| Recommended
Tools: |
| for
DVA: |
Fluke Multimeter with
CDI #511-9773 Peak Adapter, (or CD-77) and CDI
#511-9770 |
|
CDI #511-9701 Battery CD
Tester |
|
CDI #511-9766 Spark Gap
Tester |
|
Jumper
Wires |
|
A Reliable Volt/Ohm
Meter (if the CD-&& is used for the
DVA |
| CAUTIon; DO NOT use a maintenance free battery with
these types of ignitions as they tend to overcharge and blow the
packs. Typically 17 Volts +. |
|
| Note: A large portion of the problems with the
battery CD units are caused by low battery voltage or bad ground
connections or high battery voltage. Low Voltage symptoms are
weak erratic firing of cylinders. Misfiring after a few minutes
of running can be caused by excessive (Over 15.5 Volts DC)
voltage at the pack - See #2 below. |
| |
| 1) Check
all battery and ground connections. |
|
| 2) Check
the Voltage on the red (or purple) Wire at the CD
Unit. |
| If the voltage is less than 9 1/2 volts during
the cranking there is a problem in the battery circuit. These
units require at least 9 1/2 volts to fire properly. Connect a
jumper Wire directly from the battery (+) terminal to the red (or
purple) Wire. Retest. ATTENTIon: In order to kill the engine if
it cranks, the jumper Wire must be disconnected and/or choke the
engine. If the engine still fails to crank, recheck voltage as
above. If low, replace the battery and retry. Warning: Check he voltage on the red (or purple) Wire at
the CD Unit through the RPM range. At no time should the voltage
exceed 15.5 Volts DC. |
|
| |
| 3)
Disconnect points and/or sensor Wire and connect a battery
tester. |
| Hook up the Battery CD Tester according to the
operators manual and align rotor with spark plug Wire. Connect a
spark gap to all spark plug wires and turn the Ignition switch
on. If the CD Unit fires only to one spark plug Wire, check the
points, sensor, anti-reverse spring and wires for breaks and
shorts. If ANY other spark plug Wire fires besides the one the
rotor is aligned with, the distributor cap and rotor should be
replaced. The Battery CD tester will fire the system to
approximately 3000 RPM. If the Battery CD tester (511-9701) is
not used, strike points Wire against engine ground. for the
sensor, strike the two wires together. The CD Unit should fire
every time. If the CD Unit fails to fire, it is usually bad. |
|
| |
| 4) Points
type Ignition. |
| Disconnect points Wire and check voltage on the
points Wire. You should read close to battery voltage with the
key switch on. No voltage means a bad pack. If OK, reconnect the
points Wire. Using the piercing probes (511-9770) connect the DC
volt meter to the points Wire. Turn the switch on and slowly
rotate the flywheel. You should see the voltage fluctuate up and
down. |
|
| |
| 5) Check
the Ignition coil. |
| An open, cracked or poorly grounded coil can
burn out a battery CD Unit. |
|
| |
| 6) Check
the DVA voltage on the primary input Wire to the
coil. |
| Reading should be approximately 200 volts or
more. |
|
| |
| 7)
Simplified bench test: |
|
|