[Healeys] Gas Gauge

[Bob Haskell]

Michael,

Do you think the link you added helps from an electrical point of view, 
or from motion/vibration point of view?  I'm thinking the latter - less 
bounce, less movement across the wire wound resistor - less motion of 
the gauge needle.

Cheers,

Bob Haskell
AHCA 3000 Mk I registrar
http://www.ciahc.org/registry_3000mk1.php

On 08/26/2015 07:27 AM, Michael Salter wrote:
> Actually a Healey fuel gauge can be made to work very accurately. The
> gauge in my 100 is as steady as a rock and a very accurate indicator of
> the tank contents.
> The only change I made was to add a tiny connecting link between the
> float arm and the body of the gauge sender as in the attached pic.
> Prior to doing this I had no idea that a gauge of this type could work
> so well.
>
> Michael S
> BN1 #174
>
> On Wed, Aug 26, 2015 at 1:18 AM, John Spaur <jmsdarch at sbcglobal.net
> <mailto:jmsdarch at sbcglobal.net>> wrote:
>
>     Yes! Will you ever be able to adjust it so it works even remotely
>     close to
>     accurate? I don't think so. There are many posts covering issues
>     with the
>     fuel gauge and tank unit. My gauge and sender were "calibrated" by a
>     couple
>     of shops. The sender is a restored original. Afterwards, it would still
>     stick on full, then when over half a tank was used it would drop to 1/2,
>     then 1/4 and stop.
>
>     I finally calibrated my gauge, with a little more success than the
>     professionals, using the calibration unit in this link:
>     http://mgaguru.com/mgtech/electric/fg_01.htm BTW, I pulled the
>     sender out of
>     the car and calibrated it on the bench. You will need to approximate the
>     high and low limits which are determined by the depth of the petrol
>     tank.
>
>     Be warned, it still is almost fruitless. I believe the problem is
>     caused by
>     how the fuel gauge T and B coils line up with the armature. The fuel
>     gauge
>     needle is connected to the armature and swings based on the magnetic
>     current
>     supplied by the sending unit. Over the years the coils have tilted and
>     cannot be properly aligned with the armature when the nut is
>     tightened. This
>     throws off the adjustment.
>
>     Let me know how it goes.
>
>     Regards,
>
>     John Spaur
>     '62 BT7
>
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> /If you can't fix it with a hammer, you've got an electrical problem./
>
>
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