Section 07 ENGINE MANAGEMENT (DI)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
With this ignition system, the ignition timing set-
ting can be checked with either the engine hot
or cold. Also, the ignition timing setting is to be
checked at any RPM with the timing light. The ig-
nition timing setting is best checked at idle speed
as it is more accurate and easier than at higher
speed, also it will keep the engine temperature
lower for a longer time. Ensure to properly cool
theenginethroughtheflushingfitting.
NOTE: When checking the ignition timing setting,
the spark advance has to be locked to allow prop-
er verification of the timing mark. See IGNITION
TIMING ADJUSTMENT below.
Static Test
– Disconnect MAG side spark plug wire and
connect wire to grounding device then remove
spark plug.
CAUTION: Never crank engine with spark plugs
removed unless spark plug cables are connect-
ed to the grounding device.
– Remove PTO flywheel guard.
– Remove middle screw securing the engine to
the rear engine mount. Reinstall screw with
timing mark pointer tool.
1
F12R1IA
1. Timing mark pointer tool (P/N 295 000 135)
– Install and adjust a TDC gauge (P/N 414 104
700) in MAG side spark plug hole.
– Ensure to install its roller to allow proper reading
of the gauge. Proceed as follows:
– Rotate magneto flywheel clockwise until piston
is just Before Top Dead Center.
1
F12R0VA
2 3
45
TYPICAL
1. Outer ring
2. Adaptor lock nut
3. Adaptor
4. Roller
5. Roller lock nut
– Install roller on dial gauge end. Ensure to posi-
tion roller edge parallel with the dial gauge face.
Secure in this position by tightening roller lock
nut. This will keep the roller in the proper axis
for measurement accuracy.
– Loosen adaptor lock nut then holding gauge
with dial face directed toward you when you
are in line with the crankshaft, screw adaptor
in spark plug hole.
– Slide gauge far enough into adaptor to obtain a
reading then finger tighten adaptor lock nut.
– Sinceweareworkingwithanindirectmeasure-
ment, ensure that dial gauge face is positioned
in the same direction as the connecting rod.
– Rotate magneto flywheel clockwise until piston
is at Top Dead Center.
– Unlock outer ring of dial and turn it until “0”
(zero) on dial aligns with pointer.
– Lock outer ring in position.
– From this point, rotate magneto flywheel back
1/4 turn then rotate it clockwise to reach
7.87 mm (.310 in).
smr2004-Complete Line Up 369
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