12342-RYE-004 Spark Plug T Seal - Overview. The 12342-RYE-004 Spark Plug T Seal is an essential component in Honda marine engine systems. This genuine OEM spark plug tube seal is designed to create a tight seal around the spark plug tube, preventing oil leaks and ensuring efficient engine operation. It seamlessly fits into the spark plug system of multiple Honda marine engines, maintaining system integrity and performance durability.. Key Features. OEM quality spark plug tube seal ensuring exact