1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 916Get this manual
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OVERALL TORQUES at PROPSHAFT MERCRUISER n-TRS COMPLETE DRIVE UNIT
30 34 31135 32 36 33 37 34 38 3539 3640 37 41 3842 39 43 40 44 41 45 42 46 4347 44 48 45 49 4650 47 5 4852 49 53 5054 515