{"product_id":"1547-5523a66-mercruiser-1970-1977-upper-unit-gear-case-1-65r-165-hp-5523a18","title":"1547-5523A66 Mercruiser 1970-1977 Upper Unit Gear Case 1.65R 165 HP 5523A18","description":"\u003cp\u003e\u003cstrong\u003eMercruiser Upper Unit Gear Case 1.65R for 1970-1977 Models (165 HP)\u003c\/strong\u003e — Direct replacement for original equipment on classic Mercruiser inboards rated at 165 HP.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eGear ratio: 1.65R (reverse reduction)\u003c\/li\u003e\n\u003cli\u003eOEM part number: 5523A18\u003c\/li\u003e\n\u003cli\u003eFits 1970–1977 Mercruiser inboard engines\u003c\/li\u003e\n\u003cli\u003eComplete upper unit assembly ready to install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis original-spec gear case ensures proper propeller speed and thrust characteristics for your vintage Mercruiser — critical for reliable performance and fuel efficiency on the water.\u003c\/p\u003e","brand":"eBay Import","offers":[{"title":"Default Title","offer_id":46018989326438,"sku":null,"price":1019.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/4630\/9734\/files\/s-l100_88ea130f-d8ca-4e50-9360-38cd1fd2e8e0.jpg?v=1784931380","url":"https:\/\/findmypart.shop\/products\/1547-5523a66-mercruiser-1970-1977-upper-unit-gear-case-1-65r-165-hp-5523a18","provider":"Find My Part","version":"1.0","type":"link"}