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Starter Bolt Holes Dimension

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QuickSilver

QuickSilver

Jedi Trainee
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What is the measurement of the starter hole, center to center.

I'm thinking 4.75. Someone sold me a starter allegedly for a Mini but I think it's for an MGB.
 
Gawd.... Now you're makin' us break out dividers 'n SCALES!?!?

...Please stand by.
 
By my reckoning, the MGB starter from center-to-center is ~exactly~ five inches. Mounting bolts.

HTH!

..and sorry it took so long for th' reply!

3.25" for th' "big hole" of th' starter mounting in the backplate. 3.50" on th' backplate itself.
 
Thank you Dokter. So I pose to you all seasoned LBC autoists, what manner of car uses a starter similar to a Mini but is exactly 4.75 inches on the two bolts, center to center.
 
850~1098 Sprites would be my "first guess".

Not havin' an example handy, my "guess" could be waaay off, tho. :wink:

There were 1100's and 1275's in th' mix.

...can't see there'd be THAT many variants, tho.
 
Ealry model MGBs up thru 1967, and A series engine Spridgets take the same starter, in 1968 MGB went to the 4 syncro trannys and it changed.
 
So the five inch center-to-center is the earlier engines. I forgot about the change at the intro for the four synchro boxes. 1968~'80 the solenoid was integral then, too. I don't have a later one handy to measure.
 
Here's the culprit

DSCN1772.JPG


DSCN1771.JPG



Here it is (left) next to an Austin Mini one.
 
The MGB lugs for the later engines weren't off-center, IIRC.

You may have a Triumph unit there. Isolate it so's not to contaminate the MG parts. :wink: :jester:
 
Not an MGB starter of any year. Early MGB starters are an inertial drive gear rather than a pre-engaged starter like shown. Later MGBs have the pre-engaged starters, but with mounting holes on the centerline. Neither is it a Spridget, MGA or TD/TF all of which use the same, smaller starter with inertial drive gear.
Cheers,
 
A kind soul on another forum provided this information:

"M78R starter motor for petrol vehicles 2.5 litres and up - MGF/TF: Ranger rover county: landrover defender: landrover discovery"

Thanks.
 
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