Honda Harmony II HRR216PDA Owner's Manual page 26

OPERATION
When to Mow
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Most grasses should be mowed when they have grown to 1 inch
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above their recommended height. More frequent mowing is required
for mulching than for bagging. For best mulching results, you may
need to mow the lawn twice a week during the growing season.
Cutting Height
Consult a local nursery or lawn and garden center for cutting height
recommendations and advice about specific types of grasses and
growing conditions in your area.
Most grass has stems and leaves. If you cut off the leaves, you'll
scalp the lawn. Let the grass recover between mowings. Your mower
will work better, and your lawn will look better.
If your grass gets too tall, cut it once at the highest cutting height
setting, then mow again in 2 or 3 days. Don't take off more than one
third of total grass height in any one mowing, or brown patches may
develop. Cutting height adjustment is explained on page 10.
Cutting Width
For an even lawn finish, overlap each mowing swath by a few inches.
If the grass is very tall or thick, use more overlap and a narrower
mowing swath.
Blade Speed
The blade(s) must spin very fast to cut properly. Always use the
FAST throttle setting. If engine speed drops, it could mean the engine
is being overloaded by the blade(s) trying to cut too much grass. Mow
a narrower swath, move the mower slower, install the discharge
chute (HRS, HRT), or raise the cutting height.
Blade Sharpness
A sharp blade cuts cleanly. A dull blade tears the grass, leaving
shredded ends that turn brown. When your blades don't cut cleanly
anymore, have them sharpened or replaced.
Dry Grass
If the ground is too dry, mowing will stir up a lot of dust. Besides being
unpleasant to work in, too much dust will clog the air filter. If dust is a
problem, water your lawn the day before mowing. Mow when the
grass is dry to your touch, but the soil is still moist.
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