EC05-2 - Jacks Small Engines

7-3-3 FOR TIMING ADJUSTMENT, THE FOLLOWING PROCEDURES USING A TIMING,TESTER:
Disconnect the stop button lead wires and the coil primary wire.
Remove blower housing from engine.
Connect the timing tester lead with red rubber cap to
the coil primary wire and ground the lead with black
rubber cap to crankcase. (See Fig. 7-3-3.) While the
points are open, the buzzer within tester remains ringing
and when the points are closed, the tester remains
silent.
Turn flywheel slowly counter-clockwise (D type and
TIMI
V type engines) or clockwise (B type engines) until the
buzzer within tester becomes silent.
Then, turn flywheel very slowly clockwise (D type and
V type engines) or counter-clockwise (B type engines)
\
GROUND WIRE
and stop immediately the moment the buzzer within
tester begins ringing. Fig. 7-3-3
Check if line mark on the flywheel is in the line with line mark on the crankcase. When the line marks are in alignment,
the timing is correct.
If the timing mark lines are not in alignment, then readjust the point opening according to the BREAKER POINT AD-
JUSTMENT, by-removing the flywheel and repeat the checking procedures 3) through S).
Afer completing the timing adjustment re-mount the blower housing and connect the coil to primary the stop lead button.
MAGNETO’ TROUBLE SHOOTING
When the engine does not start or starts with difficulty, or when its operation is unstable, the following tests
they are caused by a defect in the magneto.
will clarify if
1) Check ignition cable for possible corrosion, broken, worn insulator or loose connection.
2) Check the sparking as described later in this section.
3) Check if the breaker points require cleaning, or adjusting or not. If the points are badly corroded or pitted. Condenser
may have to be replaced.
Refer to “BREAKER P0IN.T ADJUSTMENT”
4) If no spark takes place, replace ignition coil.
SPARK TESTING
Remove spark plug from cylinder head and place it on blower housing, with the ignition cable connected to it.
Crank the’ engine several times by starting pulley and observe the spark in the spark gap of spark plug. If the spark is strong,
the ignition system can be eliminated as the source of trouble.
If the spark is weak or there is no spark at all, repeat the checks according to the procedures 1) through 3) above. The
The correct electrode gap is 0.5 - 0.7 mm.‘ (Refer to section 12. CHECKS and CORRECTION.”)
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