For 2006-2020 Yamaha Fuel Filter Water Separator Wrench, Similar to YB-ACC04 18-79815 A Must Have Tool for Yamaha Outboard. While it may seem like a simple process to remove the fuel water separator filter from an outboard motor. A pair of pliers may get the job done. However, you may damage the outer cover of the filter housing which may crack or fail over time if you don't use this effective and well-made tool. This wrench is simple to use, you can easily change and tighten the fuel filter for avoiding leaks. without outer damage to the filter cover. Well worth the money to ensure the job is done right. Special Purpose Tool: .