1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 89Get this manual
AccuMixTM AccuMix is an oil injection system that delivers constant 100: 1
fueloil ratio to the engine at all speedsFuel Tank
i tuneup or major repairDrain tank at an outdoor
Drain and flush the tank at least once year, and at every
location, away form a" possible sources of ignition Anyone of he oil reservoir screws can be removed to drain fuel from the ankClean the tank by flushing with clear gasoline or mild solventCleaning, Inspection and Repair 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 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 condition Never use patched or repaired fuel tank that could allow fuel leakageIgnition of this leakage could result in fire or explosion