A friend is going to be borrowing the flail mower this weekend and he came by last night to check it out before we headed out to dinner. It was leaving a strip of uncut grass a bit left of center of the cutting head so I figured that a hammer was knackered. When I raised and rotated the head I saw that two hammers were stuck together due to a thick wad of grass and so weren't able to cut. Not sure if this is a common problem or not.
After clearing the grass and making sure that the two hammers were free to rotate I made a couple of short passes to see how it was doing, and all is good ... until the next time. You can see the strip of uncut grass in the photo below more to the right, and the much improved passes more to the left.
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