2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 175Get this manual
GEARCASE LEAK TEST PROCEDURE
LEAK TEST PROCEDURE
Drain lubricant before testing
REMOVAL AND INSTALLATION
Removal
Install lubricant drainfill plug and seal, thread pressure test gauge fitting and seal in lubricant level holePressurize to psi (21 to 42 kPa)If pressure gauge indicates leakage, submerge the gearcase in water to determine source of leakIf the gearcase pressure gauge does not indicate leakage, increase pressure to 16 to 18 psi (110 to 124 kPa)Check for leakageMake necessary repairs and repeat test&
WARNING
To prevent accidental starting while servicing, twist and remove all spark plug leadsDuring service, the outboard may drop unexpectedlyAvoid personal inJury; always support the outboard's weight with suitable hoist or the tilt support bracket during serviceRemove the shift lever retaining pinPush the shift lever toward the powerhead to disengage shift rod lever from the lower shift rod on the port side of the outboard