I have a 24 hsp Craftsman Professional ELS Twin. Model 917.288700 and it will not start. I had to put the charger on it twice in the last 9 months but this time it won't even try to turn. No noise at all. The battery reads 14 volts. I through it on a slow charge anyway and still dead it will not turn over. Normally the flywheel will turn a little but it does not even try to turn over I am somewhat technical and know how to use a multimeter.