Craftsman 636.796912 owner manual Firing funcdon

Table 2

Engine overheated

Firing funcdon

_Jdefective

Carburetor

defective

Other

troubtes

lrn ro er fuel usedUse fuet with correct mixing ratio,

'-

P

P

'

"

Never

use ga=oline

of poor

quality,

I

Spark

plug

defective

Re_t._ _

-------

(burnt)

................................

_.,....

As

cooling

fi_sclog, air

^.

f,

--"

does

not

pass well

...................

_lean

ms,

/

Excessive

deposits

in

'

0t

m-"

n-

remove

L

L-.--_

combustion

chamber

sasse

ote

a

o

caroono

!

F----

Plug

damaged

or fouled

...........

Replace

or clean,,

; L.---

Combustion

poor

due

to

Check

wiring,

:

defective

wiling

...................

Needle

setting

..... ,............. Readiust,,

=_C_ inc°trect

Carburetor

overflow

Refer

to Table

1,

Air

cleaner

clogged

Clean

a_ necessary,,

Compression

insufficient

Disassemble, check and replac_

{piston

ring

stuck

or

if necessary,

worn

out)

_--

Cylinder

chrome

plating

Replace

cylinder,

peeled

or worn

out

Exhaust

port

clogged

with

carbon

........................

Clean

as nec_ssary_

Throttle

is not

fully

Readiust,