Hi Mark - You won't believe this! After 2 frustrating years of trying find a solution to the JD deck blowing out leaves, talking to the dealer, DEALER EVEN PICKED UP THE TRACTOR TO TEST IT, talking with John Dear direct about the problem and numerous JD parts dealers I found my answer purely by accident. I was searching Google for any kind of motor assist for bagging up leafs and I came across a Front Blowout Baffle plate for JD 42" mower deck. Does this make any sense? - the deck is already pre-drilled to accept the exact positioning of the four bolts that attach the baffle plate to the front edge of the deck. JD is obviously aware of the problem but doesn't include the baffle plate when you purchase the deck. (Cost me $38.00 which included S & H)
Since I have attached the plate not one leaf blows out from the port side of the deck - go figure!
Paul R.