Starter motor testing - next steps?

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MarkHawkins
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Starter motor testing - next steps?

Post by MarkHawkins » Wed May 23, 2018 10:06 pm

OPJ the 6a began getting hard to start the other day and now won't turn over at all. 2 batteries have been tried that will start other cars. I checked the earths and found one from the engine block wasn't really connected so connected it again - still no turning over. There is power to the starter (main lead) and if I put 12 volts to the solenoid I get a quiet click but nothing else. Turning the ignition key normally with the lights on does not result in the lights dimming. Rocking the car in gear does not 'release' the starter. What would be the next steps in testing?


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1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
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Terry H
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Starter motor testing - next steps?

Post by Terry H » Wed May 23, 2018 10:15 pm

Try tapping the starter with a hammer.
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Old and Slow
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Starter motor testing - next steps?

Post by Old and Slow » Wed May 23, 2018 10:20 pm

Could be the heavy-duty contacts inside the solenoid, they go high resistance. Someone who knows the 6A starter can probably advise whether you can open up the solenoid to clean up the contacts.
I don't know the layout but is it possible to use a jumper lead to go directly from the starter contact AFTER the solenoid to the battery? With the ignition turned off, if you can by-pass the solenoid contacts the motor should spin, but you'll need to be careful as you'll have 100's of amps flowing, lots of sparks and a risk of "welding" the jumper lead clip to the battery!
Alternatively, it could be the carbon brushes inside the starter itself, or the commutator may be worn.
BTW, even though you can hear the solenoid "click" it doesn't mean the contacts are being made electrically.
Hope this helps.
Philip


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
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Jimscim
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Starter motor testing - next steps?

Post by Jimscim » Wed May 23, 2018 10:39 pm

Maybe your next step could be a Wasp pms 014 Hi Torque starter . Stewart Wells is organizing a group discount , maybe good timing on your part !


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MarkHawkins
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Starter motor testing - next steps?

Post by MarkHawkins » Thu May 24, 2018 12:31 pm

What sort of price after discount would I be looking at?


Custodian of :

1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
ex 1985 GTC M/overdrive B205 AMT - number 413
ex 1984/85 SS1 number 0007 (1300)

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Starter motor testing - next steps?

Post by Jimscim » Fri May 25, 2018 8:36 am

We are waiting for Stewart to report back after talking to Wasp .


RSSOC 3408 1979/80 Scimitar 6a . Mulberry / white .

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MarkHawkins
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Starter motor testing - next steps?

Post by MarkHawkins » Fri May 25, 2018 10:38 pm

I checked around and found secondhand ones at £60 from a trader, hi-torque uprated ones at £220 (powerlite) or so and made in Netherlands 1.8kw ones at £130. I bought one of these, fitted it and now the car starts fine (much quicker turning over - better than it ever has in 4 years). Now I have a new issue of overheating that came to light in a 4 mile drive - will investigate in the light.


Custodian of :

1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
ex 1985 GTC M/overdrive B205 AMT - number 413
ex 1984/85 SS1 number 0007 (1300)

Jimscim
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Starter motor testing - next steps?

Post by Jimscim » Thu Jun 14, 2018 6:19 pm

What do they say , One door opens and another slams shut 😂🤣😀


RSSOC 3408 1979/80 Scimitar 6a . Mulberry / white .

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