[AT] John Deere power unit

[John B]

I have the instructions for timing the magneto from the operator's manual. I have it saved as a .pdf file. Email me directly at rustyacres at yahoo.com and I will send them to you.


John Boehm
Woodland, CA
Visit our web site at http://vintagetractors.com



>________________________________
> From: Mike <meulenms at gmx.com>
>To: Antique tractor email discussion group <at at lists.antique-tractor.com> 
>Sent: Tuesday, July 9, 2013 4:32 PM
>Subject: Re: [AT] John Deere power unit
> 
>
>Sure sounds like a timing problem, hopefully some John Deere guys will 
>jump in and help you out. Mike M
>On 7/9/2013 6:47 PM, Greg Hass wrote:
>> At an estate auction recently my brother bought a John Deere LUC power
>> unit that had been on a pull type combine.  It was sold as is because
>> the mechanic hired by the family to get everything running had been
>> unable to get it started. The mechanic said that it had spark, but that
>> an exhaust valve was stuck open but he ran out of time to go any
>> further. After getting it home, my brother was able to get the valve
>> working without removing the head. The gas bowel was leaking gas to bad
>> to use but he was able to get a little smoke by squirting gas in the
>> carburetor,but after fixing the bowel gasket; no fire. I helped him take
>> apart the carburetor and we could tell the previous owner had never
>> gotten it running, although it appears he tried as it had a new muffler,
>> had been nicely painted, and he had made a new gas bowel gasket
>> (unfortunately he made it out of corrugated cardboard,thus the leak.) A
>> few days ago my brother installed a kit in the carb and cleaned it up.
>> He has gotten some smoke out the exhaust and also actual fire out of the
>> carb; the air cleaner is unhooked while he tries to get it started. I
>> was there a couple of nights ago when he cranked it any we both think it
>> is a timing problem (could be bad valves but we don't really think so at
>> this point.) The problem is,at this point we have no idea of what the PO
>> might have done. Did he have the mag out and got the timing off putting
>> it back on, is the mag tilted wrong, are the wires reversed; or is the
>> mag off half a turn? Also we don't understand this engine as to how it
>> fires. Is it even or does it have that odd JD firing order; we have
>> always been IH people but lately my brother has started jumping ship. My
>> question to the list is this; any help on how to set the timing on this
>> engine would be greatly appreciated.
>>                   Greg Hass
>>
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