1993 Johnson Evinrude "ET" 2 thru 8 Service Manual, P/N 508281, Page 66Get this manual
Fuel Tank Servicing -
i tune-up or major repairDrain tank at an outdoor loca-
Drain and flush the tank at least once year and at every
tion, away from all possible sources of ignitionA drain screw is provided in the fuel tank upper housingShake the tank before draining to mix sedimentsClean the tank by flushing with clear gasoline or solventPrimer pump, screens, etc may be inspected and cleaned as described belowRefill the tank with the correct fuel mixtureCleaning and Inspection If the tank or hose appears to be leaking fuel or fumes, pressure test tank and hose assembly before doing any disassemblyClean the fuel tank and inspect for rust or leakageReplace tank if badly rusted or if it has developed leaks in the metal body
ill even though these materials are sold as being suitable for
fuel tank repairGenerally, these materials are sold for repairing automotive fuel tanks and are not suitable for portable marine tanks, which are subjected to much higher pressure and vacuum conditionsNever use patched or repaired fuel tankIf the repair fails, the tank will leak fuel which could igniteFuel Pickup, Screen, and Nipple Assembly