
1
1
2
2
12
4 CYL. / 1 PULSE
4 CYL. / 2 PULSE 6 CYL. / 3 PULSE
DN DN
DN UP UP DN
12
8 CYL. / 4 PULSE
UP UP
Lens Cleaning
To prevent scratching the lens when
cleaning, use a mild, soapy solution to
clean. Wipe lightly with a soft cloth.
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.
INSTALLATION INSTRUCTIONS
IN-DASH ELECTRIC TACHOMETER
For Use on Early Model & Most Electronic Ignitions
2650-1165-00 Rev. C
Note:
Locate the access hole on the back of the tachometer.
Move each of the two switches to the proper cylinder
selection according to the diagram illustration on the
right. Use a small screwdriver or an unwound paper
clip to change the switch settings.
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.
8 CYL. (4 pulse)- Both switches up.
6 CYL. (3 pulse)- Switch One up, Switch Two down.
4 CYL. (2 pulse)- Switch One down, Switch Two up.
4 CYL. (1 pulse)- Both switches down.
If you are unsure of your vehicle’s pulse(s) per revolution
or specific calibration requirements, contact Auto Meter
Technical Service Dept. at (866) 248-6357, or go to
www.autometer.com/hp/techtips for information.
1
2
3
3
⁄8" SIZE SHOWN
Figure A.
This tachometer operates on most early
model ignitions, factory electronic and high
performance electronic racing ignitions.
Access switch
through
access hole.
(Angle view through access hole)
Switch may not be
visible from this angle,
shown for location only.
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 866-248-6357.
Additional information can also be found at http://www.autometer.com/tech_faq.aspx
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