Toro TimeCutter ZS 4200S Operator's Manual page 25

Cutting Long Grass
If the grass is ever allowed to grow slightly longer than
normal, or if it contains a high degree of moisture, raise the
cutting height higher than usual and cut the grass at this
setting. Then cut the grass again using the lower, normal
setting.
Stopping
If the machine's forward motion must be stopped while
mowing, a clump of grass clippings may drop onto your
lawn. To avoid this, move onto a previously cut area with the
blades engaged or you can disengage the mower deck while
moving forward.
Keeping the Underside of the Mower
Clean
Clean clippings and dirt from the underside of the mower
after each use. If grass and dirt build up inside the mower,
cutting quality will eventually become unsatisfactory.
Maintaining the Blade(s)
Maintain a sharp blade throughout the cutting season because
a sharp blade cuts cleanly without tearing or shredding the
grass blades. Tearing and shredding turns grass brown at
the edges, which slows growth and increases the chance of
disease. Check the mower blades after each use for sharpness,
and for any wear or damage. File down any nicks and sharpen
the blades as necessary. If a blade is damaged or worn, replace
it immediately with a genuine Toro replacement blade.
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