[Healeys] Healey 100-4/6 Tach

[Bob Haskell]

Bob,

Have you tried driving the tach with a variable speed drill, from the 
distributor end of the cable?

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar

On 11/19/22 11:46 PM, Bob Spidell wrote:
> Tried that. Will try rerouting the sleeve.
>
> I'm pretty familiar with the speedos, having a drawerful and actually 
> getting a couple to work halfway decent. A cracked odo or tripmeter 
> drive gear will give a fixed-interval bounce based on speed, and the 
> cable loading-up and unloading is also fairly rhythmic, but my tach 
> just goes crazy. It seems like the needle needs to be damped somehow.
>
>
>
> On 11/19/2022 2:38 PM, Patrick & Caroline Quinn wrote:
>> G'day
>>
>> When a mechanical tach or speedo needle bounces, it's generally due 
>> to the drive cable has become too flexible due to age.
>>
>> A new cable should fix it. You don't necessarily need a new outer, 
>> just the internal cable.
>>
>> Hoo Roo
>>
>> Patrick Quinn
>> Blue Mountains, Australia
>>
>> -----Original Message-----
>> From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Bob Spidell
>> Sent: Sunday, 20 November 2022 8:20 AM
>> To: Healeys <healeys at autox.team.net>
>> Subject: [Healeys] Healey 100-4/6 Tach
>>
>> Specific to cars with mechanical tachometers:
>>
>> The tach on my 100 bounces around off-idle (OK at idle). Any one been 
>> able to cure this problem? Anything inside to damp the bounce that 
>> can be adjusted?
>>
>>    I'm not interested in sending to West Valley or other repair shop 
>> (at least not yet).
>>
>> TIA
>>
>
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