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Postby lazair » Mon Mar 15, 2004 10:59 pm

Thx to Rob Kerr for this ,
http://www.wildfire-equipment.com/index.cfm

Tech-Note 1: Mark-3 Electronic Ignition
user posted image

A more efficient and maintenance free electronic ignition system


Since the introduction of the MK-3 fire pump into the industry, the MK-3 utilized breaker points in its ignition system, which inherently required maintenance; i.e. the gap adjustment, points cleaned and/or completely changed.



The upgrade to the electronic ignition system will eliminate the need for regular maintenance associated with breaker points. The electronic ignition system uses a magnetic pickup located on the flywheel, which when passing over a certain point on the stator will induce a high voltage, therefore causing the spark plug to fire at the proper moment.



The electronic ignition module is equipped with spark advance, thus allowing for a cleaner burn at a higher RPM. During testing it was found that the engine ran smoother and was much more responsive. When the engine is started cold, it runs rough (as if the timing were off) for about 15-30 seconds, after which the engine runs smooth.



In order to convert a MK-3 from breaker points to the upgraded electronic ignition system, the following retrofit kit was created:



B-7595 : Mark-3 Conversion kit, point to CDI





The ignition cable is larger in diameter than the previous one used on the MK-3 with breaker points.



The breakdown of the electronic ignition is depicted in the picture a the bottom. The electronic module is placed in an aluminium box located on the frame below the carburetor shroud.



1: Stator

2: Flywheel

3: Magneto Flywheel Assembly

16: Electronic Box

17: Protection Cap

18: Ignition Cable

19: Spark Plug Connector

20: Spark Plug

user posted image




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Postby rcflyer » Wed Aug 11, 2004 8:59 pm

Fantastic Info.... I will give Wildfire a call. Have purchased parts from them before and did not know they sold a retro kit to get rid of the old points system.

Great news!!! Has anyone out there installed this kit?

Thanks
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Postby Guest » Wed Aug 11, 2004 10:55 pm

rcflyer @ Aug 11 2004, 08:59 PM wrote: Fantastic Info.... I will give Wildfire a call. Have purchased parts from them before and did not know they sold a retro kit to get rid of the old points system.

Great news!!! Has anyone out there installed this kit?

Thanks


Don't get all excited just yet ! Wait until you get a price quote. After that you will find those old cheap points look pretty good !
Guest
 

Postby Guest » Thu Aug 12, 2004 10:17 am

Don't get excited. The cost of this conversion is totally prohibitive. More trouble than it's worth too.
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Postby rayjb60 » Sat Aug 14, 2004 11:33 am

CDI ignition is a great idea. especially for reliability in aircraft engines...but at $300 each, it seems expensive.

Theres only about $35 in parts cost for a CDI ignition, so perhaps we can make them for much cheaper.

I'll bet if an enterprising Lazair fanatic made these available for about $150 each, then virtually every Lazair fanatic would want two right?

Any comments on issues for CDI ignitions in general?

I guess the spark advance is related to rpm on a curve in internal software....it would be cool to be able to select from a number of curves for optimum performance......

Hmmmmmm......couldnt be that hard to do. :rolleyes:
<H5>Nothing is impossible...Even the word tells you Im-Possible!!!</ H5>
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