Very low spark on 102 model AC

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winter
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Very low spark on 102 model AC

Post by winter » Mon Apr 01, 2013 9:27 pm

Hi,

Our 102 model AC had not any spark in the beginning.
After cleaning up the points of the Villiers Ignition and correcting the distance between the points to 0,20 mm (is that correct?) and a fresh sparkplug we got a very light spark, not enough to get the engine running.

Could this happen because of the concensator and if so, how can we recognize that.
Or are there other possibilities?

Evert Winter
Hasselt, Netherlands

Keith.P
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Re: Very low spark on 102 model AC

Post by Keith.P » Mon Apr 01, 2013 9:47 pm

I had the same problem on another motor not long ago, your best option would be to test the coil first, once that is found to be OK, then you can fix any other problem.
The condenser is located under the points and is still available if needed, but if your coil is duff, there is no point.

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Charles uk
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Re: Very low spark on 102 model AC

Post by Charles uk » Mon Apr 01, 2013 11:11 pm

The points gap is 0.020" or 0.50mm.
Make it idiot proof and someone will make a better idiot.

winter
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Re: Very low spark on 102 model AC

Post by winter » Tue Apr 02, 2013 6:21 am

No point means that there is no solution?
And OK, we will change the gap to the right 0,50 mm.

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1650bullet
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Re: Very low spark on 102 model AC

Post by 1650bullet » Tue Apr 02, 2013 7:23 am

Try resetting the point gap first. 20 thou. And then try resetting the points to 10thou if its no good on the 20thou gap. Dont ask why but if you close the gap up a bit it does make a bigger spark. It does say in the forums FAQs section that anything from 10 to 30 thou. It depends on the motor and owner. If still a problem give your coil a test.

This youtube clip is a good giude on how to test a villiers coil. Its not a seagull motor but its running the same ignition.

http://youtu.be/7l-bXz9FBf0

winter
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Re: Very low spark on 102 model AC

Post by winter » Thu Apr 04, 2013 9:08 pm

Thanks to all for the advices.
Next week I will work it out.
Let you know the results.

Right now we are working on a 1936 Johnson model 200.
Hard to start but it worked after cleaning tank and carb.
Wow, that sound and the smell of the exhaust.
Our concern is now the cooling.
So we are busy enough at the moment.
Bybthe way, does anyone know the oilmix? Is it 1:10?

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1650bullet
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Re: Very low spark on 102 model AC

Post by 1650bullet » Sat Mar 08, 2014 7:44 pm

Yes its 10-1.

rustbucket
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Re: Very low spark on 102 model AC

Post by rustbucket » Sat Mar 22, 2014 2:16 pm

1650bullet wrote:
This youtube clip is a good giude on how to test a villiers coil. Its not a seagull motor but its running the same ignition.

http://youtu.be/7l-bXz9FBf0
I think it's an even better guide to replacing a failed coil with one of the (much cheaper) 19373 "short" coils .
Which happens to be very timely , as I'm in the midst of doing that right now .
Note the little copper contact patch he soldered on , for the high tension lead ...........

Tom , grateful for the guidance

Keith.P
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Re: Very low spark on 102 model AC

Post by Keith.P » Sat Mar 22, 2014 2:36 pm

I did one yesterday, as I wanted a spare.
But I did have to make spacers as its a smaller coil, haven't tried it yet.
Video is using a universal coil with a brass tag, seagull one's have a button, but the universal one can still be used.

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Stelios_Rjk
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Re: Very low spark on 102 model AC

Post by Stelios_Rjk » Sat Mar 22, 2014 3:46 pm

You should have some serious fun removing those 2BA screws :D
Yesterday I tried to remove a nut that holds the HT lead wire and the screw snapped. Silly me, I didn't realize the torque that I applied. And the joy began. I couldn't apply as much heat as I wanted as the coil is good. In the end I drilled, taped and replaced the screw.
I love the 10600/145 turns!!!

rustbucket
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Re: Very low spark on 102 model AC

Post by rustbucket » Sun Mar 23, 2014 2:55 pm

Stelios_Rjk wrote:You should have some serious fun removing those 2BA screws :D
Do you mean the little flat head screws, that are part of what's holding the iron blocks to the base plate ?
Those are a bear to get out- mine wouldn't budge with a regular screw driver, even well soaked with penetrating oil.
Out of desperation, I finally tried my cordless impact driver, with a straight bit - One brief shot each, and they were loose !

sassi232
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Re: Very low spark on 102 model AC

Post by sassi232 » Sun Mar 30, 2014 2:09 am

If the engine has not been used for some time,remove spark plug,find a socket that will fit the dome nut and spin the motor with an electric drill at medium speed for 2 or 3 minutes and this will re-magnetise the flywheel magnets. Clean points and plug gap etc with fine emery paper and you should get a nice fat spark.
All this info. is on this site!

Keith.P
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Re: Very low spark on 102 model AC

Post by Keith.P » Sun Mar 30, 2014 9:39 am

No amount of spinning the flywheel with a cordless drill will re-energise a dead coil with no continuity.

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Charles uk
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Re: Very low spark on 102 model AC

Post by Charles uk » Sun Mar 30, 2014 11:10 am

Or remagnetise the magnets, but it might erode some corrosion off the faces of the points wether by spark errosion or by physical contact.

You will be suprised how often a "dead coil" will spring back into life after a second or third points cleaning & gapping.
Make it idiot proof and someone will make a better idiot.

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