Repair Vlach Ignition Unit for Evolution 58GX?  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> MVVS Support >> Repair Vlach Ignition Unit for Evolution 58GX?
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Repair Vlach Ignition Unit for Evolution 58GX? - 7/1/2007 9:30:31 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Hi,
I was involved in a mid air yesterday, and sustained damage to the ignition unit. The wire leading from the pick-up to the ignition module was severed. (See picture). Having opened the unit, i can see that there are three wires, white, brown and green. The white one is still attached to it's original solder point on the circuit board; the green and brown came off from the solder joint. I assume that they came off the points right next to the point where the white one is attached (right next to the electrolytic capacitor).
Am I correct? Am I also right in thinking that the green wire goes to the point closest to the capacitor, and the brown one to the other?

I understand that any repairs done by me would not be warranted in any way, but I feel that I can repair it, if I know where to solder.


Thanks in advance

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RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/2/2007 8:46:46 PM   
pe reivers



Posts: 2991
Joined: 1/23/2002
From: Arcen, , NETHERLANDS
Status: offline 		check the shape of the severed joints. They should about match up, and you know what goes where.

_____________________________

Pe, Dealer for MVVS, MTW and Mejzlik; www.mvvs.nl
There is sanctuary in analisys.

(in reply to Ejiro)
       Post #: 2

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/3/2007 1:44:54 PM   
BaldEagel



Posts: 4284
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		Can someone take the cover off theirs and give the poor chap a picture?

Mike

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RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/3/2007 1:50:29 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Thanks for the response Pe. I could not tell from the shape, where each of the wires go; I am only relying on my intuition. I have soldered it now, and will try out the ignition unit when I get the chance.

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       Post #: 4

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/3/2007 1:55:30 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Yeah that would be brilliant if someone could do that!!! I have looked on the internet hoping to find a circuit diagram of some sorts; also spoke to the MVVS distributor in the UK (a very nice chap by the way), but they do not repair the modules. He says even MVVS does not repair the modules. Advice is to replace it, which is what I will have to do if the repair is unsuccessful. However, if I can get a picture of the internals from someone with said module, that will certainly help.

_____________________________

I have developed great respect for the modelling knife.

(in reply to BaldEagel)
       Post #: 5

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/3/2007 5:39:59 PM   
BaldEagel



Posts: 4284
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		If you are going to buy new I suggest you investigate the new automatic choke version, I find it works absolutly fine with no problems, Pe Reivers would have all the information you need, unfortunatly as much as John of Puffin models is a nice chap he would not know if the ignitions where compatable with the Evolution as he has only just taken over the MVVS distributorship and before that was electric only.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to Ejiro)
       Post #: 6

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/3/2007 8:23:57 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Thanks a lot for the suggestion, Mike. I actually, I have looked at the option, but the spark plugs are different. So perhaps that would also require a new cylinder head.

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I have developed great respect for the modelling knife.

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       Post #: 7

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/4/2007 1:26:56 PM   
BaldEagel



Posts: 4284
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		I doubt it, a spark plug of any size only requires a timmed voltage to fire it, I don't think the size will make any difference, ask Pe by a PM it will get to him quicker as the moderators on this Forum do not seem to be receiving notifications of postings.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

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       Post #: 8

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/4/2007 11:42:12 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Hi Mike,
The problem is not with the voltage to fire the plug, but rather with the threads the spark plug screws into. The old style had M14 threads and the new one is M10.

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RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/5/2007 12:10:39 AM   
BaldEagel



Posts: 4284
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		Understand, I wonder if there is an insert you could put in like a Helicoil you have 2mm clearance all around, again ask Pe Reivers he would know.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

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       Post #: 10

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/9/2007 2:42:36 PM   
janch


 

Posts: 205
Joined: 12/9/2003
From: Praha, CZECH REPUBLIC
Status: offline 		http://www.v-e.cz/ign_1ti.php

You can ask here.

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       Post #: 11

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/11/2007 7:15:07 PM   
pe reivers



Posts: 2991
Joined: 1/23/2002
From: Arcen, , NETHERLANDS
Status: offline 		I have made some plug inserts. MVVS also makes them by now. You also would need a different prop drive washer, because the latest ignitions have the magnets at 120 degrees, and not 180 degrees like the Vlach units.
It would be most convenient to get a new Vlach unit.
I must check if I have an opened unit arouns somewhere, and take a picture. That may help you to reconnect the sensor.


_____________________________

Pe, Dealer for MVVS, MTW and Mejzlik; www.mvvs.nl
There is sanctuary in analisys.

(in reply to Ejiro)
       Post #: 12

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 7/28/2007 4:13:52 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Thanks for the offer to help. I already tried soldering the wires where I figured they belong, but no joy. I get the one spark when connecting the battery, but nothing when flicking the hall effect switch over the magnet. I even swapped the green and brown wires, no change. So it appears that there was other damage somewhere in the unit.
I eventually got myself a brand new Vlach unit.

_____________________________

I have developed great respect for the modelling knife.

(in reply to pe reivers)
       Post #: 13

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 8/8/2007 2:46:03 PM   
BaldEagel



Posts: 4284
Joined: 10/12/2005
From: Wychling, Kent, UNITED KINGDOM
Status: offline 		Just for your information the Hall effect sensor needs two magnets to pass before it will fire the plug, on the new units this is at 120deg so it can tell if the engine has started backwards and shuts down the unit before any damage can be done to the reed valves, so I have been informed.

Mike

_____________________________

No matter what anyone says 100% is the maximum you can get.

(in reply to Ejiro)
       Post #: 14

RE: Repair Vlach Ignition Unit for Evolution 58GX? - 8/14/2007 4:21:00 PM   
Ejiro


 

Posts: 108
Joined: 5/13/2005
From: Chestermere, AB, CANADA
Status: offline 		Really!! So perhaps the unit I have is still working! Well I guess I will mount the engine on a stand when I can and test it. I guess that is why I did not get the spark.
Thanks for the information.

_____________________________

I have developed great respect for the modelling knife.

(in reply to BaldEagel)
       Post #: 15

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