[SEL] Wico type EK magneto help wanted

[frappi at wcoil.com]

Arnie,
Mark has undersized bushings made just to do what you mentioned. Fit to a
shaft thats been worn and trued up. Long as its not worn too bad. If the
shaft is worn too badly then it will need a new bottom frame, or bush the
worn shaft, Theres a couple ways to skin that cat.
 Rupert, As for clearances I'd estimate a couple thou. Should be easy for
you to whip one out. I assume you will true up the old shaft? No need to
oversize like we do for other things when compensating for thermal
expansion. Snug as you can get and slide easy with a speck of lite oil.  
     Mark


> Rupert,
>
> I haven't seen any replies to this one yet.  The sloppy fit due to wear is
> a common
> problem with the Wico EK mags.  And it definitly will affect performance
> up to and
> including no spark at all.  The two armature arms must pull off the coils
> at the
> same instant with a good SNAP.
>
> You should probably be able to true up the shaft and make a custom bushing
> that is
> just a slip fit.  OTOH, most of the "mag guys" like Mark's Magnetos will
> do an
> exchange of your Wico EK for one that is guarenteed to work (new coils &
> condenser,
> new busing, all in proper adjustment, etc.).  The cost of the new exchange
> mag isn't
> that much.  If your "repair" doesn't do the job, consider doing the mag
> exchange.
>
> See ya,  Arnie
>
> Arnie Fero
> Pittsburgh, PA
> fero_ah at city-net.com
>
> On Thu, October 22, 2009 1:27 pm, Rupert wrote:
>> Hello Guys,
>> 	My son-in-law has a Wico EK series magneto that is not firing
>> consistently. In other words, it takes more than one trip for it to
>> fire. He thinks the armature bushing and/or the guide rod is worn as the
>> fit is very sloppy may be causing the problem.  I can make a new bushing
>> for him but I need to know what clearances are required. The manual I
>> have from the "oldengine site" gives data on setting the points but
>> doesn't say anything about the fit of the armature bushing to the guide
>> pin.
>>
>> 	Does anyone have any data or dimensions of the guide rod and the
>> armature bushing so I can check it?
>
>
>
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