1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 85Get this manual
Fuel Tank Testing fuel system to service which could leak liquid or vaporized fuelIgnition of this leakage could result in fire or explosionWhenever fuel tank or line has been serviced or has had parts disassembled, the unit must be tested to ensure that the repaired or reassembled portion will not leak or emit fumesSimply adding fuel to the tank and checking for leakage is not an adequate test, as leakage or fumes may occur only when the tank's contents have been pressurizedAs examples, pressurization can occur when the tank is left in sunlight, or when the fuel is agitated, as might occur during transport ill
J:Omitting the tank pressure test may result in returning a
Tools needed are Stevens Gearcase Pressure Tester Model S34 and OMC Fuel Tank Pressure Test Adapter PI 389945 compressed air supply is also needed
there are sparks or open flamesOnce air pressure is applied to tank, gasoline traces may be expelled as vapor or mistGasoline in these forms is extremely flammable and highly explosive1Remove fuel cap and disengage from tankRemove anchor from uel cap 2Empty fuel tank completelyUse common baster to remove the last of the fuelI Note I'f any fuel remains in the tank during testingit could conceal the presence of leakage852070