16951Q1 Stern Drive or Inboard Engine Block or Manifold Brass Drain Plug 

Engine block or manifold drain plug 16951A1 fits most MerCruiser stern drive or inboard engines blocks and manifolds to make draining cooling water for winterizing or changing anti-freeze easier. Can be used with engines equipped with closed cooler or raw water cooling systems. May also fit other brands of stern drive or inboard engines and manifolds. See your owner's manual for installation instructions and application information. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and powersports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.

• Machined brass engine block or manifold drain plug with 1/4" NPT fitting
• Easy to install with common tools
• Replaces worn or damaged plugs to make winterizing your engine easier
• Produced by Mercury Marine to our stringent original equipment manufacturer specifications to maximize the performance of your Mercury and Mariner outboard or MerCruiser stern drive