[CP241]

I use a timing light and used a neon paint to mark TDC on the top of the clutch cover. Doesnt have to be exact but you'll notice a huge difference when the motor quits. My G9 I found that timing/spark got erratic or quit completely once it died. Let it sit a few minutes and it should run and quit again after a minute.

Is your ignitor OEM or aftermarket? I would lean toward ignitor as being the problem, more so if its aftermarket.