"RB" wrote in message
. ..
Refresh my memory, please: on a big twin blade mower, what is the problem
when there is an uncut strip in the middle of the deck as the mower goes
along.

Seems like it has to be either one or both blades shorter than it/they
should be.

The tips of my blades are the first to dull, so (in the case of dual blade
mowers) dull tips could cause an unmowed 'strip' to appear in the rear view
mirror.
Larry