How To Use Your Lawn Mower; Blade Control; Throttle/Engine Control - Husqvarna 55B21HV Owner's Manual

The operation of any lawn mower can result in foreign objects thrown into the eyes, which can result
in severe eye damage. Always wear safety glasses or eye shields while operating your lawn mower or
performing any adjustments or repairs. We recommend standard safety glasses or a wide vision safety
mask over spectacles.

HOW TO USE YOUR LAWN MOWER

THROTTLE / ENGINE CONTROL (See Fig. 5)
The engine is controlled by a throttle control located on
the side of the upper handle. Choke position is for starting
a cold engine; fast position is for starting a warm engine,
normal cutting, trimming and better grass bagging; SLOW
position is for light cutting, trimming and fuel economy, and
STOP position is for stopping the engine.
FAST
CHOKE
BLADE CONTROL (See Fig. 6)
CAUTION: When the blade control is
engaged, the blade turns. When the
blade control is disengaged, the blade
stops.
• Your lawn mower has a blade/brake clutch fastened to
the engine crank shaft, which starts or stops the blade.
To start the blade, hold the operator presence control
bar down to the handle and push the blade/brake control
lever forward until it latches. To stop the blade, release
the operator presence control bar.
Do not start the blade in deep, uncut grass. Move lawn
mower out of uncut grass before starting blade.
CAUTION: Federal regulations require
this blade/brake control to minimize the
risk of blade contact injury. Do not under
any circumstances attempt to defeat the
function of this control.
OPERATION
SLOW
STOP
FIG. 5
OPERATOR PRESENCE
CONTROL BAR
TO
ENGAGE
BLADE
DRIVE CONTROL (See Fig. 7)
• Self-propelling is controlled by hold ing the operator
presence control bar down to the handle and pulling
the drive control lever rearward to the handle. The
farther toward the handle the lever is pulled, the faster
the unit will travel.
• Forward motion will stop when either the operator pres-
ence control bar or drive control lever are released. To
stop forward motion without stop ping blade, re lease the
drive control lever only. Hold op er a tor presence control
bar down against handle to con tin ue mowing without
self-propelling.
NOTE: If after releasing the drive control the mower will
not roll backwards, push the mower forward slightly to
disengage drive wheels.
OPERATOR PRESENCE CONTROL BAR
ADJUSTMENT TO ENGAGE
BUTTON (ON DRIVE
UNDERSIDE)
CONTROL
DRIVE CONTROL ADJUSTMENT (See Fig. 7)
Over time, the drive control system may become "loose",
resulting in decreased speed. There is a button on the
un der side of the drive control housing to increase tension
on the drive cable. Pro ceed as follows:
1. Turn unit off and disconnect spark plug wire from spark
plug.
2. Pull out button on underside of drive control, then push
it back in.
3. Operate mower to test drive speed. If there is no
increase, your drive belt is worn and should be re-
placed.
7
BLADE / BRAKE
CONTROL LEVER
BLADE
DISENGAGED
FIG. 6
DRIVE
CONTROL
LEVER
DRIVE
CONTROL
DISENGAGED
FIG. 7