1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 203Get this manual
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REASSEMBLY L Install starter terminalinsulator, washers aod re taining nut in frame(Figure 10) Be ure to posilion Ia in sc rew pe rp ndi !:u lar to fnlme end surface 2P osi ti on oi ls an pole pieces