Cub 124
 

OK, odd issue I'm having today. When I go to start it, it will just turn over but if I pull plug wire off and jump spark it, will run but if I hook it up it kills it.

Examine spark wire and spark plug and replace if necessary. My guess is something's grounding the spark.

Wire and plugs are fine just don't understand how it will work if I jump spark on plug or coil it will start

Check points, when it is running does it throttle up?

If iam able to hold wire above coil to keep it running I can throttle up but now I think I lost spark altogether now

I'm going to start with changing out coil

Ignition coil testing info: https://www.onlycubcadets.net/forum/...highlight=coil

Like Lew says, I would inspect the points AND condenser, too!

Points
 

I think points are working opening and closing with spark

Ok so pulled plug got good spark but still will not start

OP has sent me a PM indicating he has replaced everything and has good spark but no start. So I'm bringing this back to forum for all to see and share their thoughts. Assuming fuel and compression is good, I think maybe timing is suspected:

Using timing light:
https://www.onlycubcadets.net/forum/showthread.php?t=14

Using a multimeter:
https://www.onlycubcadets.net/forum/...ead.php?t=4405