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ncbugeye project this weekend

The 41217A indicates a 25D4, the 3869 indicates the manufacturing date as the 38th week of 1969, which is somewhere around September. If you go here you can see the advance data for that dizzy. The block (12V) is from a north american round wheel arch Midget.
 
Chris, thanks for looking that up.

So... didn't the 948 run the DM2 distributor? Does it use the same points as the 25D4?

If the points fit, follow Jack's steps above on fitting the points. Pay particular attention to three things:
1) Make sure the flex-braid is in place between the breaker plate and the dizzy housing. It needs to be intact and flexible to complete the ground circuit and allow the vacuum advance to do its job.
2) Make very sure you fit the little nylon/plastic spacer washers on the spring arm of the points. Failure to properly fit those spacers shorts out the moving arm of the points... effectively creating a permanently closed kill switch... no spark.
3) When fitting the condenser, make sure its little forked spade lug on the wire is not touching the breaker plate or fixed portion of the points. As above, that will create a permanently closed kill switch.
 
Very easy to test the workings with an ohm meter. I did. I don't trust anything I do.
 
Sorry, Chris, what's RWA?
 
I was able to obtain a set of Lucas points and condenser locally, but not the "terminal and lead". The one I have is for a 948 distributor and does not fit the 1275. I called VB and they are shipping me one but now I won't probably get it until after Christmas, so ncbugeye will have to sit and doze for a couple of weeks.

I really appreciate the information, my memories are coming back...
 
Sorry, fixed it. RWA is round wheel arch, SWA is square wheel arch. It just refers to the shape of the rear wheel opening.
 
And just what is a terminal and lead? For all practical purposes 948 and 1275 dizzy are the same.
 
Chris... where are you in Raleigh and which part are you ordering from VB?
 
I live in North Raleigh just inside I-540 off Six Forks.

In the Moss Catalog on page 64 it's the part numbered 6. It's the wire and the plastic terminal itself that you attach the wire to from the harness.

In the 948 distrbutor there is a two-pronged part of the baseplate bent at right angles, into which the terminal slots. In the 1275 distributor the two prongs are deleted and the terminal slides directly into the cutout in the distributor body.
 
Chris and Doug,
If you need any Sprite/Midget parts in Raleigh check with Carl Cason. He has been racing a Sprite for 20 years and runs a Miata and MG repair shop on Hillsborough St. just past the NC Fairgrounds going toward Cary. Carl is a "go to" person for Spridgit knowledge.
 
What is his shop called?
 
Yep that part and vacume unit are different, sigh.
 
I know Carl. His family (parents) lived just around the corner from me when I was living with my parents. There was always a large collection of MBGs and Midgets parked at the house. The last time I saw him was well over twenty years ago (I remember buying some used SU pump parts). I have spoken to him on the phone a couple of years back. He's a nice guy with a large collection of parts.

Chris, I don't have a printed catalog from Moss so I'm going by their online stuff. Are you talking about their parts 153-600 and -640 that they call "Terminal and Lead"? If so, I probably have one that fits a 1275. If that won't help, I've made repairs using the high-flex copper braid used for electric motor brushes. Do you have a broken part worth fixing? Actually I've only used motor brush braid for the ground wire but it could be used on the terminal you're talking about if after improvising some insulation to cover it.
 
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