Recently got out my brand new Moki 180 Gas Ignition to put in a 85" Gee Bee Y. I set it up on a test stand with the spark plug removed so I could see the spark occurring. Didnt matter what I tried I could not get a spark out of it, so moved on to a lateral approach. I found an old bar magnet that I had and manually passed that over the sensor (which I had removed from its mounting on the motor) - guess what - a nice fat spark, so thinking that it may be gap related I passed the sensor over the magnet mounted in the prop driver - NO SPARK.
Next move was to obtain some small rare earth magnets and try these - I manually passed one across the sensor and was rewarded with a big fat spark, all this did was to frustrate me even more as the system appears to work but when all mounted on the motor - Nothing.
Anyway to make it easier to hold the small rare earth magnet I got a small pieace of timber and drilled a hole to mount the magnet. Once done I then tried it across the sensor yet again and guess what NO SPARK now this was the same magnet that worked not 30 minutes before, SUDDEN THOUGHT I turned the magnet end for end mounted it back in the timber and once again passed it over the sensor - NICE BIG FAT SPARK.

It would appear that although a magnet may be magnetised and able to attract onther metalic items its "force field" does have direction.

So now I have mounted a second magnet in the prop driver which gives me a nice fat spark I will be able to test run this motor at the weekend.

Hope this helps someone out there.

RJM