How to install an automotive tachometer into an outboard engineYou've probably clicked on this link to tell me that you can't do it. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. My motor has a 12 pole stator, creating 6 pulses per revolution. Check with your local dealer.
Also, calculate the pulley ratio from crankshaft to alternator.
An outboard motor is an independent unit, mounted on the outside of the boat, Tachometer installation consists of placement and properly connecting the wires. Buy products related to outboard tachometer products and see what customers say tach that I could not find a good installation spot for with this digital tach that I mounted in the "Good hour meter for outboard boat motor" - by Justin DeVoe. CAUTION: Disconnect the battery during installation. Tighten nuts on the backclamp only slightly more than you can tighten with your fingers. Six inch- pounds of.
Match number of poles and pulley ratio to the appropriate switch position setting on the chart below. NOTE: Tachometers are factory calibrated for several combinations of poles and pulley ratios, but in almost all cases you will need a Portable Master Shop Tachometer for initial calibration.
Detailed calibration and adjustment procedures are documented in instructions included with Teleflex tachometers. As each gear tooth passes the sender, a pulse signal is generated.
Works with 90 to teeth on gear. The Signaflex sender mounts in place of a tachometer cable. Select the drive tang that fits the engagement hole. Note: Teleflex has not tested the various aftermarket bolt-on ignition systems and makes no statement as to their compatibility with our tachometers.
If you have such a system, contact the ignition system manufacturer and ask if they have determined compatibility. These engine models include:. Rotary selector switch on rear of tachometer must be set to number of pulses from alternator per engine revolution.Installing and calibrating an outboard tachometer
Note: Engine designs are subject to change. Data above is based on the latest information available at the time of publication. Teleflex assumes no responsibility for its correctness or the misapplication of its products. Wire colors vary with engine manufacturers.
However, most engines use some form of yellow for the two wires from the stator to the rectifier. This wire may some times be used for the tachometer sender connection with favorable results.
In many domestic engine installations, the stator wires result in a gray wire routed to or near the throttle control where it can be used for the tachometer signal. Faria Chesapeake Series Gauges. Faria Coral Series Gauges.
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Outboard Tachometer Installation
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New customer? Start here. Item s in your cart: There are no items in your cart. All Categories. Related Products. There are no items in your cart. How Tos. JD Pro. Troubleshooting Teleflex Tachometer Gauges. Check all wire connections to see that they're tight and not corroded. When tachometer is first turned on, pointer must go to zero 50 RPM.
Tachometer hook up outboard motor
If not, check connections if OK, tachometer is probably faulty. Arrow on rotary selector switch must be pointed directly at setting or the tachometer will go to full scale. Some alternators do not have output terminal for tachometer signal.
A local alternator repair shop can install a tap from the internal rectifier to facilitate a tachometer signal from the alternator. Rotate tach selector switch to the letter that puts the tach closest to actual RPM.
Final calibration adjustment requires a Remote Master Tachometer. Previous Next. Tags: None. June 2nd,PM. Re: how to hook up a tach to johnson motor What model engine do you have? Comment Post Cancel. Look below the key -- you will find a three terminal plug. That's where the tach gets connected. You'll need the tach harness or make your own using terminals that you can get at Radio Shack.
Re: how to hook up a tach to johnson motor ok, no wires under the key. Re: how to hook up a tach to johnson motor i have a johnson hp. June 3rd,AM.
Automobile Tachometer on an Outboard: You've probably clicked on this link to tell me I didn't want to have to order a tach for my motor, a 65hp 3cylinder Evinrude. Then you can hook up to the coil as shown in the tachs instructions. ok, so i just recently switched motors on my boat. i had a merc now i have johnson. the guy gave me a tach to put on but i had one on before.
Re: how to hook up a tach to johnson motor The 73 johnsons do not have the 3-wire setup for the tach. You should find a cutoff grey wire coiled up inside the control box. This is the tach signal wire. Splice it and run it to the "S" terminal on the tach. You will also need to get postive and negative from your dash to run the tach. Any new speedo should come with 23' of hose and a pitot which will mount to the back of the boat. Re: how to hook up a tach to johnson motor would you happen to have a diagram of what goes where?
Re: how to hook up a tach to johnson motor. Originally posted by emdsapmgr View Post.