TROUBLESHOOTING - See appropriate section

to a Sears

Parts

& Repair

 

Center.

 

PROBLEM

 

CAUSE

 

 

 

 

Does

not

start

1.

Dirty

air

filter.

 

 

 

 

2.

Out of fuel.

 

 

 

 

 

3.

Stale

fuel.

 

 

 

 

 

4.

Water

in

fuel.

 

 

 

 

5.

Spark

plug

wire

is

 

 

 

 

disconnected.

 

 

 

 

6.

Bad spark

plug.

 

 

 

 

7.

Throttle

control

lever not

 

 

 

 

in

correct

 

position

 

 

 

 

(if

equipped).

 

Loss

of

power

1.

Dirty

air

filter.

 

2.Buildup of grass, leaves, and trash under trimmer.

3.Too much oil in engine.

4.Walking speed too fast.

Excessive

 

1.

Lines

uneven

or broken.

Vibration

 

2.

Loose

nuts or bolts.

 

 

 

 

3.

Damaged

trimmer

head.

Starter

 

rope

1.

Bent

engine

crankshaft.

hard

to

pull

 

 

 

 

 

 

 

 

Loss

of

head

1.

Belt

not

driving.

 

drive

 

 

 

 

 

 

 

 

 

 

Hard

to

push

1.

Handle

 

height

position not

 

 

 

 

right

for

you.

 

 

Poor trimming

1. Trimmer line length is

performance

 

too

 

short.

 

 

 

 

 

2. Throttle control lever not

 

 

 

 

in

correct

position

 

 

 

 

 

(if

equipped),

 

 

Trimmer

head

1.

Trimmer

line

not

 

does

not

 

properly

installed.

 

retain

line

2.

Broken

 

line retainer

clip.

 

 

 

3.

Incorrect

size

of

 

 

 

 

 

trimmer

 

line.

 

 

in manual unless directed

CORRECTION

1.Clean/replace air filter.

2.Fill fuel tank.

3.Empty fuel tank and refill with fresh, clean gasoline.

4.Empty fuel tank and refill with fresh, clean gasoline.

5.Connect wire to spark plug.

6.Replace spark plug.

7.Move throttle lever to FAST position.

1.Clean/replace air filter.

2.Clean underside of trimmer and trimmer head.

3.Check oil level.

4.Trim at slower walking speed.

1.Check trimmer lines.

2.Check all hardware, including engine bolts.

3.Check/repair trimmer head.

1.Contact a Sears or other qualified service center.

1.Put belt on pulleys or replace belt if broken.

1.Adjust handle height to suit.

1.If line is worn or broken to half of original length,

replace line.

,Move throttle lever to FAST position.

1. Follow instructions in

Maintenance section.

2.Replace string carrier plate assembly,

3.Use .155 diameter trimmer line,

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Craftsman 917.77374 owner manual Correction, Parts, Problem, Does, Loss