Stack st8130 series - Returned Goods Procedure; Returned Goods Form Process

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No. Symptom Possible Cause Remedy Notes
20 No RPM
speed reading
Incorrect wiring Check the
connection of the
engine speed wire
to the ignition
system (or sensor,
if used)
See instructions
supplied in this
manual. If
connected directly
to the coil, check
that it is to the
switched low
tension side
(usually the
negative side).
21 Displayed
RPM value too
high or too low
by a constant
%-age
amount.
System configured
with wrong number
of engine cylinders.
Reconfigure
system to correct
number of
cylinders.
Ignition systems
may either:
-produce "waste"
sparks giving
double the number
of cylinders per
revolution
Ignition system
pulses per
revolution not same
as number of
cylinders
Reconfigure
system to correct
number of pulses
per revolution.
-use multiple coils
where each
additional coil gives
proportionately
fewer pulses per
revolution.
22 Tachometer
reading erratic,
pointer jumps
high or low
Incorrect wiring Reconnect the
tachometer as
specified in this
manual
Signal from ignition
system or coil is
noisy
Condition the ES
signal by placing a
resistor in line with
the ES wire
Resistor values:
10K ohms for
dedicated tacho
output; 47K Ohms
for coil connection
(Non-CDI); 100K
Ohms for coil
connection (CDI).
Resistors 1/2W 5%
350v
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