Valve adjustment???

I believe that's exactly what's happening. For the past 2 days I've been driving it in the snow. Plus it's been real windy so snow has been blowing all over it too. Makes perfect sense.

Right now it's 12 degrees and the wind's blowing. Dumped 3 inches last night.
My tractor is stored indoors.



Yep the ice could be underneath to rubbing on one of the moving parts, pulley, etc.
 
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I forgot to add that it sounds like the noise is coming from the carburetor. You can especially hear it at the end of the video when I shut it down.
 
No thats not completely correct. 10w-30 means it was winter tested at zero degrees. 5w-30 means it was winter tested at -25 temperatures. The "W" stands for winter tested oil. 5w, 10w, 20w, etc. is all a multi visocity oil.

Motor Oil Viscosity Grades Explained in Layman's Terms

Regardless, it should still have 5W-30 in the winter.

This should have nothing to do with the oil anyway. The noise is mainly coming from the carburetor.
 
Actually they had some models that had adjustable valves. It could be a sticking valve, or noisy lifter, carbs cannot make noise.... Well, if you dropped one.....
 
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