LarryMitchell
I have a overspeed and failure to run problem on this unit. It has been in service since 2005 or about 10 years and has had very little actual use. Its been mostly in auto mode conducting self tests weekly for that period of time. I check a week ago and found the overspeed light on. I switched it off and cleared the overspeed light but it will not start. Both spark plugs don't appear to be firing. The operation manual schematic depicts a PCB feeding the each ignition module that feed each spark plug. Since both spark plugs don't fire, can I assume the PCB (0D8615 control board) is the issue? Can someone direct me to a service manual for this unit?

Any help will be greatly appreciated.

Larry
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Peddler
You need to post the SN of the unit. The PCB board only shorts the coils to ground to stop it. Depending on the age it may also pick up the run crank signal from the #18 wire going to the grounding stud. The coils are self energizing off the flywheel for the secondary. It would be unusual for both to fail at once so I would try disconnecting the 18 wire at the ground stud to see if the unit will fire when cranking. If the 18 wire ids disconnected the unit won't start as it needs a crank signal to open the fuel valve. Peddler
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LarryMitchell
I was told by a repairman that it had two magnetos and both needed to be replaced...
Item - 0046742
Serial - 4083490

Larry
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LarryMitchell
I Need to add that the service repairman did test the 18 wire and it did not fire.

Larry
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Peddler
OK so your unit was older than I thought and it gets the run signal from the generator.
If it has no spark with the 18 wire disconnected then it is either the coils or the coil wiring harness. On the overspeed light if it was flashing this means no AC output which is normally dirty slip rings. So regardless my advice would be to get a coil kit, there are two, and a wiring harness and install them on your unit. While you have it apart check the brass adapters in the demand regulator to make sure they are tight and when you reassemble you will need some silicon to seal the intake tubes on the air box end. Once you get the unit running you can check out the overspeed condition. While you are taking the air box off check the throttle quadrant on the air box to make sure it is secure to the throttle shaft. If the throttle quadrant came off while running it could have a true overspeed and then wouldn't start if it was in the closed position. You really should get a service and repair manual from the sponsor of the forum. Ziller electric, if you are going to atempt this yourself. Good Luck, Peddler
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LarryMitchell
Thanks so much for the info. Much of what you have stated I am not familiar with so I will need a service manual. The coils you mention are probably the magnetos the repairman indicated that were bad. I was very impressed with the repairman who did the diagnostic service call.
Is there a preferred way to contact the Ziller electric for a manual?
Larry
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John R
You can get them right from this site.
[url]http://www.zillerelectric.com[/url]
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Skip Douglas SkipD
LarryMitchell;36667 wrote:
Is there a preferred way to contact the Ziller electric for a manual?
Call Kelly Myers at Ziller Electric. The number is (888) 294-5537. Kelly is the owner of Ziller and is often quite busy so you may not get him immediately. If someone else answers the phone, you could ask if Kelly is around and, if not, ask if someone else can help you with a Diagnostic Repair Manual.

Just so y'all know, I don't work for Ziller. I'm retired, living in Wisconsin, and simply offer my time to help Kelly with the forums via remote control.
Skip Douglas
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LarryMitchell
Peddier, John, Skip, thank you all for your help. It is greatly appreciated. If you need anything from me, feel free to contact via email. I owe you all.

I will contact Ziller Electric for a service manual.

Larry
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MacL
Not sure the service manual is going to give you step by step instructions on replacing the magnetos. These are diagnostic manuals, not really repair instructions.

And I'm sure you will not enjoy it. I replaced a set today, it's nothing to me, 2.25 hours and I'm out.
State your problem, not your diagnosis.
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