Enhance the performance and longevity of your Mercury outboard with the Flushmaster Flush Port Quick Connect. Designed to permanently replace the OE flush port, the Flushmaster Quick Connect is crafted from marine-grade materials, ensuring durability and a secure, leak-free connection. Featuring a secured locking cap and a corrosion-resistant 316 stainless steel spring. This easy-to-install, reliable Flush Port Quick Connect is engineered for 4-stroke Mercury outboards with a flush port connection from 75 to 500 hp. This solution simplifies the flushing process and ensures optimal engine maintenance every time.• Permanent OE replacement for seamless integration• Marine-grade construction for maximum durability• Leak-free performance with secured locking cap• 316 stainless steel spring that resists rust and seizing• Compatible with 4-stroke Mercury outboards with a flush port from 75 to 500 hpNOTE: The opening in the top of the Mercury Quick Connect cap serves as an indicator of check valve failure and is required by the OEM. Secured locking cap 316 stainless steel spring resists rust and seizing Compatible with 4-stroke Mercury outboards with a flush port from 75 to 500 hp | Flush Port Quick Connect for Mercury