Auto Meter 880246 User Manual

INSTALLATION INSTRUCTIONS

1

122

1 2

4 CYL. / 2 PULSE

6 CYL. / 3 PULSE 8 CYL. / 4 PULSE

UP DN

DN UP UP UP

IN-DASH ELECRIC TACHOMETER

2650-1138

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 [e-mail].

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 31/8" and 33/8" 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

QUESTIONS:

Figure A

(Angle view through access hole)

Access switch
through
access hole.

If you are unsure of your vehicle’s pulse(s) per revolution or specic

calibration requirements, contact Auto Meter’s Service Dept. at
[phone], 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.

Switch is not visible from
from this angle, shown for
location only.

33/8" SIZE SHOWN

Note:

This tachometer operates on most early
model ignitions, factory electronic and high
performance electronic racing ignitions.

Mounting

12V

BA

TTER

Y

COIL

- OR -

+

_

1. Mount a 31/8" tachometer in a 35/32" dia. hole, a 33/8" tachometer in a 33/8" dia. hole and a 5" tachometer
in a 45/8" dia. hole. Be careful not to cut the hole too large.

2. Cut a 3/8" dia. hole in the rewall for the tachometer wires. Place a rubber grommet in the hole and route
the wires through the grommet to the engine compartment.

3. Connect the tachometer wires as shown in the wiring sections.

4. Secure the tachometer to the dashboard using the provided bracket and hardware.

31/8" Models 33/8" Models

2¼"

35/16"

39/64"

311/32"

Wiring

FUSE

21/8"

3¾"

12V IGNITION

SWITCH

419/32"

5" Models

23/8"

415/16"

GROMMET

IN FIREWALL

LIGHT WIRE ­DASH
LIGHTING
CIRCUIT OR

12VOLT (+)

EARLY

MODEL

IGNITION

WARNING

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, Jacobs, Mallory, Holley, Etc.. Prior to installation
of your tachometer, check with the ignition box manu-

facturer 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.

Auto Meter Products, Inc. warrants to the consumer that this product will be free from defects in material and workmanship for a period of twelve (12) months from date of the original purchase. Products that
fall 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 transpotation 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.

12 MONTH LIMITED WARRANTY

SERVICE

As a safety precaution, the 12V terminal of this
product should be fused before connecting it
to the 12V ignition switch. We recommend
using a 1 Amp, 3AG fast-acting type cartridge
fuse (Littlefuse® #312 001 or an equivalent).

ELECTRONIC

IGNIITION

CAUTION!!!

TACH
TERMINAL

FOR SERVICE SEND TO: AUTO METER PRODUCTS, INC. 413 W. Elm St., Sycamore, IL 60178 [phone]

The “Super Bezel” is a registered trademark of Auto Meter Products, Inc.

For Email: [e-mail]

© 2006 Auto Meter Products. Inc. 2650-1138 5/10/06