A local alternator repair shop can install a tap from the internal rectifier to facilitate a tachometer signal from the alternator. If your boat does not already have a tachometer installed, you're only getting a partial picture of your boat's performance. Hope this is some help to you and good luck. The new Tachometer fit into the old mount without any modifing of the mount. Back off counterclockwise one turn, and secure with the locknut. A system without a distributor will need to connect to the electronic ignition. If the gauge then reads full scale, then the problem was with your sender.
If you get a new tachometer, read the instructions to be sure. I have choices of 2P, 3P, 4P, 5P and 6P. Remove the key or lanyard from the ignition. Also, calculate the pulley ratio from crankshaft to alternator. A second gauge group consists of voltmeters and ammeters, and they work a bit differently.
I have been trying to find the install instructions for the harness, but have had 0 luck so far. Ended up using the 6P position. Small 4 pin connector for the Commander Tachometer. This article has also been viewed 219,383 times. . My harness is a 4 plug, 4 wire, but only two wires are actually equipped with connectors, solid white and black. Engine instruments can get broken down into three broad categories for the purpose of troubleshooting.
Trace those wires to find a suitable attachment point. Reconnect the boat battery to the boat wiring system. Voltmeters will often be found instead of or in addition to ammeters. Any help would be greatly appreciated as this is my first time having such a setup. Compatible with all sterndrive, Verado, OptiMax, and FourStroke® engines 40 hp and above. Tachometers are somewhat unique when it comes to the electrical connections to them.
Matching the tachometer to instruments already installed in the panel also should be considered. Use a screwdriver to unscrew the tachometer from the dashboard it is attached to. Simple mistakes can goof up a tachometer, however, especially in its installation. Gauges, sensors, vessel systems, computer-controlled features — one total package, one high level of control. If you have such a system, contact the ignition system manufacturer and ask if they have determined compatibility. Tried all the others and the idle was over 1000. What do I need to do to make this work.
Those offered on NauticExpo are intended for leisure craft. Use tie straps to neatly bundle any excess hanging wires. Axius® Joystick Piloting for Sterndrives gives you absolute, pinpoint accuracy, stem to stern, regardless of wind, waves, and current. Only work with fuse taps and electrical splices with the battery disconnected. Special Harness Drawings 4 and 6 pin connector for Pilot with Ballast. Re: Help with Tachometer installation Chris 1956, Thank you, I found the gray wire under the dash and spliced into it and the tach sprang to life.
Overtorquing of adjustment will damage gauge mechanism. Directions for mounting typically are provided with new tachometers, as well as any necessary pieces. Thanks for a great product. Brad Re: Help with Tachometer installation The Tachs run off the stator pulses. If not, unplug the pink wire and connect it to a known good ground like your engine block or the negative terminal on your battery. From classic to contemporary, Mercury® has the gauges and displays that fit your boat and your needs.
Works with 90 to 180 teeth on gear. Diesel Alternator tachs read the alternator signal. It is a 4 pin on the control box as is the wiring harness I purchased. Crimp a female blade disconnect onto one end of the remaining red wire and a ring connector to the other end. The harness connector I'm looking at has five wires but only three go to the Tach.