Service And Adjustments; Starting A Warm Engine/Starting A Flooded Engine; Cleaning The Air Filter; Replace Spark Plug/Replace Fuel Filter - Jonsered HT21 Instruction Manual

Jonsered ht21 hedge trimmer instruction manual
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NOTE:
If the engine still doesn't start, it
is probably flooded. Proceed to START-
ING A FLOODED ENGINE.
8. Once the engine starts, allow the engine to
run 10 seconds, then move the choke lever
to the OFF CHOKE position. Allow the unit
to run for 30 more seconds at the OFF
CHOKE position before squeezing and re-
leasing the throttle trigger to release the
throttle lock.
NOTE:
If engine dies with the choke le-
ver in the OFF CHOKE position, move the
choke lever to the HALF CHOKE position
and pull the rope until the engine runs, but
no more than 6 pulls.
STARTING A WARM ENGINE
1. Move the ON/OFF switch to the ON posi-
tion.
2. Slowly press the primer bulb 6 times.
3. Move the choke lever to the HALF
CHOKE position.
4. Engage the throttle lock as directed in
STARTING A COLD ENGINE.
NOTE:
Keep the throttle lock engaged until
the engine starts.
WARNING:
Ensure ON/OFF switch
is in the OFF position and disconnect the
spark plug before performing service except
for carburetor adjustments.
We recommend all service and adjustments
not listed in this manual be performed by an
authorised service dealer.
CLEAN AIR FILTER
Air Filter Cover

Cleaning the air filter:

A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation.
1. Clean the cover and the area around it to
keep debris from falling into the carbure-
tor chamber when the cover is removed.
2. Remove parts as illustrated.
NOTE:
Do not clean filter in gasoline or other
flammable solvent. Doing so can create a fire
hazard or produce harmful evaporative emis-
sions.

SERVICE AND ADJUSTMENTS

Air
Filter
Screws
5. Pull starter rope sharply until engine runs,
but no more than 5 pulls.
6. Allow the engine to run 10 seconds, then
move the choke lever to the OFF CHOKE
position.
7. Release the throttle lock by squeezing
and releasing the trigger.
NOTE:
If engine has not started, pull starter
rope 5 more pulls. If engine still does not run, it
is probably flooded. Proceed to STARTING A
FLOODED ENGINE.
STARTING A FLOODED ENGINE
Flooded engines can be started by placing
the ON/OFF switch in the ON position and the
choke lever in the OFF CHOKE position and
engaging the throttle lock as directed in the
STARTING A COLD ENGINE section; then,
pull the rope to clear the engine of excess
fuel. Starting could require pulling the starter
rope many times depending on how badly the
unit is flooded.
If the unit still doesn't start, refer to the TROU-
BLESHOOTING TABLE.
3. Wash the filter in soap and water.
4. Allow filter to dry.
5. Add a few drops of oil to the filter; squeeze
filter to distribute oil.
6. Replace parts.
REPLACE SPARK PLUG
Replace spark plug each year to ensure the
engine starts easier and runs better. Set
spark plug gap at 0,6 mm. Ignition timing is
fixed, nonadjustable.
1. Twist, then pull off spark plug boot.
2. Remove spark plug from cylinder and dis-
card.
3. Replace with Champion RCJ-8Y spark
plug and tighten with a 19 mm socket
wrench.
4. Reinstall the spark plug boot.
REPLACE FUEL FILTER
To replace fuel filter, drain unit by running it dry
of fuel, then remove fuel cap and its con-
nected retainer from tank. Pull filter from tank
and remove it from the fuel line. Install new
fuel filter on fuel line; reinstall parts.

CARBURETOR ADJUSTMENTS

Your carburetor is equipped with limiter caps.
Damage will occur if you turn the needles be-
yond the limiter caps. Carburetor adjustment
is a complicated task. We recommend that
you take your unit to an authorised service
dealer.
-- 7 --

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