Lucas M35A Starter Motor

[cwchrisp]

Chris,

I've just got round to checking the starter motor belonging to my late 1934 AVH Van (essentially the same as a late RP saloon but with a van body). The 6v starter is a Lucas M35A  BN 11 (the BN signifies it's an Austin part) Part No. 250021  10  6 (this shows it was manufactured in October 1936 so not original to the engine crankcase). Mine definitely has the NON copper tailed bushes part number 250055. If you have a copy of John Platts 1983 The Austin Seven Centre Catalogue, there's an exploded diagram of the Lucas starter on page 153 showing the NON copper tailed brushes attached to the two pivoting carriers by a machine screw through the bush - each of the copper connection cable ends have soldered open eyelets which are held against the brushes by the machine screw / spring washer. Platts shows these Lucas starters were fitted between 1932 and 1939. I suppose it's possible someone in the past has fitted a different end plate to your starter. The M35G starter fitted to the Morris 8 Series E used copper tailed brushes - Lucas Part No. 255659 perhaps these might fit your end plate?

Hi Jeff,
Thanks for checking and the infomation, very useful.
The Lucas fitted to my RM is M35A BN11 Part 250021 12 0. (Guess that is December 1930, correct for the car)
I looked at John Platt 1983 and it looks like the CAV arrangement, apart from a front bush rather than the roller bearing in the CAV?
I have found a set of NOS brushes on e-Bay https://www.ebay.co.uk/itm/LUCAS-M35G-ST...2749.l2649.
I would need to modify the double brush to make it a single and solder it onto to the field winding. The other one with the earth connection is fine.
I never knew car detective work was so interesting!!
The M35G end plate complete would fit, I think, but would need the through bolt holes drilled to suit my starter.
I hope I am on the right track!