Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 210Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 210

GEAR HOUSING
Drive Shaft
1Replace drive shaft if any of the following conditions exist: aSplines are twisted or wornbLower drive shaft needle bearing race surfaces are pitted or wornReplace corresponding bearing as wellcOil seal surfaces are deeply grooved or pitted allowing grease to wash off crankshaft splines or water to enter gear housingaSplinesBearing Race SurfaceOil Seal Surface

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