Jonsered HT 2121 Instruction Manual download pdf (Page 6)

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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 TROUBLESH OOTING TABLE.

SERVICE

WARNING:

Ensure ON/OFF switch

is in the OFF position and disconnect the

spark plug before performing maintenance

except for carburetor adjustments.

GENERAL RECOMMENDATIONS

The warranty on this unit does not cover items

that have been subjected to operator abuse

or negligence. To receive full value from the

warranty, the operator must maintain unit as

instructed in this manual. Various adjust-

ments will need to be made periodically to

properly maintain your unit.

CHECK FOR LOOSE

FASTENERS AND PARTS

Spark Plug Boot

Air Filter

Housing Screws

CHECK FOR DAMAGED OR

WORN PARTS

Contact an authorized service dealer for re-

placement of damaged or worn parts.

ON/OFF Switch -- Ensure ON/OFF switch

functions properly by moving the switch to the

OFF position. Make sure engine stops; then

restart engine and continue.

Fuel Tank -- Do not use unit if fuel tank shows

signs of damage or leaks.

INSPECT AND CLEAN UNIT AND

LABELS

Before and after each use, inspect com-

plete unit for loose or damaged parts. After

each use, clean the unit and labels using a

damp cloth with a mild detergent.

Wipe off unit with a clean dry cloth.

CLEAN AIR FILTER

Air Filter

Cover

Screw

Air Filter

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 carburetor

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 har mful evapor ative emis-

sions.

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.

INSPECT MUFFLER AND SPARK

ARRESTING SCREEN

NOTE:

THE SPARK ARR ESTING SC REEN

ON THIS UN IT IS NOT SER VICEABLE.

For normal homeowner use, the muffler and

spark arresting screen w ill not require any ser-

vice.

After 50 hours of use, we recommend that

your muffler be replaced by an authorized

service dealer.

CARBURETOR ADJUSTMENT

WARNING:

Keep others away when

making idle speed adjustments. The blade

will be moving during most of this procedure.

Wear your protective equipment and observe

all safety precautions. When making adjust-

ments, use a screwdriver short enough to

keep your hands behind the handguard and

away from the blade. After making adjust-

ments, the blade must not move at idle speed.

The carburetor has been carefully set at the

factory. Adjustments may be necessary if you

notice any of the following conditions:

Engine will not idle when the throttle is re-

leased.

The blade moves at idle.

Keep others away when making idle speed

adjustments. Make adjustments with the unit

resting on a level surface free of debris that

can be caught in the hedge trimmer blade.

Serious injury to the operator and others can

occur if the carburetor is not properly ad-

justed. Keep all parts of your body away from

the blade and muffler.

Idle Speed Adjustment

Allow engine to idle. Adjust speed until engine

runs without blade moving (idle too fast) or en-

gine stalling (idle speed too slow).

Turn idle speed screw clockwise to in-

crease engine speed if engine stalls or dies.

Turn idle speed screw counterclockwise to

decrease engine speed if the blade moves

at idle.

WARNING:

Recheck the idle speed

after each adjustment. The blade must not

move at idle speed to avoid serious injury to

the operator or others.

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Jonsered HT 2121 Instruction Manual Page 6

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