Section 05
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
SMR2000-051-05-03A.FM
05-03-29
NOTE:
If PTO ignition coil is replaced, ensure to
reinstall the white tape on the new coil on if it is
not present.
TDC SETTING
General
Before checking TDC setting with a stroboscopic
timing light (dynamic test), it is mandatory to
scribe a timing mark on the PTO flywheel (static
test) corresponding to the specific engine.
Also, the mark scribed on the PTO flywheel can
be used to troubleshoot a broken magneto woo-
druff key.
NOTE:
Do not use the factory mark found on the
PTO flywheel to check TDC setting or trouble-
shoot any problems.
Normally TDC setting should not be required. It
has been set at factory and it should remain cor-
rectly set since every part is fixed and not adjust-
able. The only time the TDC setting might have to
be changed would be when replacing the crank-
shaft, the magneto rotor, the CPS, the encoder
wheel or the MPEM. If the TDC setting is found
to be incorrect, you should first check for proper
crankshaft alignment. This might be the indication
of a twisted crankshaft.
With this ignition system, the TDC setting can be
checked with either the engine hot or cold. Also,
the TDC setting is to be checked at any RPM with
the timing light. The TDC setting is best checked
at idle speed as it is more accurate and easier than
at higher speed, also it will keep the engine tem-
perature lower for a longer time. Ensure to prop-
erly cool the engine through the flushing fitting.
NOTE:
When checking the TDC setting, the spark
advance has to be locked to allow proper verifica-
tion of the TDC marks. See
TDC Setting
below.
Static Test
1. Disconnect MAG side spark plug wire and con-
nect wire to grounding device then remove
spark plug.
CAUTION:
Never crank engine with spark
plugs removed unless spark plug cables are
connected to the grounding device.
2. Remove PTO flywheel guard.
3. Remove middle screw securing the engine to
the rear engine mount. Reinstall screw with
timing mark pointer tool.
1. Timing mark pointer tool (P/N 295 000 135)
4. Install and adjust a TDC gauge (P/N 295 000
143) in MAG side spark plug hole.
5. Ensure to install its roller to allow proper reading
of the gauge. Proceed as follows:
– Rotate magneto flywheel clockwise until pis-
ton is just Before Top Dead Center.
1. Outer ring
2. Adaptor lock nut
3. Adaptor
4. Roller
5. Roller lock nut
– Install roller on dial gauge end. Ensure to po-
sition roller edge parallel with the dial gauge
face. Secure in this position by tightening roll-
er lock nut. This will keep the roller in the
proper axis for measurement accuracy.
F06H05A
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F12R0VA
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Summary of Contents for 2001 RX
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