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SUCCESS!!! Just repaired Stihl 045/056 Bosch electronic ignition!!!!!

foggysail

foggysail

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Many here in the forum may have read my recent posts regarding the Bosch electronic ignition. My 056 pooped the bed or better still make that my lawn while I was in the middle of clearing trees. And yes, problem was no spark. I have also read numerous posts stating that the cause is "coil opening while hot." Well folks, I doubt its either of the magnetic devices in the ignition needed for it to function. My advice....save your money, do not replace the high voltage transformer or the charging inductor. They are the least likely to fail but my saw's component that did fail operated on the border of component death. Just a matter of time before they all fail.

The problem resides in the potted electronics, that area between the charging inductor and the high voltage transformer. AND THEY CAN BE REPAIRED! NO so called little fix all boxes to take the place of the original ignition, no retiming, just bright blue spark or at least that is what mine now displays in my basement after repair.

Now here is a gutcha. If somebody will part with a junk ignition which I need for two reasons, I will take pictures of how to make the repair, provide written instructions and explain which part needs to be purchased. I purchased my part on EBay, bought 10 of them, delivered for under $7 bucks.

The reason I need another ignition is to verify this is the common fault that folks experience with an ignition failure. I think it is but I feel uncomfortable with a repair sample of 1. The next reason is mine is too ripped apart (it functions though) to take pictures for repair instructions. If anybody in the forum has one they want to contribute to the cause, I gladly pay for shipping and handling. This is a chance for every 045/056 with bad ignitions to get their saw running again. Mine now works.... I have not yet started the saw, just got may parts in this afternoon and rushed to install one. Just too anxious to put that off.

So there you have it. I believe all the failures or at least the greatest number of them are from the same component failure. Too many guys have seen their great 045/056 go belly up with no practical repair. There is hope guys and it is free but I am not going to even attempt to describe how to make the repair until I can do it properly. And you do not need electrical skills although you will need a soldering iron and solder purchased from Radio Shack or some other place that sells electronic stuff. The repair probably take around an hour to complete. You cannot use plumbing solder. So lets see how much interest this thread excites if any.

Foggy
 
psuiewalsh

psuiewalsh

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I would like to see your method as well as long term running. I had the same excitement with an 045 and the chip. It would still fail when the saw got hot.
 
NIP Group
foggysail

foggysail

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I SEE THAT YOU READ MY POSTS!!! : - )

Yes indeed, it is an internal capacitor that is the cause of the problems. And part of the fix is not only to replace that capacitor but to move it. The repair is simple......once you know how! That is the essence of my request for a dog so I can take pictures, write up instructions and so forth.

This was not a simple find! I had to rip apart my unit to get access to the interior printed circuit board and then trace out the circuit so I could analyze it. And by the way, that capacitor is something special because it needs a pulse rating. My fix will work guys and if you want it, you know what I need to have in order to provide it.

And one last thing, my fix takes care of temperature issues. Hey--- I am trying to help you guys, not screw with you. I have a degree in electrical engineering, years of circuit design experience. You guys out in the woods cutting trees for a living face a hard enough job just getting home safely to your families every night without needing to worry if your tools pooping the bed.

Foggy
 
foggysail

foggysail

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Thanks guys! Those of you who do repairs should follow my suggestion and spend the 7 bucks for 10 of those needed capacitors while they are available for almost nothing on EBay. See post 7 above
 
R DeLawter

R DeLawter

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Oct 31, 2009
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Thanks guys! Those of you who do repairs should follow my suggestion and spend the 7 bucks for 10 of those needed capacitors while they are available for almost nothing on EBay. See post 7 above
I just ordered 10 of them.
It is neat that you are willing to tackle this problem and help others. A lot more drive then many people your age.
 
XSKIER

XSKIER

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Is it the same trigger assembly as an 020AV? I have a dead one I'll send ya. Pm me your coordinates.
 

046

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Joined
Apr 8, 2004
Messages
77,363
Location
Oklahoma
Many here in the forum may have read my recent posts regarding the Bosch electronic ignition. My 056 pooped the bed or better still make that my lawn while I was in the middle of clearing trees. And yes, problem was no spark. I have also read numerous posts stating that the cause is "coil opening while hot." Well folks, I doubt its either of the magnetic devices in the ignition needed for it to function. My advice....save your money, do not replace the high voltage transformer or the charging inductor. They are the least likely to fail but my saw's component that did fail operated on the border of component death. Just a matter of time before they all fail.

The problem resides in the potted electronics, that area between the charging inductor and the high voltage transformer. AND THEY CAN BE REPAIRED! NO so called little fix all boxes to take the place of the original ignition, no retiming, just bright blue spark or at least that is what mine now displays in my basement after repair.

Now here is a gutcha. If somebody will part with a junk ignition which I need for two reasons, I will take pictures of how to make the repair, provide written instructions and explain which part needs to be purchased. I purchased my part on EBay, bought 10 of them, delivered for under $7 bucks.

The reason I need another ignition is to verify this is the common fault that folks experience with an ignition failure. I think it is but I feel uncomfortable with a repair sample of 1. The next reason is mine is too ripped apart (it functions though) to take pictures for repair instructions. If anybody in the forum has one they want to contribute to the cause, I gladly pay for shipping and handling. This is a chance for every 045/056 with bad ignitions to get their saw running again. Mine now works.... I have not yet started the saw, just got may parts in this afternoon and rushed to install one. Just too anxious to put that off.

So there you have it. I believe all the failures or at least the greatest number of them are from the same component failure. Too many guys have seen their great 045/056 go belly up with no practical repair. There is hope guys and it is free but I am not going to even attempt to describe how to make the repair until I can do it properly. And you do not need electrical skills although you will need a soldering iron and solder purchased from Radio Shack or some other place that sells electronic stuff. The repair probably take around an hour to complete. You cannot use plumbing solder. So lets see how much interest this thread excites if any.

Foggy
detailed repair instructions along with clear pictures sure would be appreciated!!!! and much needed ..don't worry about ugly pictures. what's more important is explaining what needs to be replaced/fixed.

I've got a dead coil to send ... start conversation if you want it for a test Guinea pig
 
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