{"product_id":"mcgard-74039-propeller-lock-3-4-16-thread-mercruiser-alpha-i-bravo-i-omc-cobra-mercury-70-hp-johnson-evinrude-150-hp-outboards","title":"McGard 74039 Propeller Lock, 3\/4-16 Thread - MerCruiser Alpha I\/Bravo I, OMC Cobra, Mercury 70 HP+, Johnson\/Evinrude 150 HP+ Outboards","description":"\u003cp\u003eThe McGard 74039 propeller lock protects your outboard or sterndrive propeller against theft by replacing the standard prop nut with a locking nut secured by a unique key. The lock uses McGard's patented free-spinning collar design: if a thief attempts to remove it with pliers, a wrench, or any other gripping tool, the outer collar simply spins in place instead of turning the lock, so the propeller stays secured. The 74039 is built from naval brass and hardened stainless steel for corrosion resistance and long-term durability in a marine environment, and it is sized for a 3\/4-16 thread.\u003c\/p\u003e\u003cp\u003eThis lock is designed for 3\/4-16 thread propeller shafts on a range of sterndrive and outboard engines, including MerCruiser Alpha I and Bravo I (Stainless Steel, incl. X and XR), TRS, and Vazer sterndrives, OMC Cobra and King Cobra sterndrives, Mercury\/Mariner 70 HP and larger outboards, Mercury Bigfoot 40 HP, 50 HP, and 60 HP (4 stroke) outboards, Optimax 75 HP and larger, Verado 135 HP and larger, and Johnson\/Evinrude 150 HP and larger (2 stroke) outboards. Each lock comes with a plastic cap, the propeller lock itself, a matching key, and a washer, giving you everything needed to install it and secure your propeller right out of the box.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e McGard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 74039\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Propeller Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 3\/4-16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Naval brass and hardened stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 6.9 x 5.8 x 1.4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e 1 plastic cap, 1 propeller lock, 1 propeller lock key, 1 washer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 083509740394\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSterndrive Engines: MerCruiser Alpha I, Bravo I Stainless Steel (incl. X and XR), TRS, Vazer\u003c\/li\u003e\n\u003cli\u003eOMC Cobra and King Cobra\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 70 HP and larger (ex. 225 HP 4 stroke before 2005)\u003c\/li\u003e\n\u003cli\u003eMercury Bigfoot 40 HP, 50 HP, 60 HP (4 stroke)\u003c\/li\u003e\n\u003cli\u003eOptimax 75 HP and larger\u003c\/li\u003e\n\u003cli\u003eVerado 135 HP and larger\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 150 HP and larger (2 stroke)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the McGard 74039 propeller lock fit?\u003c\/strong\u003e The 74039 fits 3\/4-16 thread propeller shafts on MerCruiser Alpha I and Bravo I (Stainless Steel, incl. X and XR), TRS, and Vazer sterndrives, OMC Cobra and King Cobra sterndrives, Mercury\/Mariner 70 HP and larger outboards, Mercury Bigfoot 40 HP, 50 HP, and 60 HP (4 stroke) outboards, Optimax 75 HP and larger, Verado 135 HP and larger, and Johnson\/Evinrude 150 HP and larger (2 stroke) outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the McGard propeller lock prevent theft?\u003c\/strong\u003e It replaces the standard prop nut with a locking nut fitted with a free-spinning outer collar. If someone tries to remove it with pliers, a wrench, or any other gripping tool, the collar spins freely instead of turning the lock, so the 74039 stays secured to the shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thread size on the 74039 propeller lock?\u003c\/strong\u003e The McGard 74039 is sized for a 3\/4-16 thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the McGard 74039 made from?\u003c\/strong\u003e It is constructed of naval brass and hardened stainless steel, chosen for corrosion resistance and durability in a marine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the box with the 74039 propeller lock?\u003c\/strong\u003e Each McGard 74039 package includes a plastic cap, the propeller lock, a matching propeller lock key, and a washer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 74039 fit MerCruiser Alpha One and Bravo One outdrives?\u003c\/strong\u003e Yes, the McGard 74039 is designed for MerCruiser Alpha I and Bravo I sterndrives, including the Stainless Steel, X, and XR versions, along with TRS and Vazer sterndrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the McGard 74039 propeller lock?\u003c\/strong\u003e The 74039 is black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the McGard 74039 weigh?\u003c\/strong\u003e The 74039 propeller lock weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 74039 work on a Johnson or Evinrude outboard?\u003c\/strong\u003e It is designed for Johnson\/Evinrude outboards of 150 HP and larger (2 stroke).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 74039 the same lock used on McGard outboard motor and stern drive locks?\u003c\/strong\u003e The 74039 propeller lock uses the same patented free-spinning collar design as McGard's stern drive and outboard motor locks, applied specifically to securing the propeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the McGard 74039?\u003c\/strong\u003e The 74039 measures 6.9 x 5.8 x 1.4 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 74039 fit Mercury Optimax and Verado engines?\u003c\/strong\u003e Yes, it is designed for Mercury Optimax 75 HP and larger and Verado 135 HP and larger outboards.\u003c\/p\u003e","brand":"McGuard","offers":[{"title":"Default Title","offer_id":49028238934235,"sku":"MCG-74039","price":76.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/MCG-74039_lg__33654.1558139798.500.750.jpg?v=1785165227","url":"https:\/\/www.goodvibesmarina.com\/products\/mcgard-74039-propeller-lock-3-4-16-thread-mercruiser-alpha-i-bravo-i-omc-cobra-mercury-70-hp-johnson-evinrude-150-hp-outboards","provider":"Good Vibes Marina","version":"1.0","type":"link"}