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When you say problem with the belt/pulleys, what issue could this be?

Any chance that spring is too loose? Is the bearing bad which is causing excessive vibration and thus rattling noise?

OK. I did a little more investigation. Took off plastic fan shrouds. No change. Then, I changed the throttle position and the noise seems to go away above idle. Meaning, I am only hearing this awful rattle noise in the video at idle. Any ideas? This can’t be normal, right?

Thanks. Yes, the noise goes away. It sorta oscillates between making sound and not. Engaging the blades doesn’t really seem to impact whether I hear the noise. It can go 5-10 mins with no noise but then bam, noise. Also, when I hear the noise I seem to see that bottom spring vibrating more. But...

Fairly new Tiger cat 2. 26 hours and it has made this noise since new. But, seems worse now. It sounds like it’s coming from bottom rear. Can anyone identify issue from the video? It’s a metal on metal rattling noise that comes and goes. Oil level is full and no other obvious issues. Performance...