I'm sure somebody has dealt with this as well.. I have an old WesTach in my Packard that always sticks around 2000rpm. It works fine up until it reaches 2000, then wont read any higher (I've checked it with my dwell/tach bringing the motor up to 3500 or so) and when I let off it stays at 2000 until I tap the glass and then it drops down... I've read somewhere if I want to take it apart and lube it up NOT to use an oil-based lube... why is this? Will Deep Creep or WD-40 or the like damage the internals? I'm not an electronics genius, but I don't see how it would hurt... Any advice is greatly appreciated!
Not sure about fixing it but WD-40 is not a lubricant. Its function in life is to displace water. Thats why they call it WD.
Use silicone spray .......petrol based products will evently dry out and clog the shaft movement ....i have fixed three tachs with silicone....but this is no guarantee that it will work for you....may be other problems kenny
And for some reason fish like it too. The tach in my Corvair always sticks at 1500 until I give it a tap. Now this is what I was told, OK, over time magnetic particles build up inside the needle mechanism and all it needs is a good clean out. Don't know, not sure, just what I've been told.
Thanks for the feedback! I'll take it apart, clean it out real good with electronics cleaner, and use silicone to lube it up. I didn't think of it til just now, but I should go to radio shack or something and get whatever they use to clean computer parts.... I'll let you know how it goes!! Also, from the WD-40 website: "Myth: <nobr>WD-40</nobr> Multi-Use Product is not really a lubricant. Fact: While the “W-D” in <nobr>WD-40</nobr> stands for Water Displacement, <nobr>WD-40</nobr> Multi-Use Product is a unique, special blend of lubricants. The product’s formulation also contains anti-corrosion agents and ingredients for penetration, water displacement and soil removal."
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