I just got the 48"mower deck on my 1650 set for mowing today. It needed new blades & a bunch of excess steel cut off at the skids. The blades turn freely by hand & there is no play in the bearings. But when I turned on the pto, it sounds like a small crop duster. This is the first Massey/Snapper I have had & I am not familiar with the mower decks. I mainly collect Cub Cadets. There is no grinding or rubbing noise, it just sounds like a small prop plane. I had the belt covers off at first, & then I put the only one I have back on, but it didn't get any quiter. Is this normal? How loud are these decks when operating? It did an excellant job cutting, but loud. Let me know what anybody thinks. Thanks in advance.