Is the engine not turning over when the key is turned? No spark?
Do you mean the sheer key on the flywheel?simplest way is to bi pass all safetys by determining where they are normally open or closed switches and work accordingly next step is to turn on switch and check for power going to coil if have power check points for dirt or adjustment but while you are there check sheer key if sheer key is broke wont get spark at all or intermittent spark
Engine is turning over great with the key. Just no sparkIs the engine not turning over when the key is turned? No spark?