Auto Meter 880246 - Manual

INSTALLATION INSTRUCTIONS
IN-DASH ELECRIC TACHOMETER
2650-1138
QUESTIONS:
If after completely reading these instructions you have questions regarding the operation or installation of your instrument(s),
please contact Auto Meter Technical Service at 815-899-0801.
You may also email us at [email protected].
Additional information can also be found at http://www.autometer.com/tech_faq.aspx
Calibration
IMPORTANT: This tachometer is factory calibrated to
operate on 8 cylinder engines. For 4 or
6 cylinder engines, it is necessary to
make the proper adjustments to adapt
this tachometer to your cylinder range.
Locate the black plastic plug covering the switch access hole.
The hole location is shown for 3
1 /
8
" and 3 3 /
8
" sizes. The 5" size
has a smaller access hole located in the upper left-hand portion
of the case. Remove the plastic plug covering the access hole.
use a small screwdriver or an unwound paper clip to change the
switch settings. Move each of the two switches to the proper
cylinder selection according to the diagram illustrated on the
right. Reinstall the plastic plug/cap into the access hole.
NOTE: This tachometer has an air core meter. With power off,
It is normal for the pointer to leave zero. When power
is applied, the pointer will move to the correct position.
Figure A.
4 CYL. - Switch One up, Switch Two down
6 CYL. - Switch One down, Switch Two up
8 CYL. - Both switches up
If you are unsure of your vehicle’s pulse(s) per revolution or specific
calibration requirements, contact Auto Meter’s Service Dept. at
(815) 899-0801, or go to www.autometer.com/hp/tectips for information.
Lens Cleaning
To prevent scratching the lens when
cleaning, use a mild, soapy solution to
clean. Wipe lightly with a soft cloth.
Note:
This tachometer operates on most early
model ignitions, factory electronic and high
performance electronic racing ignitions.
Switch is not visible from
from this angle, shown for
location only.
Access switch
through
access hole.
(Angle view through access hole)
Figure A
3 3 /
8
" SIZE SHOWN
1 1 2 2 1 2
4 CYL. / 2 PULSE 6 CYL. / 3 PULSE 8 CYL. / 4 PULSE
UP DN DN UP UP UP