117
ELECTRICAL AND IGNITION
TIMING ADJUSTMENTS
6
TIMING ADJUSTMENTS
Timing Pointer
The timing pointer must be adjusted to indicate
top dead center (TDC) of the number 1 piston.
This reference to the position of the number 1 pis-
ton is used to synchronize the electronic timing
controlled by the EMM with the mechanical posi-
tion of the number 1 piston.
Always check timing pointer adjustment before
using the Evinrude Diagnostics software Timing
Verification procedure.
Remove spark plugs. Rotate the flywheel clock-
wise to approximately 30° ATDC.
Install Piston Stop Tool, P/N 342679, into the
spark plug hole of the number 1 cylinder.
Rotate flywheel counterclockwise until the num-
ber 1 piston contacts the tool. Keep pressure on
the flywheel to position the piston firmly against
the tool. Mark the flywheel directly across from the
pointer. Label this mark “A.”
Rotate the flywheel clockwise until the piston
contacts the tool. Mark the flywheel directly across
from the pointer. Label this mark “B.” Rotate fly-
wheel counterclockwise slightly to release tool
then remove it from spark plug hole.
Use a flexible measuring device, such as a piece
of string, to find the exact center between marks
“A” and “B.” Measure along the edge of the fly-
wheel. Mark and label the center point “C.”
If mark “C” and the cast-in TDC boss on flywheel
are in alignment, the timing pointer is in the cor-
rect location.
If the pointer alignment is NOT correct, rotate the
flywheel clockwise to align the mark “C” with the
pointer. Hold the flywheel in this position. Loosen
the pointer retaining screw and adjust the pointer
A WARNING
To prevent accidental starting while servic-
ing, disconnect the battery cables at the
battery. Twist and remove all spark plug
leads.
1. Piston stop tool 006493
1. Timing pointer 006552
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