8.5
Section 8
Electrical System and Components
8
Oil Sentry™
Switch
Lead
Upright =
Continuity
Upside down =
No Continuity
Problem Test Conclusion
Engine
Will Not
Start
6. Set an ohmmeter to the Rx1K or Rx10K scale
and zero. Connect one ohmmeter lead to the
kill lead (black/white) terminal and connect
the other lead into the spark plug cap.
a. Remove the cap from the spark plug
lead and test the resistance of the cap
alone.
b. If resistances are other than specifi ed,
remove the blower housing and
remove the ignition module. With the
kill lead and spark plug cap removed,
test resistance from the small spade
terminal to the core of the spark plug
lead wire.
6. Resistance of the ignition module should
be 13.5-18.0 K ohms.
a. Resistance of the cap should be 4-6 K
ohms.
b. Resistance should be 9.5-12.9 K ohms.
If resistance is not in this range,
replace the module.
7. Set an ohmmeter to the Rx1 scale and zero
the meter. Test the ignition/key switch as
follows.
a. Trace the two black leads from the
ON/OFF switch and separate them
from any connections. Connect the
ohmmeter leads to the switch leads,
and check for continuity in both switch
positions.
b. On electric start engines, trace the
four leads (red, red/white, black,
black/white) from the key switch and
separate them from any connections.
Connect the ohmmeter leads to the
black and black/white leads and
check for continuity in all three switch
positions. Then connect the ohmmeter
leads to the red and red/white leads
and test again in all three switch
positions.
a. Continuity should be indicated when
and only when switch is in the OFF
position. Replace switch for any other
results.
b. Continuity should be indicated
between the black and black/white
leads only when the key switch is in
the OFF position. There should be
continuity between the red and red/
white leads only in the start position.
Replace switch for any other results.
Figure 8-3. Oil Sentry™ Function Check.
Figure 8-4. Oil Sentry™ Continuity.
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