Check that the rivets that hold the outer ring to the inner ring haven't fallen apart. Everything should be tight, if not too much air gets into the mix. I replaced the cheap rivets with screws and lock washers. Did the trick for me. Outer ring may have sharp edges, handle carefully if removing the guards for better access.
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Check that the rivets that hold the outer ring to the inner ring haven't fallen apart. Everything should be tight, if not too much air gets into the mix. I replaced the cheap rivets with screws and lock washers. Did the trick for me. Outer ring may have sharp edges, handle carefully if removing the guards for better access.