1972 Evinrude StarFlire 125 HP Outboards Service Manual, PN 4822, Page 45Get this manual
TIMING POINTER ADJUSTMENT Engine depends on the accuracy of ignition timing and carburetor synchronizationIf major powerhead components have been replaced, or timing pointer disturbed, the pOinter should be re-checked against the TDC mark on the flywheelTo check and adjust, proceed as follows:
1Disconnect spark plug leads and remove spark plugs
2Temporarily set timing pointer mid-way in its adjusting slotSee Figure 4-27AUsing Piston stop Assembly (Special Tool #384887, Figure 4-27), install tool in No1 cylinder spark plug holeTurn flywheel clockwise until piston contacts end of toolAdjust tool to 12 TDC and lock tool3Mark line on rim of flywheel opposite timing pointerNow turn flywheel counterclockwise until piston contacts toolMark line on rim of flywheel opposite pointer4Using scale, measure the mid-point between the two linesMark the mid-point line on the rim of the flywheelIf the mid-point line and the cast-in TDC mark on the flywheel are in agreement, the timing pointer alignment is correctIf not, proceed to Step 55Turn the flywheel to align the mid-point mark with pointer (hold flywheel in this position)Loosen pOinter adjustment screw and move pointer to align with cast-in TDC mark on flywheelSee Figure 4-27ATighten adjustment screw6Check timingSee Page 4-7, Step 9MERC-O- TRONIC