Couple times now the starter will just 'grind' and not turn the motor over. Usually the next time I hit it, it goes. But once it ground for 3-4 tries before turning over. Its a CSI Platinum (hitachi style) mini starter thats probably 6-7 yrs old. Is this a sign of something going bad in the solenoid or? Its almost stranded me in the lanes before eliminations. Need to fix it.