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Re: Roadster Starter Motor [Re: sospan] #556704
30/01/19 08:24 AM
30/01/19 08:24 AM
Joined: Feb 2016
Posts: 1,769
East Harling, Norfolk UK
Richard Wood Offline
Talk Morgan Enthusiast
Richard Wood  Offline
Talk Morgan Enthusiast

Joined: Feb 2016
Posts: 1,769
East Harling, Norfolk UK
Originally Posted By sospan
Definitely check the solenoid and connections, especially the earth.Years ago I had a car (not Morgan) with the same symptoms of clicking but no engagement. The motor itself was ok but the solenoid failed to engage the gear. A local auto electrical specialist cleaned and sorted it. I occasionally had to tap the solenoid (with a piece of wood )on the top of the motor to unstick it.


Yes to work efficiently the solenoid armature has to be a close fit to the soft iron core surrounding it, which provides the magnetic field to energise. A tiny amount of corrosion on the armature can cause it to partially jam giving rise to the temporary cure of tapping it with a soft hammer.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1967 Land Rover series 2a SWB
1960 Velocette Venom
Re: Roadster Starter Motor [Re: John V6] #556781
30/01/19 04:56 PM
30/01/19 04:56 PM
Joined: Dec 2008
Posts: 17,503
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
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Joined: Dec 2008
Posts: 17,503
South Yorkshire
The most unusual problem I had with a clicking solenoid was a hairline crack in the battery positive terminal.


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4
Re: Roadster Starter Motor [Re: John V6] #556916
31/01/19 10:30 AM
31/01/19 10:30 AM
Joined: Jul 2007
Posts: 13,434
Suffolk
John V6 Offline OP
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John V6  Offline OP
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Suffolk
Too cold to fiddle today -2c. But I turned the car over & it started perfectly.


JohnV6
2006 Indigo Blue Roadster S1
Re: Roadster Starter Motor [Re: John V6] #557362
01/02/19 09:47 PM
01/02/19 09:47 PM
Joined: Apr 2014
Posts: 3,075
Dorset, UK
milligoon Offline
Talk Morgan Addict
milligoon  Offline
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Joined: Apr 2014
Posts: 3,075
Dorset, UK
If it's the Jag one fitted to mine then it already is a high torque type, the problem with mine was that it was over greased and the dust from the clutch gummed up the works in the solenoid.

Stripped it down cleaned it leaving the shaft grease free, put it back on and it worked a treat.


Mark - driving
Archie the Old English Sheep Mog...........
2010 Roadster 3.0 V6 (S3) wink
Re: Roadster Starter Motor [Re: John V6] #557458
02/02/19 02:42 PM
02/02/19 02:42 PM
Joined: Apr 2016
Posts: 115
Hampton Hill, Middx.
DavidR Offline
L - Learner Plates On
DavidR  Offline
L - Learner Plates On

Joined: Apr 2016
Posts: 115
Hampton Hill, Middx.
I had a similar problem on a K series caterham, that didn't like to start when the engine was hot. Being a passenger on a track day with my son facing oncoming traffic at Brands following a spin, reminds you why you need a reliable starter!

It was finally tracked down to the starter not being exactly square to the flywheel and ring gear this was exaggerated when hot, effectively jamming the starter. Being tucked up under the exhaust manifold, didn't help either. A high torque replacement and some fettling of the mounting flange to square it up, solved the problem.

Not spinning also helps blush


David
Aero S4
Re: Roadster Starter Motor [Re: John V6] #559335
12/02/19 11:11 AM
12/02/19 11:11 AM
Joined: Jul 2007
Posts: 13,434
Suffolk
John V6 Offline OP
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John V6  Offline OP
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Joined: Jul 2007
Posts: 13,434
Suffolk
Well as I had time today & it is a balmy 10c so I started the testing.
To my joy when I used a jump lead as a second earth it started. Take of the jump lead a it would only click.

The earth from the engine is hard to reach. I had to take off the air filter for access.

I cleaned up the contact areas & rebuilt it.
Will now buy a second earth lead as belt and braces.


JohnV6
2006 Indigo Blue Roadster S1
Re: Roadster Starter Motor [Re: John V6] #559337
12/02/19 11:21 AM
12/02/19 11:21 AM
Joined: Dec 2009
Posts: 20,280
Devonshire
+8Rich Online content
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+8Rich  Online Content
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Joined: Dec 2009
Posts: 20,280
Devonshire
That's a good one fixed John thumbs.


Regards Richard

1999 Indigo Blue +8
2009 4/4 Sport Green
1994 Connaught Green +8





Re: Roadster Starter Motor [Re: John V6] #559347
12/02/19 11:50 AM
12/02/19 11:50 AM
Joined: Jul 2007
Posts: 13,434
Suffolk
John V6 Offline OP
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John V6  Offline OP
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Posts: 13,434
Suffolk
Yes Richard. I spent last week on holiday worrying about it.
The crazy part is the earth looked fine & was tight.


JohnV6
2006 Indigo Blue Roadster S1
Re: Roadster Starter Motor [Re: John V6] #559358
12/02/19 01:23 PM
12/02/19 01:23 PM
Joined: Feb 2016
Posts: 1,769
East Harling, Norfolk UK
Richard Wood Offline
Talk Morgan Enthusiast
Richard Wood  Offline
Talk Morgan Enthusiast

Joined: Feb 2016
Posts: 1,769
East Harling, Norfolk UK
Good result John. As the chassis is an important part of this high current circuit it may be worth checking the negative battery connection to it as well.

Ohms law dictates that a fixed resistance will create a volt drop proportional to current.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1967 Land Rover series 2a SWB
1960 Velocette Venom
Re: Roadster Starter Motor [Re: John V6] #559360
12/02/19 01:38 PM
12/02/19 01:38 PM
Joined: Jul 2007
Posts: 13,434
Suffolk
John V6 Offline OP
Member of the Inner Circle
John V6  Offline OP
Member of the Inner Circle

Joined: Jul 2007
Posts: 13,434
Suffolk
Yep, I made a mental note to self to look at all the earthing points tomorrow when I will have the time.


JohnV6
2006 Indigo Blue Roadster S1
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