89211-170-000 Plug Wrench Bar - Overview. The 89211-170-000 Plug Wrench Bar is a specialized tool designed specifically for Honda marine engine systems. It plays an essential role in the maintenance and replacement of spark plugs, ensuring your engine operates reliably and efficiently. This wrench bar is manufactured to meet exact Honda factory specifications, providing a perfect fit and seamless integration with existing engine components, which keeps your marine engine performing at its best w