1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 84Get this manual
dSince dry bearings rust rapidly, lubricate them at once in light, clean oilRotate them few times and, after draining the excess oil, place them in covered container until reassemblyeDiscard bearings which show any of the following: (1) Rusted balls, rollers, or raceways(2) Fractured raceThis may be caused by forcing cocked bearing off shaft, or by too heavy press fit(3) Worn, galled, or abraded surfaceThese may be caused by too loose fit, or bearing locked by dirt and turning on shaft or in housing(4) Badly discolored balls, rollers, and racesThis is usually due to an inadequate supply of lubricantModerate discoloration of balls and raceways is not cause for discardPISTONS Check the pistons for roundness, excessive skirt wear, and scoringThe piston skirts must be perfectly round and unscratched to prevent the entry of exhaust gases into the compression chamberCarefully remove carbon deposits from outside and inside piston head with care, do not round off deflectorInspect the ring grooves for carbon accumulation,