1997 Johnson Evinrude "EU" Accessories Service Manual, P/N 507270, Page 73Get this manual
Testing
Omitting the tank pressure test may result in returning fuel system to service which could leak liquid or vaporized fuel, resulting 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 transport15827