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1275LS
PostPosted: Sat Nov 05, 2016 4:57 pm 
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Hi all.

Got in the car today and before i had the key in or started I noticed the tacho sitting on 1500 rpm.

Startup went to 2000.

It is a 1275ls with the standard cluster.

Ideas?

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1275LS - July 78 - XNFAD18Y/102918


Last edited by 1275LS on Sat Nov 12, 2016 10:09 pm, edited 1 time in total.

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9YaTaH
PostPosted: Sun Nov 06, 2016 8:55 am 
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Voltage stabiliser?

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Jonnoh
PostPosted: Mon Nov 07, 2016 8:43 am 
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I think it's impossible to guess what the problem is.


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Convertible Mini
PostPosted: Mon Nov 07, 2016 9:25 am 
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10 out of 10 points to Jonnoh .... Tacho works with full 12 volts from Ignition not from stabilizer 10 Volt supply. I wonder why people who are not sure what they are saying still put their Guess in. It confuses those who are trying to fix something themselves and could be potentially damaging. Sorry I had to say it but someone had to. If my comment is not liked please feel free to delete it.

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gtogreen1969
PostPosted: Mon Nov 07, 2016 10:26 am 
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I had a a sticking tacho like that but it was only the needle rubbing on the face. Just had to bend it up a bit to clear.
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GundyGuy
PostPosted: Mon Nov 07, 2016 10:53 am 
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I think it's mechanical
As in the needle isn't returning to zero
Have to read the question properly

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Stev0
PostPosted: Mon Nov 07, 2016 11:10 am 
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Yes, possibly the movement itself has had it or it's sticking....pull it apart and have a look. If you rotate it quickly the needle should wobble due to inertia, if it appears stuck it probably is.
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9YaTaH
PostPosted: Mon Nov 07, 2016 1:09 pm 
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Convertible Mini wrote:
10 out of 10 points to Jonnoh .... Tacho works with full 12 volts from Ignition not from stabilizer 10 Volt supply. I wonder why people who are not sure what they are saying still put their Guess in. It confuses those who are trying to fix something themselves and could be potentially damaging. Sorry I had to say it but someone had to. If my comment is not liked please feel free to delete it.


FIIK! :lol:

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Phil 850
PostPosted: Mon Nov 07, 2016 7:40 pm 
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When you turned the engine off, did it go back to 1500.
Try tapping the gauge with your finger.
My mechanical temp gauge only cools down to 50C, but a gentle tap and it goes all the way back to the stop.

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peterb
PostPosted: Mon Nov 07, 2016 7:44 pm 
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Convertible Mini wrote:
I wonder why people who are not sure what they are saying still put their Guess in. It confuses those who are trying to fix something themselves and could be potentially damaging. Sorry

Maybe it's the idle screw to tight. :-) :-) :-)
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jubblies
PostPosted: Mon Nov 07, 2016 9:03 pm 
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Phil 850 wrote:
When you turned the engine off, did it go back to 1500.
Try tapping the gauge with your finger.
My mechanical temp gauge only cools down to 50C, but a gentle tap and it goes all the way back to the stop.

+1. That's what mine does and it's the same era (late '78)
It gets stuck at about 500-1000rpm but then is ok when running. Some times it returns to 0.
I just call it an 'undocumented feature'!

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9YaTaH
PostPosted: Tue Nov 08, 2016 7:06 am 
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jubblies wrote:
+1. That's what mine does and it's the same era (late '78)
It gets stuck at about 500-1000rpm but then is ok when running. Some times it returns to 0.
I just call it an 'undocumented feature!


Maybe you should carry out an Expanded Gage (*) R&R study on your speedo Jubblies :?:

Further reading here:

http://support.minitab.com/en-us/minita ... r-r-study/

(*) http://www.dictionary.com/browse/gage

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1275LS
PostPosted: Wed Nov 09, 2016 6:05 am 
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Convertible Mini wrote:
10 out of 10 points to Jonnoh .... Tacho works with full 12 volts from Ignition not from stabilizer 10 Volt supply. I wonder why people who are not sure what they are saying still put their Guess in. It confuses those who are trying to fix something themselves and could be potentially damaging. Sorry I had to say it but someone had to. If my comment is not liked please feel free to delete it.


Thanks Tony. No problems from me.

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Alec
1275LS - July 78 - XNFAD18Y/102918
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1275LS
PostPosted: Sat Nov 12, 2016 10:13 pm 
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Ok so got in the car tonight and gave the tacho a gentle bump on the side. I could hear a spring or something inside twang or bounce a bit and the needle just drifted its way back to zero.

Started her up and hey presto, idle! revs up and down and the needle follows nicely. I reckon it just got itself out of sorts over a speed bump or something.

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Alec
1275LS - July 78 - XNFAD18Y/102918
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Minicooper4me
PostPosted: Sun Nov 13, 2016 8:05 am 
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Dare you to tap it again !
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