Operating Tips - Exmark SD270SB20 Operator's Manual

Adjusting the Cutting Blade Depth
1. Bring the unit to a full stop.
2. Disengage the cutting blades.
3. Stop the engine and wait for all moving parts
to stop before leaving the operating position.
Disconnect the wire from the spark plug.
4. Unlock the cutting blade depth handle by pulling
upward.
Figure 10
1. Unlock
2. Cutting blade depth
handle
5. Move the lever to the desired working depth slot
setting. Rotate and push the handle down to lock
the handle.
6. The setting will need to be adjusted as the cutting
blades wear.
Adjusting the Seeding Rate Gauge
1. Bring the unit to a full stop.
2. Disengage the cutting blades.
3. Stop the engine and wait for all moving parts to
stop before leaving the operating position.
4. To change the seeding rate, loosen the knob on
the seeding rate gauge located on the front of
the seed hopper. Move the gauge pointer to the
desired position and retighten the knob.
3. Lock
1. Gauge pointer
Note: Refer to the seeding graph, located on the
machine, to determine the correct gauge setting for
the type of grass and the thickness to be planted.

Operating Tips

Over Seeding
When over seeding, set the cutting blades to be 1/8
to 1/4 inch (3 to 6 mm) into the earth.
Important: Do Not put down more seed than
recommended by the seed company. Over
seeding can cause the grass to be too thick and
cause it to be susceptible to fungus.
Note: The machine will seed at the same rate going
both forward and rearward.
Note: If there is excessive thatch, it may be necessary
to remove the thatch prior to seeding.
Dethatching
Set the cutting blades to be 1/8 to 1/4 inch (3 to 6
mm) past the thatch layer, into the earth. Operate the
machine over the yard with the seeder control lever
turned off.
Power Raking/Renovation
To break new ground or till an existing lawn, set the
cutting blades to be 1/4 to 1/2 inch (6 to 12 mm)
into the earth. Go forward and backwards over the
area to be leveled, or make multiple passes from
different directions.
The machine will work best when the ground is hard
and dry and will be most aggressive in breaking up
the soil in reverse. If the ground is soft and causes the
19
Operation
Figure 11