I am having problems with my starter not turning the engine properly, the symptoms are strange: It grinds but the flywheel if not damaged The power drops to 8v, sometimes cutting the power to the stereo loosing presets etc... After about 2 to 3 seconds of grinding noise the car turns and starts straight away. It is a re-manufactured bosch starter The battery is brand new and capable of 670amps After the car is started I can stop it and it starts fine every time after, then if I let it sit for an hour the same thing happens! I thought it would be the solenoid getting a little stuck but I don't think that the motor would spin then! Please help I am very confused