Sierra 18-7480-9 Marine Quad Ring - Pack of 5

The Sierra 18-7480-9 is a marine-grade quad ring seal designed for use in raw water pump applications on inboard and stern drive engines. Quad rings, also known as X-rings, feature a four-lobed cross-section that provides superior sealing performance compared to standard O-rings, reducing friction and extending service life in demanding marine cooling system environments.

This quad ring is commonly used in conjunction with water pump impeller service and is compatible with Sierra's 18-3060 and 18-3061 impellers, making it an ideal part to replace during routine impeller maintenance. Each package contains five quad rings, providing enough seals for multiple service intervals.

Key Features:

• Four-lobed quad ring design for enhanced sealing over standard O-rings
• Engineered to meet or exceed OEM specifications
• Compatible with Sierra 18-3060 and 18-3061 water pump impellers
• Interchangeable with Pleasurecraft R047111
• Sold as a package of five quad rings
• Ideal for use during water pump impeller replacement service

Sierra International is a trusted manufacturer of aftermarket marine engine parts. The Sierra 18-7480 quad ring is a reliable, cost-effective replacement seal to keep on hand for scheduled cooling system maintenance.