Poulan 1990-10 User Manual - Page 19

5.

HIGH

SPEED

MIXTURE

ADJUSTMENT

Adjustments

as

small

as

1/16

of

a

turn

can

affect

engine

performance.

It

is

hn-

portant

to

turn

the

screw

only

1/16

of

a

turn

per

adjustment

and

test

the

performance

of

the

saw

before

making

further

adjustments.

a.

Make

a

test

cut.

b.

Adjust

the

High

Speed

Mixture

Screw

1/16

of

a

turn

as

follows:

—

Clockwise

if

the

saw

smokes

or

loses

power.

—

Counterclockwise

if

the

sawhas

speed

out

of

the

cut

but

lacks

power

in

the

cut.

c.

Repeat

test

cut.

d.

Continue

1/16

of

a

turn

adjustments

until

the

saw

runs

smoothly

in

cut.

e.

If

no

further

adjustments

are

necessary,

rein-

stall

the

pre

-filter.

Figure

41

.

A

too

lean

high

speed

setting

(clockwise

adjustment)

will

cause

engine

CAUTION:

CAUTION:

damage

to

any

2

-cycle

engine

from

over-

heating

and

lack

of

lubrication.

Never

set

the

high

speed

mixture

screw

so

far

clock-

wise

that

you

have

high

speed

but

lack

pow-

er

while

cutting.

An

effective

approach

fol-

lows.

—

Turn

screw

counterclockwise

until

engine

loses

power

while

cutting.

—

Then,

turn

screw

clockwise

in

1/16

of

a

turn

in-

crements

only

until

the

engine

has

power

while

cutting.

—

This

saw

has

a

governor

to

protect

the

engine

from

over

revving;

however,

a

too

lean

setting

will

still

damage

the

engine.

NOTE:

If

the

unit

will

not

operate

properly

after

making

these

adjustments,

take

the

saw

to

a

quali-

fied

service

dealer.

E

AIR.

FILTER

•

•

A

dirty

air

filter:

-

reduces

cutting

power.

—

increases

fuel

consumption.

•

Clean

the

air

filter:

—

frequently,

especially

under

very

dusty

condi-

tions.

—

always

after

10

tanks

of

fuel

mixture

or

5

hours

of

operation,

whichever

is

less.

1.

Clean

off

the

air

filter

cover

and

the

area

around

it

to

keep

dirt

and

sawdust

from

falling

into

the

en-

gine

when

the

cover

is

removed.

2.

Loosen

the

air

filter

cover

screws

and

remove

the

air

filter

covet

Figure

43

.

3.

Using

a

screwdriver,

remove

the

air

filter

from

the

air

filter

cover.

Figure

43

.

4.

Wash

the

filter

in

soap

and

water.

CAUTION:

Do

not

use

gasoline

or

other

fl

am-

mable

liquid

to

clean

the

filter

to

avoid

creating

a

fire

hazard.

5.

Reverse

steps

1.

through

3.

to

reassemble

parts.

NOTE:

This

saw

is

equipped

with

a

pre

-filter.

Clean

the

pre

-filter

as

follows:

a.

Insert

the

tip

of

a

small

screwdriver

into

the

hole

in

the

pre

—filter.

Figure

41.

b.

Push

the

pre

—filter

forward,

then

remove

the

pre

-filter

from

the

engine.

Air

Filter

Air

Filter

Cover

a

11

Figure

43

c.

Wash

the

pre

-filter

in

soap

and

water.

CAUTION:

Do

not

use

gasoline

or

other

fl

am-

mable

liquid

to

clean

the

pre

-filter

to

avoid

creating

a

fire

hazard.

d.

Reinstall

pre

-filter

in

engine.

Figure

41

.

CAUTION:

To

avoid

damage

to

the

engine,

do

not

operate

the

unit

without

the

pre

-filter

and

air

filter

in

place.

G.

STORAGE

When

your

saw

is

to

be

stored

for

over

30

days,

always:

1.

Drain

fuel

tank

in

a

safe

manner.

See

"FuelingYour

Engine

—Fuel

Safety."

2.

Start

engine

and

allow

to

run

at

idle

speed

until

the

engine

stops.

NOTE:

Running

the

engine

until

it

stops

will

re-

move

most

of

the

fuel

from

the

fuel

system.

NOTE:

It

is

important

to

prevent

gum

deposits

from

forming

in

essential

fuel

systems

parts

such

as

the

carburetor,

fuel

filter,

fuel

hose,

or

tank

during

storage.

Alcohol

blended

fuels

(called

gasohol

or

using

ethanol

or

methanol)

can

attract

moisture

which

leads

to

separation

and

formation

of

acids

during

storage.

Acidic

gas

can

damage

the

fuel

sys-

tem

of

an

engine

while

in

storage.

3.

Drain

oil

from

oil

tank.

CAUTION:

Wear

protective

gloves

when

han-

dling

the

chain.

The

chain

is

sharp

and

can

cut

you

even

when

it

is

not

moving.

4.

Remove,

clean,

and

dry

the

bar

and

chain.

5.

Store

the

chain

in

a

container

filled

with

oil

to

pre-

vent

rust.

6.

Apply

a

coating

of

oil

to

the

entire

surface

of

the

bar

and

wrap

it

in

heavy

paper,

cloth,

or

plastic.

7.

Clean

the

outside

surfaces

of

the

engine.

8.

Store

the

saw

in

a

dry

place,

out

of

the

reach

of

chil-

dren,

and

away

from

where

fuel

vapors

can

reach

open

flames

from

hot

water

heaters,

electric

mo-

tors

or

switches,

furnaces,

etc.

-!19

-

Poulan 1990-10 User Manual - Page 19

Filter, Storage

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