1974 Johnson 135 HP Outboard Motors Service Repair manual P/N JM-7412, Page 81Get this manual
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kRemove drain plug and magnet assemblyRemove forward gear, bearing al1d thrust washer1 Remove oil from gearcase using Slide (Special #311887) and two 14-20 Threaded Rods 16" longSee Figure 6-21 If nec