Coil question

[danfl]

I am trying to help out a friend. He has a Kawasaki Mule 500. It will start up and run for a few minutes. Once you put a load on it it will run rough and cut out. It is run longer at idle. It is not fuel related, it is electrical. We know because there was no spark afterwards. We are 85% sure it is the coil. But there is something called an igniter. Does anyone know what this is? We think once the engine starts the igniter does not play a role in anything. Can anyone help? We are thinking the coil gets hot and does not produce a spark. Once it sits for sometime it will start up and do the samething.

Dan