\u003eUndergoes factory quality checks; still verify fit before final installation.\u003c\/li\u003e\n  \u003cli\u003eNot affiliated with or produced by the original engine manufacturer; sold as aftermarket replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: boat owners, marine mechanics, and fleet operators who service Mercury or Mariner outboards and need dependable replacement trim\/tilt and starter relays. Choose this twin-pack if you want an economical way to swap failing relays, keep a ready spare on board, or service paired systems for balanced performance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these relays compatible with my Mercury 90 HP engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Possibly — they list compatibility with many 90 HP Mercury\/Mariner models; match your OEM part number or terminal type to be sure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the package include two relays?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the listing supplies two 12V relay solenoids, convenient for replacing both units or keeping a spare.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Spdtmhc","offers":[{"title":"Default Title","offer_id":48084535083166,"sku":"B0FH5FZX7G","price":30.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/spdtmhc-relay-front-view.jpg?v=1785858889","url":"https:\/\/northtrailauto.ca\/products\/spdtmhc-12v-trim-tilt-starter-solenoid-relays-2-pack-for-mercury-mariner-35-275-hp-direct-fit-oem-cross-reference","provider":"North Trail Auto","version":"1.0","type":"link"}