Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 90Get this manual
5Find Top Dead Center as followsAHold rod tightly against piston and rotate crankshaft clockwise two full turns and stop at top dead center (TDC) This is where timing tool rod completely stops moving BScrew barrel of the timing tool in or out until inside line of the timing rod lines up with edge of barrelFigure 46 CAUTION
When outer line of rod is on edge of barrelpiston is at 32 Before Top Dead Center (BTDC)Figure 47
If dial indicator is used, 32 is equal to .278 (6.95 mm)As rod is coming out of barrelcheck from time to time to see where outer line is in relation to end of barrel If outer line goes beyond edge of barrelengine must be rotated clockwise again 7Check timing marks as follows :
A32 mark on decal must line up with index mark on timing pOinter