Strange Engine Noise
Ive got a 18.5 HP -42" riding mower that is making a terrible noise. While mowing I ran over a small branch that somehow managed to get above the deck and push the blade belt off one of the pulleys. Immediately I heard a knocking noise from the engine and I shut everything down. Upon inspection I saw the displaced pully but everything else looked fine so I went ahead and alligned the belt where it should have been. After restarting I continued to mow and managed to finish off my lawn just fine but the engine was still not sounding right and this is even when the blades are not engaged. Im not sure if something else is off aside from the belt I fixed or if the belt is not tensioned properly anymore (although the noise is present without the blades being engaged). Not sure how to describe the sound other than like a hollow metal knocking noise that is coming right from the engine. Any ideas on what could be going on?