{"product_id":"sierra-18-3701-prop-nut-kit-for-mercury-mariner-75hp-outboards-mercruiser-alpha-one-bravo-replaces-11-52707a1","title":"Sierra 18-3701 Prop Nut Kit, Replaces Mercury\/Mercruiser 11-52707A1, 11-52707Q1, Fits 150 HP Outboards","description":"\u003cp\u003eThe Sierra 18-3701 Prop Nut Kit is a replacement propeller nut kit built to secure the propeller assembly on compatible 150 HP outboards. The kit provides the prop nut and tab washer needed to properly torque and lock the propeller in place on the propeller shaft, restoring a secure, vibration-resistant fit after servicing or replacing a propeller. It is manufactured from alloy steel with a machined finish and zinc plating for corrosion resistance in the marine environment.\u003c\/p\u003e\u003cp\u003eThis kit directly replaces Mercury\/Mercruiser part numbers 11-52707A1 and 11-52707Q1, making it a straightforward drop-in replacement when the original prop nut or tab washer is worn, corroded, or lost during a propeller change. Sierra 18-3701 is confirmed for 150 HP applications for the 1990 model year (B, C, D models) and the 1991 model year (all models). Always confirm the part number stamped on your existing hardware or consult your engine's serial number range before ordering to ensure correct fitment.\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 18-3701\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Prop Nut Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined, Zinc Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999256195\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 11-52707A1, 11-52707Q1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e150 HP, 1990 model year, B, C, D models\u003c\/li\u003e\n\u003cli\u003e150 HP, 1991 model year, all models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mercruiser 11-52707A1\u003c\/li\u003e\n\u003cli\u003eMercury\/Mercruiser 11-52707Q1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3701 Prop Nut Kit include?\u003c\/strong\u003e The Sierra 18-3701 kit includes the prop nut and tab washer needed to secure a compatible propeller onto the propeller shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-3701 replace?\u003c\/strong\u003e It replaces Mercury\/Mercruiser part numbers 11-52707A1 and 11-52707Q1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does Sierra 18-3701 fit?\u003c\/strong\u003e It fits 150 HP applications for the 1990 model year (B, C, D models) and the 1991 model year (all models).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3701 prop nut kit made from?\u003c\/strong\u003e The kit is made from alloy steel with a machined finish and zinc plating for corrosion resistance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thread size on the Sierra 18-3701 prop nut?\u003c\/strong\u003e The Sierra 18-3701 prop nut uses a 1\/2 inch thread size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3701 Prop Nut Kit weigh?\u003c\/strong\u003e The kit weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3701 a genuine OEM part or aftermarket?\u003c\/strong\u003e Sierra 18-3701 is an aftermarket replacement kit manufactured to replace Mercury\/Mercruiser OEM parts 11-52707A1 and 11-52707Q1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to replace the tab washer every time I remove the propeller?\u003c\/strong\u003e The Sierra 18-3701 kit includes a tab washer along with the prop nut so both wear items are available together when servicing the propeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many prop nuts and washers come in one 18-3701 kit?\u003c\/strong\u003e One 18-3701 kit contains a single set: one prop nut and one tab washer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill Sierra 18-3701 fit engines outside the listed 1990 and 1991 model years?\u003c\/strong\u003e Fitment for the 18-3701 is confirmed for 150 HP, 1990 (B, C, D models) and 1991 (all models); confirm your engine's model and serial number before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988162130139,"sku":"SIE-18-3701","price":21.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3701_lg__81553.1558125612.500.750.jpg?v=1785188092","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3701-prop-nut-kit-for-mercury-mariner-75hp-outboards-mercruiser-alpha-one-bravo-replaces-11-52707a1","provider":"Good Vibes Marina","version":"1.0","type":"link"}