There is nothing more important than priming your fuel system correctly for crisp starts every time. Even after running out of fuel or swapping out a fuel filter trust you can prime the fuel system when you need to. Beware of inferior substitutes that cannot maintain the reliability Yamaha customers have grown to expect. Yamaha fuel lines and connectors meet industry standards and withstand the elements our harsh environment can punish them with. Standard on all new Yamaha outboard motors.