Joe,
As it turns out it is an amazing coincidence. I have three GT6 tachometers
and all three were bouncing all over the place. I pulled the distributor
and removed the drive gear. Tachometer drive gear was pristine. I have two
Spitfires in different stages of restoration, so I removed one of their
tachometers and hooked it up to the GT6 cable under the bonnet. Guess
what?.......it worked fine.
All three GT6 tachometers must need to be repaired/calibrated. Have you
ever had this done?
Mike Ross
'67 Spitfire (soon to be a Spit 6)
'66 Spitfire
'69 GT6 (parts car)
'70 GT6
----- Original Message -----
From: "Joe Curry" <spitlist@gte.net>
To: "Mike Ross" <mikeross@Prodigy.net>
Cc: "spitfires@autox.team" <spitfires@autox.team.net>
Sent: Thursday, July 27, 2000 5:44 PM
Subject: Re: Tachometer erratic
> Mike,
> If you replaced the tach and the cable and still get the same problem
(unless you have an amazing coincidence) it would stand to reason
> that the only thing left to cause the problem is the drive gear in the
distributor. It is made of nylon and if it has been damaged on
> one of the teeth, it could very well caust the problem.
>
> Joe
>
> Mike Ross wrote:
> >
> > Fellow listers,
> >
> > I bought a new tachometer cable for my GT6 thinking that was why the
> > tachometer needle swings wildly back and forth. Alas that wasn't the
> > problem. It still bounces all around even with a new cable. I've got a
> > spare tach and it does it with that one too.
> >
> > Is there anything special that needs to be done to connect the cable
from
> > the distributor to the tach? Could there be something wrong with the
gear
> > in the distributor?
> >
> > Any help would be greatly appreciated.
> >
> > Mike Ross
> > '67 Spitfire (soon to be a Spit 6)
> > '66 Spitfire
> > '69 GT6 (parts car)
> > '70 GT6
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