Originally Posted by piston slapper
Sounds like there is a chunk missing in your hydro belt..
Belt has no gouges or anything at all missing. If it was the crank pulley keyway problem mentioned elsewhere wouldn't I be able to shake / move it on the output shaft?
This is perplexing me to no end. Literally the least bit of tension I put on the release chain the noise stops. I just don't see how the sound can travel that far through the chassis and sound like an engine noise, but I certainly hope it's a $40 idler pulley.
On a good note, if it is the engine I can find relatively low hour John Deere riding mowers in The Villages (piston slapper will know where I'm talking about) that have the same engine pretty cheap.