1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 211Get this manual
6.25 in(635 mm) ModelsPlace water tube spacer grommet on the impeller housing cover
Cleaning and Inspection
& Replace2
damaged componentsShift system failure will cause loss of control over direction of engine thrust1Discard all seals, O-rings, gaskets, and the clutch dog spring
Clean all gearcase components in solvent and dry with compressed airTo avoid personal injury, wear eye protection and regulate air pressure to not more than 25 PSI (172 kPa)After cleaning, coat all internal components with OMC Ultra-HPF gearcase lube to prevent rusting
3Perform the following inspections: Gearcase housingall gasket surfaces must be free of gasket materialAll threaded holes must be free of corrosion and sealerUpper driveshaft oil circulation hole must be clear
Hydrostatic seal ringsmust be in good condition to help prevent propeller ventilationif anodes have eroded to two-thirds their original size, they must be replacedRefer to Section for testing procedure