1983 Johnson/Evinrude 2 thru V-6 outboards Service Repair Manual P/N 393765, Page 72Get this manual
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7075 Long Shaft and V-4 NOTE: USE TOP HOLES AND BOTTOM HOLES MARKED PRIMARY LOCATION IF TRANSOM PERMITS, AS THIS IS THE MOST DESIRABLE LOCATION DUE TO INTERNAL RIBBING ON SOME BOAT TRANSOMS, IT MAY BE