Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 12Get this manual
Taking On Fuel The fuel tank of your boat should be kept full to prevent water from entering the system through condensation caused by temperature changesWater droplets forming is one of the greatest enemies of the fuel systemBy keeping the tank full, the air space in the tank is kept to an absolute minimum and there is no room for moisture to formIt is good practice not to store fuel in the tank over an extended period, say for six monthsToday, fuels contain ingredients that change into gums when stored for any length of timeThese gums and varnish products will cause carburetor problems and poor spark plug performanceAn additive (Sta-Bil) is available and can be used to prevent gums and varnish from formingStatic Electricity In very simple terms, static electricity is called fr icti onal electr ici tyIt is generated by two dissimilar materials moving over each otherOne form is gasoline flowing through pipe or into the airAnother form is when you brush your hair or walk across synthetic carpet and then touch metal objectAll of these actions cause an electrical chargeIn most cases, static electricity is generated during very dry weather conditions, but when you are filling the fuel tank on your boat it can happen at any timeFuel Tank Grounding One area of protection against the buildup of static electricity is to have the fuel