Yes. That is about right. My 8/70 S still has its 8TR but the mini K one died in the '80s and was replaced by the big black 4TR.

What a coincidence.

By sheer fluke today I came across a Parts Amendment Advice dated June 1972 for the Mini Clubman parts catalogue (PUB1052). It announces the change from the Lucas 15AC alternator to the 15ACR (part 62921219A) across the Clubman range.

The Car Number change points for the three models are:

YG2S6 - 2017
YG2S7 - 3053
YG2S8 - 1014

In the case of the Clubman GT (YG2S8) this equates to a February 1972 delivery car.

On the same PAA is the introduction of reversing lights, which is car 1002 for the Clubman GT. So the first 501 Clubman GT's produced did not have reversing lights according to this document.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Just be careful with these 15AC externally regulated units, if they are fitted with the correct rectifier one of the large spade terminals is a NEGATIVE. So if you have two large brown Positive wires on your Alternator wiring this will cause a BBQ. See + and - Markings on plastic cover.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

Both those larger spade terminals appear to be attached to either side of the same plate in the diode pack. Won't they both be outputs (+)?
Bill

At least it confirms my GT 1017

I have an alternator question to bung on the end here...

My alternator is marked as "Lucas Australia 15AC" which is dated 11/72. But, it has the part number above listed by Doug as the 15ACR (62921219A). The terminals on the back of it are: +, Aux +, IND, F (but I don't think it has an F spade) . Is someone able to confirm if this one is internally regulated?

(I have changed the black wire to the IND terminal since the photo and all is working fine..)


This brings me onto the next issue. If the alternator is internally regulated can I ditch the external regulator and make this look much tidier?


(The swap was done before I got the car)

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If it is indeed internally regulated you can ditch the regulator (I think this is obvious?!?). It looks like it needs tidying up.
If it works fine with nothing connected to the field (F) or no field terminal it must have an internal regulator..

That regulator is actually the one that is fitted for a generator, not an alternator, so is certainly redundant.

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Don't listen to what I am saying... just understand what I mean.

Some people leave the regulator body there and turn it into a junction box.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

That's good news then. I was looking for a little bit of room to fit a headlight relay so that might be a good spot. The wiring there is also horrendous and I'd love to fix it up.

I can leave the old regulator in the just-in-case-box of original parts not to be used again..

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Doug, I think the publication is wrong on this one for the 15ACR introduction. The service bulletin quotes the engine numbers and by some freak of nature the car numbers quoted in the publication exactly match the engine numbers. What do you think?

Well spotted. I think the parts amendment advice is correct in using car numbers. This document holds one of, if not the primary resource for car production changes that feed to other parts of BMC. I reckon whoever put together the Service Bulletin just used engine number prefixes instead of vehicle ID prefixes when adding the change point reference numbers.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Ok. I was thinking it was the other way around. Especially when they are also quoting YG2S8 1415 in June 1972 but that car was built 6 months later in Dec 1972.

Looking at the GT Register the number 1014 appears against a car number in Feb 1972, just before the Sales Bulletin was issued. Engine numbers in the 1200 series with that number were a few months earlier. In any case if it was the engine number to be referenced then the 1205 prefix engine number change point is missing.

The Bulletin went to Dealers and I think it would be the car number that would be their primary reference for sales and parts & accessories.

Engines weren't fitted to cars in numerical sequence but car numbering was sequential so it seems sensible to quote the car number rather than the engine number. In this case, all cars from 1014 had the new alternator fitted.

Don't know for sure but that's how I came up with my theory.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

By Coincidence, I had to replace my alternator yesterday.
The one I pulled from the car is a Lucas 18ACR which isn't included in the above discussion.

Any ideas what it was originally from?