2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 45Get this manual
INSTALLATION AND PREDELIVERY FUEL AND OIL
FUEL AND OIL
Fuel Requirements
WARNING
Gasoline is extremely flammable and highly explosive under certain conditionsImproper handling of fuel could result in property damage, serious injury or deathAlways turn off the outboard before fuelingNever permit anyone other than an adult to refill the fuel tankDo not fill the fuel tank all the way to the top or fuel may overflow when it expands due to heating by the sunRemove portable fuel tanks from the boat before fuelingAlways wipe off any fuel spillageDo not smoke, allow open flames or sparks, or use electrical devices such as cellular phones in the vicinity of fuel leak or while fueling