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Bad ignition

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steerr(at)bellsouth.net
Guest

Posted: Sun Feb 27, 2011 9:44 am Post subject: Bad ignition

Hello.  I have the EA-81 engine with dual ignition on my 601HD.  It has 

about six hours on it.  Since the very beginning, the engine would not 

start when running on the primary ignition (through the distributor).  

It has always started on the secondary ignition.  Until recently, I 

could start it on the secondary ignition and then switch to the primary, 

where it ran ok.  Now, if I switch to the primary ignition, the engine 

dies.



I've checked everything I know how to check.  The ignition wires are ok, 

the coil selector is ok, and there's power to the distributor (through 

the black wire).  Can anybody suggest other tests I can run to track 

down the problem?



Thanks very much for any help you can give me.



Bill Steer

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steerr(at)bellsouth.net
Guest

Posted: Sun Feb 27, 2011 2:52 pm Post subject: Bad ignition

Thanks, Frank and Larry.  I'll take a look in the distributor tomorrow.  

Hope you don't mind more questions as I go along.



Bill



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frank.hinde(at)hp.com
Guest

Posted: Sun Feb 27, 2011 5:23 pm Post subject: Bad ignition

Not a problem Bill,



There is a "how to" guide on the web somewhere that shows you how to modify the distributor to accommodate two pick up coils. It was pretty simple matter of making a 1/4" piece of aluminium plate into a circle and drill/tap a few 8-32 holes. And dropping into the distributor.



Then of course 4 wires would come out to drive 2 TP45 modules.



I mounted 3 TP45 modules on a plate bolted to the firewall. The idea was if either of the two modules went "phut" away from home then it was a simple matter to unplug the dead module and reconnect to the spare.



Never needed to though in 500 hours.



Frank



Cell/Mobile +1 541 602 8756

Tel +1 541 715 7568

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paulm(at)olypen.com
Guest

Posted: Sun Feb 27, 2011 7:11 pm Post subject: Bad ignition

I suspect its my document. Its on a web site (I forgot which) but I can send 

a copy to any who want one.



If you only need a single ign then its eaven simpler just replace the pickup 

using the already there screws and holes.



Paul

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frank.hinde(at)hp.com
Guest

Posted: Sun Feb 27, 2011 7:32 pm Post subject: Bad ignition

Thanks paul..yes your mod worked well on my airplane.



One correction though..The pickup "Should" be fine in this case..I.e its usually the amplifier chip that goes belly-up, but the pickup itself is usually just fine.



This is good news because the ignitor chip is the easy part to replace with a TP45, for $30 or so.



Cheers



Frank

Cell/Mobile +1 541 602 8756

Tel +1 541 715 7568

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steerr(at)bellsouth.net
Guest

Posted: Mon Feb 28, 2011 5:45 am Post subject: Bad ignition

Thanks again, Paul and Frank.  I Google'd for "Dual dizzy" or some 

similar phrase, and found a rather detailed article.  The part that 

concerned me was that it looked like some fairly precise machining was 

necessary on the plate.  I think I'll go with the single for now.



Bill

On 2/27/2011 10:20 PM, Hinde, Frank George (Corvallis) wrote:

[quote] 



 Thanks paul..yes your mod worked well on my airplane.



 One correction though..The pickup "Should" be fine in this case..I.e its usually the amplifier chip that goes belly-up, but the pickup itself is usually just fine.



 This is good news because the ignitor chip is the easy part to replace with a TP45, for $30 or so.



 Cheers



 Frank

 Cell/Mobile +1 541 602 8756

 Tel +1 541 715 7568

 --

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