RE: CRRC50 Spark Plug
Hi Jim,
To me, it sounds like your throttle plate isn't open enough to start the engine. Do you still have the idle adjusting screw in the carb? Crank it down a bit and see if the butterfly is opening a bit. Also, check to ensure you have the needles set properly, 1 3/4 for the low speed needle, and 1 1/2 for the high.
DO NOT USE A 6 volt battery pack for the ignition, you will damage it. Stick to a 4.8 volt pack only.
Good luck ...
=R=