Circuit diagram of generation one and two smiths tachometer as used tachometer wiring excerpt of gt diagram tach wiring is. Attach the base using screws provided or use a pop rivet tool.

Msd Installation
Rpm gauge wiring diagram. Protected fused wire from battery andor protected 12 volt to trim panel control. Make sure this switch is set to the number of cylinders for your engine. By way of a loop of wire in series with the ignition coil attached to the rear of the case. A wiring diagram is commonly made use of to fix problems as well as to earn sure that all the connections have been made which every little thing exists. Wire cutters wire strippers automotive diagnostic tool used for finding tachometer wire ratchet and sockets screwdriver drill. At the top left of the diagram we see the cylinder selector switch.
Attach the wire from pin 3 to a ground negative source. Use an existing hole in the firewall to pass the black and green wires through to the engine bay. Cut out a notch in this grommet to pass the wires through or drill a new hole for the wires to be sent. Beginning with the tachometer fig. The tachometer is configured at the factory for 4 ppr. Mine was salvaged from my old truck 3m quick splice connectors 14 18 gauge 410 walmart tools.
Temperature switch to warning horn andor. Fuel sender to gauge. Apply power to the tachometer by attaching the power input wire of the tachometer to the 12 volt dashboard lighting supply of the car. Tachometer can be purchased from most any auto parts store for as low as 33. Installation images shown may be different from your actual model. Provide power to the tachometer backlighting.
Black yellow stripe. Attach the tachometer backlighting wire. 1996 evinrude 40hp parts used in this test. The wiring basics of connecting a tachometer rpm gauge to an outboard motor. Un fused wire from battery. Wire to a junction and attach the wire from pin 4 at this junction ie.
6 the special design of the tachometer base allows for a variety of mounting possibilities. With the tachometer and wiring in place finishing the job is easy. Shorting or stop circuit. Outboard engine wiring series links. Locate the 12 volt switched dash lighting supply for the dashboard on the car fuse box. Connect a wire from pin 5 to a constant 12 or 24 volt source.
A photographic diagram would show more detail of the physical appearance whereas a wiring diagram makes use of an extra symbolic notation to emphasize interconnections over physical look. Outboard motor control wiring part 1. Existing holes will have a rubber grommet to protect the wiring. Refer to diagram d. Most vendors will use one tachometer head to cover a variety of engines. 1 here shows the back of a typical gauge.
1 3 4 1 8 note. Ignition switch to 12 volt positive. Red purple stripe. One such source can always be found where the battery is attached to the metal frame of the vehicle.