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Timing Pointer Adjustment1977 Evinrude 175HP - 200HP repair manual

Engine performance depends on the accuracy of ignition timing and carburetor synchronization. If major power head components have been replaced, or timing pointer disturbed, the pointer should be re-checked against the TDC mark on the flywheel. To check and adjust, proceed as follows:

1. Disconnect spark plug leads and remove spark plugs.
2. Temporarily set timing pointer mid-way in its adjusting slot. See Figure 4-39.
   Install Piston Stop Assembly Tool (Special Tool #384887) in No. 1 cylinder spark plug hole. Turn flywheel clockwise until piston contacts end of tool. Adjust tool to 120 TDC and lock tool.
3. Mark a line on rim of flywheel adjacent to timing pointer. Now turn flywheel counterclockwise until piston contacts tool. Mark a line on rim of flywheel opposite pointer.
4. Using a scale, measure the mid-point between the two lines. Mark the mid-point line on the rim of the flywheel. If the mid-point line and the cast-in TDC mark on the flywheel are in agreement, the timing pointer alignment is correct. If not, proceed to Step 5.
   
   Figure 4-39
5. Turn 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 flywheel. See Figure 4-39. Tighten adjustment screw.
6. Check timing.

Updated on: Saturday, November 7, 2020