• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)

TR2/3/3A Early/Late Starter?

Tropical TR

Jedi Hopeful

I think the pictured starter is the "Bullnose" or "Bomb" type used on pre-TS50000 cars. Is that correct? From what I have read, supposedly this will work fine with post TS50000 cars (with the transmission bulge) as long as there is a press-on flywheel ring, but one should not try to use it with a bolt-on ring. Your verification would be appreciated. Believe I just restored the wrong starter (even if it was on my car before).....



Great Pumpkin - R.I.P
I can't quite make out the number on the starter; but assuming that is a TR3 starter then that's all correct. The Lucas part number stamped into the housing should be 25541 if it's an original (though there are some other numbers that will work).
Note that it's also a different flywheel for the pressed-on ring gear and early starter.

The early starter won't work with some tubular headers, but doesn't sound like that's an issue for you. The stock exhaust manifold angles forward a bit to clear the starter.

Geo Hahn

Country flag
...one should not try to use it with a bolt-on ring...

True in theory, but not the case in my experience (which is limited to one car).

Sometime before I got my pre-50000 TR3A the engine was replaced with a post-50000 variety that has a bolt-on ring gear. Because they still had the original gearbox (no big bulge) they reinstalled the earlier starter.

It has been like that for the 37 years I have had the car and it works fine. I suppose it is possible that the flywheel eventually got its teeth battered into submission and they now resemble the beveled teeth of the press on ring gear - at least in the two areas that are available for engagement when the engine stops.

Bottom line - don't do it, it doesn't work -- unless you (like me) are oblivious to the problem for a few decades.

Good news is: with luck you may be able to sell that bomb, buy a correct rebuilt and come out money ahead.

Tropical TR

Jedi Hopeful
Thanks Geo and Randall. The number is 25541H and there is a "9 58" after it. I'm guessing that could be production month/year. So now I just need to conform which flywheel I have. If it is the older style, then I could still be in business with this starter, right?

Geo Hahn

Country flag
Yes. I cannot recall if you can see the presence or absence of bolts by peering into the starter opening but certainly removing the sheet metal cover from the lower part of the bell housing will reveal all.


Great Pumpkin - R.I.P
The ends of the holes for the ring gear bolts are visible through the starter hole.

IMO the early starter is better in some ways, a slightly better gear ratio and the shaft supported at both ends. Its weak point is the bonded rubber drive sleeve, which doesn't like engines that have been modified with high compression or oversize liners.

But either one will work fine, as long as you have the right flywheel with it.

PS, I have seen the combo Geo mentioned fail. It worked at first, but after a bit of wear, the gear teeth would slip.

Tropical TR

Jedi Hopeful
Thanks again Randall and Geo. I know the way ahead now...

Regards, Walt
Similar threads
Thread starter Title Forum Replies Date
Michael Oritt Spridget Differential Carrier--early versus late question Spridgets 1
Mickey Richaud Early [late 30's?] 10 Spotted 0
D Late to early bumper swap Triumph 10
dklawson 150 CD Carb Floats - Early vs Late ? Triumph 2
glemon TR6 TR250/early TR6 v. late TR6 Different Speedo Ratio Triumph 4
BobbyD TR6 Early vs Late TR6 Interior Panel Differences? Triumph 5
A Early splines on late spindles-bearing question Austin Healey 3
1 MGB MGB: early or late? MG 7
A TR6 TR6--late/early model head question. Triumph 8
philman Wedge early/late tr7 differences Triumph 3
A Headgasket , difference between late and early ?? Triumph 2
T Early engind / late Transmission Triumph 5
Boink Early Mini Fuel Gauge - adjusting it British Motor Corp 0
A Early 1967 AH Sprite - installing steering column and new directional switch? Spridgets 0
A TR2/3/3A Early TR3 starter (bomb style) bushings sizes Triumph 5
JPSmit Pre-War Is it too early to write Santa? 1933 MG J1 MG 13
Twit early TR4 Crank Handle wanted Triumph Classifieds 0
T Early BJ7 Vent Window Seal Austin Healey 2
S For Sale Early Sprite & Midget Speedometer/Tachometer/Generator etc. Spridgets Classified 2
Twit TR4/4A early tr4 check straps Triumph 4
oldbagpipe Wanted Early TR4 Silver [Aluminum] Dash Cluster Triumph Classifieds 1
rr64 Wanted Early MGB Inner Steering Track Rods Wanted MG Classifieds 1
oldbagpipe Located Early TR4 Glove Box Hinges Triumph Classifieds 0
PAUL161 MGB Early B Banjo Rear Gears MG 2
R TR4/4A Early TR4 seat pans Triumph 26
oldbagpipe Wanted Early TR4 Short Bubble [Bulge] Bonnet/Hood Triumph Classifieds 1
HealeyRick Early Healey History Austin Healey 2
red57 Wanted WTB Early Austin Healey Horns Austin Healey Classifieds 1
K MG Midget Early and Later model rear brake shoes.... Spridgets 2
oldbagpipe For Sale Early 1969 TR6 'Stalled Project' $4500 Triumph Classifieds 0
CharlesBN1 Wanted WTB Shelley Jack [6 INCH DL] for Early BN1 Austin Healey Classifieds 0
J For Sale Early 70s TR6 seats in new red vinyl, with new tracks, $500 OBO Triumph Classifieds 0
oldbagpipe For Sale Early 1969 TR6 Project for sale Triumph Classifieds 10
CharlesBN1 Wanted wanted to buy - sidescreen trim/strips for early BN1 Austin Healey Classifieds 5
M Old English White Paint Code for early BE Spridgets 1
B Side window question for early Longbridge BN4 Austin Healey 4
M MGB Early MGB engine compatible with later transmission MG 2
B Wanted 100-6 or early 3000 upper and lower grille opening pieces Austin Healey Classifieds 1
John Turney BN4 to Early BJ8 Rear Axle Austin Healey 12
S TR2/3/3A shifting tower shifting rods on an early tr3 tower Triumph 11
Csarneson Early BN4 steering box pitting Austin Healey 16
dklawson GT6 Float Height, 150CD [Early CD, Not Later CDSE or CD2SE] Triumph 7
M TR6 Early vs newer pdwa for Tr6 1975. Triumph 3
S TR2/3/3A banjo bolts to seal up on the early SUs Triumph 4
N Wanted Early rear tail light lens Triumph Classifieds 0
H Post-War Other Wiper Motor [Early type DR2] Issue Triumph 7
Randy Forbes Reid gave me an early Christmas present... Austin Healey 11
K Correct side screen nut for early 58 BN4 Austin Healey 14
S TR2/3/3A how to install a gas tank in an early tr3 Triumph 8
R For Sale 1956 Early small mouth TR3 Triumph Classifieds 1

Similar threads