Craftsman 636.796912 Owner's Manual page 9

Table 2
_J
Engine
overheated
lrn ro er fuel used Use fuet with correct mixing ratio,
'- P P ' ".............. Never use ga=oline of poor quality,
I Spark plug defective Re_t._ _
------- (burnt) ................................ _.,....
As cooling fi_s clog, air ^. f,
--" does not pass well ................... _lean ms,
/ Excessive deposits in 0t m-" n- L
L-.--_ combustion chamber .......... ' ...... sasse ote a o remove caroono
Firing funcdon
defective
! Plug damaged or fouled ........... Replace or clean,,
F----
; L.--- Combustion poor due to Check wiring,
: defective wiling ...................
Carburetor
defective
Other
troubtes
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,