MG Midget Forum

Tachometer

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Tachometer #1 This topic is about my 1963 MG Midget
RU4U22 Scott F Indianapolis, IN, USA Sign in to contact 1963 MG Midget "TBD"	Topic Creator (OP) Mar 24, 2017 06:11 PM Joined 11 years ago 28 Posts

Do we have to use Smiths Tach when replacing? As you can see, the wires in my loop are fried.

tach.JPG 38.3 KB

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Re: Tachometer #2
smokey1971 Les Boardman St. Petersburg, FL, USA Sign in to contact 1953 MG TD	Mar 24, 2017 06:21 PM Joined 14 years ago 385 Posts

I have one I will sell to you. I can pull the tach out tomorrow and get you some pictures. I have more than one so if your interested, let me know the model numbers on the face of yours and I will check to make sure I have the right one.

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Re: Tachometer #3
threadless Erick M San Antonio, TX, USA Sign in to contact 1959 Austin-Healey Bugeye Sprite	Mar 24, 2017 06:38 PM Joined 10 years ago 162 Posts

It likely wasn't the tach's fault that your main ignition wire is fried. I'd do some careful electrical examination before even considering turning the key on that car, given the function of the white wire.

On the topic of tachs, I retrofitted the guts of a modern tach into the original case and used the original face and needle after some careful modification.

Erick

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Re: Tachometer #4
RU4U22 Scott F Indianapolis, IN, USA Sign in to contact 1963 MG Midget "TBD"	Topic Creator (OP) Mar 24, 2017 07:42 PM Joined 11 years ago 28 Posts

Any chance the tach is still good? It worked 4 years ago when I first bought the car off of my friend, the car was converted to Neg. Ground so I assume the tach was converted too, since it worked. However, when I opened it up, it doesn't look like it was converted, but it definitely doesn't have the "little green wire" to switch with the transistor, pics included
So, if it was not converted, how the heck did it work?

TAch2.JPG 30.1 KB

Tach3.JPG 26.7 KB

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Re: Tachometer #5
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Mar 24, 2017 07:55 PM Top Contributor Joined 12 years ago 14,642 Posts

Converting a tach of that vintage simply means reversing the direction of the white wire loop.

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