[Healeys] Tach rebuild

[Len and/or Marge Hartnett]

Considering all the different responses to the "Tach rebuild" question from 
John, it's like asking, "what's the best....".  Everyone has their own 
experiences.  I guess I was one of the lucky ones.  I installed my Pertronix 
in July of 2000.  There was no effect on the tachometer.  In June of 2004, 
my tach started reading incorrectly.  Based upon an article by Frank 
Filangeri (source unknown), "BJ8 Tachometer Reads High", I swapped out the 
capacitor marked ".2 uf" drilled a hole in the back of the case to access 
the adjustable pot on the back of the circuit board, and after reinstalling 
the tach in the dashboard, calibrated it to match an external tachometer. 
It has been running accurately ever since.

Lucky Len
(The Other) Len
Fairfield, CA, USA
1967 AH 3000 MkIII, HBJ8L39031
        221,444 miles


----- Original Message ----- 
From: "John OBrien" <banjojohn at cox.net>
To: "Healeys" <healeys at autox.team.net>
Sent: Tuesday, November 24, 2020 12:23 PM
Subject: [Healeys] Tach rebuild


> Hi Listers:
>
> The tach on my BJ8 does not show the correct RPMs. On a cool morning it 
> shows what I believe is fairly close to the right numbers, but as the car 
> warm, or the day warms, it reads higher and higher for the same speed. I 
> know it is not the clutch slipping. I saw some articles in Healey Marque 
> magazine showing how to rebuild and test them, but it requires a 
> oscilloscope and some other specialized equipment I don't have, so I'm 
> wondering if you guys have a recommendation for someone that might rebuild 
> them.
>
> I imagine there is also some info in the archives, but my antivirus 
> software flags the archive site as a malicious website and doesn't want to 
> let me access it.
>
> Thanks for any info.
>
> John O'Brien
>
> '61 bugeye (Lucy)
>
> '65 BJ8 (Madelyn)
>
>
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