if you store it w ethanol gasoline in it it is best to use a gas treatment to forestall corrosion within the fuel program.If useing a portable gas tank make sure the vent is open up about the cap
Yamaha Motors on the https://lewysyxnt227532.eedblog.com/29726021/the-2-minute-rule-for-yamaha-90-hp-outboard-for-sailboats