"dave" wrote in message
oups.com...
it is a walk behind, not a tractor.

I only have 4 wheels, which are the 'guide wheels"?

Most mower decks have a wheel on each side (adjustable) that help support
the deck at a preset height. It sounds like those wheels are not adjusted
properly and the deck 'swings' on the corners. This will cause the grass to
be cut higher on the outside of the turn.