Amazon Secure Payment System Continue shopping “McGard 74019 Marine Twin Stern Drive Lock Set (7/16″- 20 Thread Size) – MerCruiser/OMC – Set of 2” has been added to your cart. Product Price Quantity Subtotal × Sierra International 18-8533 Marine Exhaust Manifold Mounting Kit for Mercruiser Stern Drive $24.35 Sierra International 18-8533 Marine Exhaust Manifold Mounting Kit for Mercruiser Stern Drive quantity $24.35 × McGard 74019 Marine Twin Stern Drive Lock Set (7/16"- 20 Thread Size) - MerCruiser/OMC - Set of 2 $48.07 McGard 74019 Marine Twin Stern Drive Lock Set (7/16"- 20 Thread Size) - MerCruiser/OMC - Set of 2 quantity $48.07 Coupon: Apply coupon Update cart Cart totals Subtotal $72.42 Total $72.42 Proceed to checkout