Page 1
INSTALLATION INSTRUCTIONS
1
2
SIG.
+12V
LAMP
GND
GND
LAMP
2511-892
OUT
+12V
1
122
1 2
4 CYL. / 2 PULSE
6 CYL. / 3 PULSE 8 CYL. / 4 PULSE
DN DN
DN UP UP UP
31/8" ELECTRIC TACHOMETER
2650-1183
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 service@autometer.com.
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 switch hole on the back of the tachometer.
Use an unwound paper clip to move each of the two
switches to the proper cylinder selection according to
the diagram illustration on the right. Apply included label
over switch 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 positio n.
Figure A.
8 CYL. (4 pulse)- Both switches up.
6 CYL. (3 pulse)- Switch One down, Switch Two up.
4 CYL. (2 pulse)- Both switches down.
QUESTIONS:
Figure A.
Unwound
Paper Clip
SWITCH HOLE
If you are unsure of your vehicle’s pulse(s) per revolution or specific
calibration requirements, contact Auto Meter Technical Service Dept. at
(815) 899-0801, or go to www.autometer.com/hp/techtips for information.
Front Mounting
1. C an be m ou nted i n a 35⁄ 32” dia. h ole in the
dashboard. (Take care that hole is not cut too large.)
Can also be mounted in a standard aftermarket
street rod panel.
2. Drill a 3⁄8 ” dia. hol e in the f irewall wher e the
tachome ter wires will be routed. Place rubber
grommet in hole and route the connector wires
through to the engine compartment.
3. Connect the tachometer wires as shown below.
4. Secure the tachometer in the dashboard using the
bracket, thumbnuts and lockwashers provided.
Inc orrect ho okup w ill da mage
ta chome ter and void warranty.
Please read these instructions.
WARNING
3.300"
31⁄8" SIZE SHOWN
1
2
⁄ 4"
3.145" dia.
(3 9⁄64" ref.)
Page 2
12V BA
TTER
Y
COIL
- OR -
1
1
2
2
1 2
4 CYL. / 2 PULSE
6 CYL. / 3 PULSE 8 CYL. / 4 PULSE
DN DN
DN UP UP UP
+
_
SIG.
+12V
LAMP
GND
GND
LAMP
2511-892
OUT
+12V
NOTE: If your tachometer does not function correctly when connecting the green wire to an aftermarket ignition box, such as MSD, etc., it may become necessary to use
an aftermarket tachometer adapter such as MSD’s 8910 or 8920. Contact MSD for further details on their adapters.
WARNING
Inc orrect ho okup w ill da mage
ta chome ter and void warranty.
Wiring
Please read these instructions.
To ground (-) negative
Light wire connects to dash lighting
circuit or 12 Volt (+)
Fuse
GROMMET
IN FIREWALL
Apply included label over switch hole
12V IGNITION
SWITCH
TACH
TERMINAL
EARLY MODEL IGNITION
CAUTION!
As a safety precaution, the +12 V terminal of this product should be fused
before connecting it to the 12V ignition switch. We recommend using a 4 Amp,
3 AG fast-acting type cartridge fuse (Littlefuse® #312 004 or an equivalent).
Warranty will be void if connected to coil
when using an aftermarket ignition box
such as, but not limited to products from
the following manufacturers: MSD, Crane,
ELECTRONIC IGNITION
WARNING
Jacobs, Mallory, Holley, Etc.. Prior to
installation of your tachometer, check
with the ignition box manufacturer for
recommended tachometer signal location.
For service send your product to Auto Meter in a well packed shipping carton. Please include a note explaining what the problem is along with your phone number. Please specify when you
need the product back. If you need it back immediately mark the outside of the box “RUSH REPAIR,” and Auto Meter will service product within two days after receiving it. ($10.00 charge will be
added to the cost of “RUSH REPAIR.”) If you are sending product back for Warranty adjustment, you must include a copy (or original) of your sales receipt from the place of purchase.
12 MONTH LIMITED WARRANTY
Auto Meter Products, Inc. warrants to the consumer that all Auto Meter High Performance products will be free from defects in material and workmanship for a period of twelve (12) months from date of the
original purchase. Products that fail within this 12 month warranty period will be repaired or replaced at Auto Meter’s option to the consumer, when it is determined by Auto Meter Products, Inc. that the product
failed due to defects in material or workmanship. This warranty is limited to the repair or replacement of parts in the Auto Meter instruments. In no event shall this warranty exceed the original purchase price of
the Auto Meter instruments nor shall Auto Meter Products, Inc. be responsible for special, incidental or consequential damages or costs incurred due to the failure of this product. Warranty claims to Auto Meter
must be transportation prepaid and accompanied with dated proof of purchase. This warranty applies only to the original purchaser of product and is non-transferable. All implied warranties shall be limited in
duration to the said 12 month warranty period. Breaking the instrument seal, improper use or installation, accident, water damage, abuse, unauthorized repairs or alterations voids this warranty. Auto Meter
Products, Inc. disclaims any liability for consequential damages due to breach of any written or implied warranty on all products manufactured by Auto Meter.
FOR SERVICE SEND TO: AUTO METER PRODUCTS, INC. 413 W. Elm St., Sycamore, IL 60178 USA (815) 899-0801
© 2006 Auto Meter Products, Inc.
Email us at service@autometer.com
SERVICE
2650-1183 7/18/06
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