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Do not attempt to diagnose such problems
yourself. Instead, take the vehicle to a
service center. You should periodically
remove and inspect the spark plug because
heat and deposits will cause the spark plug
to slowly break down and erode. If electrode
erosion becomes excessive, or if carbon and
other deposits are excessive, you should
replace the spark plug with the specified
plug.
Specified spark plug:
DCPR7E (NGK)
Installation
1. Measure the electrode gap with a wire
thickness gauge and, if necessary, adjust
the gap to specification.
Spark plug gap:
0.023-0.027 in (0.6 - 0.7 mm)
Periodic Maintenance and Adjustment
a. Spark plug gap
2. Clean the surface of the spark plug
gasket and its mating surface, and then
wipe off any grime from the spark plug
threads.
3. Install the spark plug and tighten it to the
specified torque.
Tightening torque:
Spark plug:
12.7 ft·lbf (17.5 Nm, 1.75 m·kgf)
8-25
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Questions and answers
Fuel gauge not indicating proper fuel level
The manual does not provide specific instructions for fixing a fuel gauge issue on a Cub Cadet Challenger 500. However, general troubleshooting steps for electrical components include checking voltage, resistance, and amperage. If the fuel gauge is not working, inspect the wiring connections, test the fuel level sensor, and ensure the ECU is functioning correctly. If necessary, re-flash the ECU following the provided procedure. If the issue persists, replacing the faulty component may be required.
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