Fuel Tank Servicing
1994 Johnson/Evinrude 9.9-30HP models
Drain and flush the tank at least once a year, and at every tune-up or major repair.
Drain tank at an outdoor location, away from all possible sources of ignition. A drain screw "A" is provided in the fuel tank upper housing. Shake the tank before draining to mix sediments. Clean the tank by flushing with clear gasoline or solvent. Primer pump, screens, etc., may be inspected and cleaned as described below. Refill the tank with the correct fuel mixture.
Cleaning and Inspection
If the tank or hose appears to be leaking fuel or fumes, pressure test tank and hose assembly before doing any disassembly.
Clean the fuel tank and inspect for rust or leakage. Replace tank if badly rusted or if it has developed leaks in the metal body.
Never apply patching materials to an outboard fuel tank, ill even though these materials are sold as being suitable for fuel tank repair. Generally, 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 conditions. Never use a patched or repaired fuel tank. If the repair fails, the tank will leak fuel which could ignite.
Updated on: Wednesday, November 11, 2020