"I removed my tachometer the o
"I removed my tachometer the other day because it didn't work, at all. Unfortunately I failed to label the wires when I took them off. Black, Grey, and Purple wires were attached to it.
The new teleflex tachometer (in a MARPAC branded package) said that it should "go to zero" when the power is turned on.
I connected the black to ground, and I've tried the other two wires both ways (coil and send) and neither causes the tach to "go to zero" when I turn on the ignition.
Now, I haven't actually run the engine yet (doing so this evening) so who knows what'll happen.
But I couldn't find a valid wiring diagram that describes the purple and gray wires.
My boat is a 1985 Glastream Cutlass 172 with a MCM140 Mercruiser engine and an alpha one stern drive."
"I removed my tachometer the other day because it didn't work, at all. Unfortunately I failed to label the wires when I took them off. Black, Grey, and Purple wires were attached to it.
The new teleflex tachometer (in a MARPAC branded package) said that it should "go to zero" when the power is turned on.
I connected the black to ground, and I've tried the other two wires both ways (coil and send) and neither causes the tach to "go to zero" when I turn on the ignition.
Now, I haven't actually run the engine yet (doing so this evening) so who knows what'll happen.
But I couldn't find a valid wiring diagram that describes the purple and gray wires.
My boat is a 1985 Glastream Cutlass 172 with a MCM140 Mercruiser engine and an alpha one stern drive."