jstmorris
Senior Member

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Hello Johnny; A review of a BMC Fast Moving Parts catalogue[1965], Lucas Fast Moving Parts catalogue [1973]; and Lucas 400 Master catalogues comes up with the following cross reference part numbers.
Model___________BMC___________Lucas________Serviced By:
BN1/2/6/7_______3H1281________25521________25612
BN4/BT7/BJ7/8___13H837________25578________25611
Regarding model interpretations, the symbols making up the model indicate the characteristics of each motor, i.e. M35G -- Starting Motor, 3 1/2" diameter yoke, die-cast commutator end bracket or frame.
Prefix
M____Starting Motor
35___3.5" diameter yoke
325__3.25" diameter yoke
418__4.125" diameter yoke
45___4.5" diameter yoke
Suffix
G____Die-cast commutator end bracket or frame
G-1__Die-cast commutator end bracket or frame, 4-brush
L____Long type starter
Within the types there are inboard, outboard, self-index, and Pre-engaged. The type you are concerned with is inboard.
Hope this helps somewhat.
--Scott
Model___________BMC___________Lucas________Serviced By:
BN1/2/6/7_______3H1281________25521________25612
BN4/BT7/BJ7/8___13H837________25578________25611
Regarding model interpretations, the symbols making up the model indicate the characteristics of each motor, i.e. M35G -- Starting Motor, 3 1/2" diameter yoke, die-cast commutator end bracket or frame.
Prefix
M____Starting Motor
35___3.5" diameter yoke
325__3.25" diameter yoke
418__4.125" diameter yoke
45___4.5" diameter yoke
Suffix
G____Die-cast commutator end bracket or frame
G-1__Die-cast commutator end bracket or frame, 4-brush
L____Long type starter
Within the types there are inboard, outboard, self-index, and Pre-engaged. The type you are concerned with is inboard.
Hope this helps somewhat.
--Scott