No, the tach requires internal modifications. There is a procedure in the
Moss catalog, although it didn't work for me, doubtless due to my lack of
soldering skill. Various speedometer shops will do the conversion for
you.
Maffei Andrew P SSgt 27 LG/LGQPT had this to say:
>Someone did that to my 66B, I think it was when they swapped the generator
>to an alternator. now I don't really know how it's done, but the only
>problem now is the original tach will not work at all, and I have tried.
>if anyone out there knows how to fix this please let me know ( and yes I did
>try swapping the wires at the coil)
>
>> -----Original Message-----
>> From: Brian Warmuth [SMTP:warmuthb@WLSC.WVNET.EDU]
>> Sent: Friday, June 23, 2000 6:28 AM
>> To: mgs@autox.team.net
>> Subject: Pos to neg
>>
>> I suppose this topic has been covered before and there are probably some
>> web-pages which deal with the specifics of the process, but I would like
>> to convert my MGA from the positive ground to negative ground
>> arrangement. I believe it is fairly easily done, but does anybody have
>> a step-by-step? It has the original fuel pump, however I have a rebuilt
>> one (converted to operate on negative ground) to install. Since the car
>> has no "electrical" gauge do you just switch the battery ground, switch
>> the coil wires, and re-polarize the generator?
>>
>> Mucho TIA!
>> Brian Warmuth
>> 52 TD (Rhd), 58 ZB, 59 MGA (1500), 60 Farina Magnette
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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