2008 Evinrude E-TEC 55MFE Technical Manual, Page 243Get this manual
GEARCASE GEARCASE LEAK TEST
GEARCASE LEAK TEST
Drain lubricant before testingInstall 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 testInstall vacuum test gaugeApply to inof vacuum (76 to 127 mm) Hgwith pumpCheck for leaksIf leakage occurs, apply oil around suspected sealIf leak stops or oil is drawn in, that seal is defectiveRepeat test, gearcase must hold minimum of 15 invacuum (381 mm) Hg