Chaz
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| posted on 20/4/06 at 04:46 PM |
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Starter Motor NOT Engaging.
My starter motor is justing whirring round when i try to turn over the engine. I think its to do with the toothed pinion not moving down the shaft to
engage the flywheel. It is supposed to move isnt it??? I tested it out of the gearbox, and when it spins it doesnt move along the shaft....is that
right? If not how do i make it move?
I have mated a silver top zetec to MT75 with the original MT75 starter motor. I have been told that these do work together. I hope this isnt the
problem.
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stevec
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| posted on 20/4/06 at 05:09 PM |
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If it is wired correctly a pre engaged starter wont normally spin until the pinion has been thrown out,
Has it ever worked or is this first try?
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Chaz
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| posted on 20/4/06 at 05:20 PM |
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This is the first try. I think its wired correctly. It is spinning, but is there a slight possibility that it spinning the wrong way (due to incorrect
wiring) or is this impossible?
There are 3 connection points,
1 is earthed to the starter motor which i also have my premier wiring loom 'starter solenoid' (black/blue) wire going to it.
1 has nothing on it
1 at the top has the battery connected and loom main supply going to it.
Is that correct?
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omega 24 v6
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| posted on 20/4/06 at 05:31 PM |
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sounds like the solenoid is pulling in and starting the motor spinning but its not pulling the arm that slides the gear at the same time. Check the
Pivot point and that the arm end is connected (mechanically) to the solenoid.
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Chaz
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| posted on 20/4/06 at 05:53 PM |
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I will have a look, but i have 2 starter motors the same. I've tried both and both work in exactly the same way, when wired up.
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graememk
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| posted on 20/4/06 at 06:35 PM |
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sounds like wrong starter or wrong fly wheel to me.
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David Jenkins
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| posted on 20/4/06 at 07:08 PM |
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You could try it on the bench - hold the motor (firmly!) in a vise or workmate and connect a battery lead and earth - you should expect to see the
pinion move and then spin.
Don't try this with the engine lying on the bench - it'll fling itself any which way!
David
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Lawnmower
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| posted on 20/4/06 at 07:18 PM |
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I noticed my landy is doing this after fitting a new starter moter (not a pre engaged one).
was only doing it when engine was hot, so maybe some sort of thermal expansion jamming summit, or the spring is stiff, or the sliding cog is sticking.
yet to investigate, although my mate suggested removing it and greasing it up good and propper.
not to bothered as can also use the starting handle as a backup...
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MikeRJ
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| posted on 20/4/06 at 08:39 PM |
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Greasing the bendix will provide a short term fix until it clogs up with clutch dust and stops working altogether...
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Dusty
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| posted on 21/4/06 at 12:36 AM |
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You've wired it wrong. The B/Bk goes to the smaller terminal, not the other large terminal that goes into the starter.
There isn't a bendix to grease. If the B/Bk is wired to the correct terminal it moves the solenoid which is a heavy lump of copper which first
levers the gear into engagement with the flywheel ring gear and only then does it short between the solenoid contacts allowing current to flow to the
starter itself.
ps. Don't test it on the bench. It will rip your hand off with the torque if wired correctly. Better to test it bolted in the car
[Edited on 21/4/06 by Dusty]
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David Jenkins
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| posted on 21/4/06 at 07:09 AM |
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quote:
Originally posted by Dusty
ps. Don't test it on the bench. It will rip your hand off with the torque if wired correctly. Better to test it bolted in the car
[Edited on 21/4/06 by Dusty]
That's why I said fix it in the vise, or hold it in a workmate - the torque reaction is fierce.
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MikeRJ
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| posted on 21/4/06 at 07:20 AM |
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quote:
Originally posted by Dusty
There isn't a bendix to grease.
Sorry for any confusion, I was replying to Mr Lawnmower!
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Dusty
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| posted on 21/4/06 at 08:13 AM |
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Apologies to Dave and Mike. I was just back from a day trip to Brum from Plymouth and was suffering culture shock. Didn't read your replies
carefully enough.
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Chaz
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| posted on 21/4/06 at 02:46 PM |
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Woohoo, sorted. I did wire it correctly originally, just didnt earth it properly. Sorry for all the fuss. My engine has just turned over for the first
time since i yoinked it out of its old escort home 
Thanks for all the help!
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