1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 55Get this manual
65 and 100 Models 1-2"
PRIMARY LO CAT ION319886 (OPTIONAL )
318273 (OPT IONAL )
NOTEUSE TOP HOLES AND BOTTOM HOLES MARKED PRIMARY LO CA TION IF TRAN SOM PERMITSAS THI IS THE MOST DESIRABLE LOCATION DUE TO INTERNAL RIBBING ON SOME BOAT TRANSOM SIT MAY BE DESIRABLE TO USE TWO (2) HOLES MARKED LTERN ATE OC ATION INSTEAD OF TWO (2) HOLES MARKED PRIMARY LOCATION IF SO USE TWO (2TOP HOLES AND TW (2) AL TERNATE LOCATION HOLESDRILL ON LY FOUR (4) HOLES IN EITHER CASE 'BOL S, NUTSWASHERS ED TO SECURE ENGINE TO CROSSBAR IN HIPPING CARTON ARE ALL USED TOMOUNT ENGINE TO BOAT '32024 318572
CENTER TRAN SO DRILL FIXTURE (PI 385368 NOT SUPPLIED WITH ENGINEON OUTSIDE OF TRAN SOM IF FIXTURE IS NOT USEDTHE ENGINE ITSELF CENTERED ON TRANSOM CAN BE USED TO LOCA TE THE MOUNTING HOLE POSITIONS OR THEY MAY BE LAID OUT USING THE DIMENSIONS ON TH IS ILLU STR AT ION LOCATE ONLY FOUR (4) HOLES AS INDICATED SEE NOTE FOR ALTERNATE HOLE LOCATIONSDRILL ONL FOUR (4) 1 2" DIAMETER HOLES THROUGH TRAN SO MAKE CERTAIN DRILLED HOLES ARE SOUARE WITH TR ANSOM SURFACE SECURE LOWER BOLTS TO TRANSOM BY ALIGNING BO LT HEADS WITH PLATES AND ASSEMBLING AS SHOWN (OPTIONAL)