I have the mower for 8 years and replaced very few drive belts (mainly deck belts), but recently I have replaced drive belts twice. When I engage the PTO, there is an initial slight pause, then a squealing noise before it begins the blades turning. Even after a short period, I have checked the belts to make certain they are engaged properly. The deck belts feel fine to the touch, but the drive belt (and front drive belt pulley) are very warm. I never had previously to feel the belts, so am not sure if this is normal or not. Just wondering if anyone might have any guidance to give. Thank you.