Ingition light on my old gazelle stays on when the engine is running, but it did not work when i got the mower, There is a small bulb looks like a small xmas tree bulb that had blown so just replaced it.
Have you tried ajusting the points on my old mower they are set at 20 thou ...sorry old school for me :>
You have to remove the rip start cover and then the fly wheel and a small plate which is held in place by three small screws.
my mower is the 8 HP version so your setting maybe different to mine but it may tell you what the settings are, I had problems starting it but as soon as i reset the points ..hey presto all good now.
Hope this helps
Dave
June 2009