I have a Shindaiwa line trimmer model T230. Today the cutting attachment began to rotate at all times. It spins while idling, when I pull the starter cord, stops abrubtly as soon as I shut off. The owners manual says it's probably a broken clutch spring or a worn clutch spring boss. Is this a complicated deal or fairly easy to replace? I don't have a backup and if I take it into my dealer it will take a few days to get it done,(and I can't be without it for even a single day this time of year. If I can't fix it at night, I'll have to buy a new one and use this one,(2 years old), for a backup. Thanks for any info. P.S. Actually, if I won't cause severe damage by continuing to use it that's an option. It trims fine, just weird to have the head spinning constantly.