Originally Posted by ChuckPMi
<<I did test for the spark when cold and got a good healthy one; I didn't think of testing when hot, but now that might be a bit difficult as the engine won't run for more than about 30s - a minute.>>
You don't need the engine running to test for spark. I have an FS550 that won't start but it has strong spark. http://www.amazon.com/Tool-Aid-23970...rk+plug+tester
Since you generally test for a spark with the plug out (otherwise you can't see the right end of the plug), it'd be a bit difficult to test for it when the engine is running.