When I initially start my ms it has a VERY loud "screaching" sound that stops after about 2 seconds when the engine gets going. The "screaching" sound appears to becoming from the motor. I have ascertained this by putting my ear up to the motor and it is loudest there. Anyone have any suggestions? I am a DIYer so the saw gets minimal use. I did do a lot of starting and stopping with the saw the previous day while I was notching out some 6 X 6 pt landscape timbers. Thank you in advance for your assistance.