As a boat owner, you know that every engine component makes a difference, even down to the marine drain plugs. And at Discount Inboard Marine, we couldn't agree more! That's why we offer reliable, trusted boat drains and plugs that provide you with a smooth and worry-free trip out on the water, every time. No matter your inboard ski boat engine drainage needs, we have the right marine drain plugs from the brands you can trust. From winterizing inboard boat motors to prepping your vessel for summer, Discount Inboard Marine has you covered.