Service Manual

Part Numbers
71-6010
Purpose
It is part of the system that tells the coil when to fire.
How It Works
Any time a magnet passes by a coil of wire on an iron core, electricity is
produced. The “ignition rotor” is simply two magnets molded into a plastic
housing which properly positions it on the crankshaft. As the crankshaft
rotates, the magnets pass by the “ignition control” which houses a coil and
the “trigger” circuitry. This generates the small amount of electricity
needed to run the ignition control. In addition, the orientation of the
magnets on the crankshaft provides “timing” for the engine.
Testing
Two simple tests can be performed with a flat bladed screwdriver:
1. Pinch the handle end of a flat bladed screwdriver between your thumb
and forefinger so that the screwdriver dangles. Bring the flat part of
the blade to within 1/4 inch of one of the magnets. The screwdriver
should be drawn toward the rotor.
2. With the rotor removed, each magnet should be able to support the
weight of the rotor when hung from the blade of a flat bladed
screwdriver. If the rotor fails either test, the magnet has lost its
strength and should be replaced.
Part Numbers
113358
Purpose
This electrical component monitors the level of fuel in the tank.
How It Works
A float is attached to a pivoting lever. This lever rotates a potentiometer (a
device much like the volume control on your stereo) to vary the resistance.
The resistance will be 25 to 200 ohms, plus or minus 20%.
Testing
1. Before removing the unit, verify that the float has not sunk. Replace the
float if it has sunk.
2. Disconnect the sender unit from the wiring harness, and remove it from
the tank.
3. Verify that it matches the resistances in the table.
Rotor
Ignition
Sender
Fuel Level
Float Position Resistance
Full 25W ± 20%
Empty 200W ± 20%
Table 1
Glossary
GLOSSARY
Demystification Guide 3-17