Have a 2004 yard machine. When you turn key it blows the fuse

I had this very same problem on my yard machine. It is very hard to trace with a volt meter because fuse blows when you turn the key on. I would remove loom covering wire harness and inspect all wires, look for one that's worn through and grounded out. I inspected every inch of wire on my unit. I ended up removing flywheel and noticed magnets on inside of the flywheel had come loose and crashed in to stator coil causing unit to ground out immediately when key turned on. I reglued magnets to flywheel and replaced stator coil and my problem was solved. Good luck to you!

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