I don't like using it without the tachometer working properly. Use of these gauges and gauge harness requires that the vessel have: 1. Both tachometers are the same brand, Teleflex red international. . I took the cover off the control box and found the gray wire capped and in plain sight.
You should get a reading in one direction, and none at all in the other direction. Refer to the instructions for the mounting hole's required diameter. Since 2009 Tom Lutzenberger has written for various websites, covering topics ranging from finance to automotive history. Remove the key or lanyard from the ignition. I know the wires have never been or came loose while the motor has been running. His education includes a Bachelor of Arts in English and political science from Saint Mary's College and a Master of Business Administration in finance and marketing from California State University, Sacramento.
According to the instructions the sending wire for Erinrude is typically gray. I only used this guy from lack of options. If regulator is ok, the pulse for the tach is provided by it. Supports both digital tach and speed as well as analog gauges. They must be so busy they don't have time for the little things.
So, to answer your question, no, it can't damage anything and will even read correctly, as long as it have the right settings. I've seen some little mods required to adapt the tach with some resistors. Not mounted yet lot of work on the 15'. A diode only conducts in one way. Patch up any minor damage by cleaning the area and wrapping electrical black tape over exposed wires completely.
Connects to 7-wire key switch panel harness. Another test was conducted under readings for 200 rpms A formula, that I no longer have, was then used the calculate the required resistance for other pulse systems. Again, I cannot tell you anything about how the tachometer you have on hand is going to work. There are four unused wires coming off the key start harness: red, green, yellow, and black. Reconnect the repaired wire connector to the tachometer backside.
I know have an extra voltage regulator if anyone needs it. If your control box has a trim switch in the handle, there should be a 3-wire connector pigtail dangling from the handle of the control box. Be certain all wires are connected properly. The mechanic installed a new control box when he changed the motor out. Lift the cable from your battery, move it outside of the battery box and close the lid of the battery box. Remove three screws from the rear of the Control Box and remove back cover plate.
Depress and turn the small selector switch on the back of the tachometer with a screwdriver; this sets the correct pole position for your engine. See Application Chart, Page 4. The instructions said to wrap the wire around the wire leading to the spark plug, however I found that the wire is not stiff enough to keep wrapped securely, so I had some small alligator clips in the shop, I put one on the wire and clipped it to the spark plug wire and it seems to work fine. Nothing is showing dead short like the mechanic told me it did. Features a domed lens to minimize glare in direct sunlight and a fog and scratch resistant coating. Start engine and check for proper operation. You have strange signal on the tach.
See Application Chart on Page 4. There is a small fuse that is located on the engine that can blow if you draw too much current. Keep your tools and safety gear close at hand during the installation of an electronic tachometer. If I remember, it is hold with 2 bolts. For me, the rectifier is a diode full-bridge. Now, connect the black lead of the ohm meter to the red wire.
Use tie wraps to secure the tachometer wires to the body of the car. If anyone has a copy of the wiring diagram for a Yamaha C90 outboard engine, perhaps you could make a scan of it and send it to me. For me this rectifier is not in good shape. It is a European certification mark. The same tachometers can be used for 2-stroke and 4-stroke. A boat owner running a boat without a tachometer handicaps himself significantly.
All data shown is based on latest information available at time of publication. Even though he told me that if there was a problem with anything on the motor that he would make it right. The rectifier of my brand new Black Max was shot by the mechanics because they disconnected the battery. I called Sierra prior to ordering and they assured me it would work. I am trying to find a manual but I am waiting on a few replies to make sure to get the correct manual for my motor.