Specifications

19
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PROBLEM POSSIBLE CAUSE SOLUTION
Engine
surges,
hunts or runs
unevenly
Fuel level too low,
running out of gas
can cause speed
variation(hunting)
for a while before
enginequits
Checkfuellevel,addfuelifneeded.
Fuelqualityissueor
restriction
Refer to Engine will not start, stay running or
only runs when choked steps 5,6,12 & 13 under
Starting Problem/Engine under Troubleshooting.
Sparkarrestordirty
or clogged
Cleansparkarrestor,refertoSpark Arrestor under
Maintenance.Runenginebrieflywithoutspark
arrestor to verify that was the cause. Reassemble
sparkarrestortomuffler.Ifscreenisdamaged
replacesparkarrestorifscreenisdamaged.
IMPORTANT:Theseproductsareequippedwith
spark-arrestingmufflers.Itislegallyrequiredin
the state of California. It is a violation of California
statutes section 130050 and/or sec tions 4442 and
4443 of the California Public Re sourc es Code,
unlesstheengineisequippedwithasparkarrester,
as defined in section 4442, and maintained in ef fec-
tiveworkingorder.Sparkarrestersarealsorequired
on some U.S. For est Service land and may also be
legallyrequiredunderotherstatutesandordinanc-
es.
Stretched or miss-
ing governor spring
(small)
Replace spring, refer to Governor Linkage under
Breakdowns.
Governor spring
(large)isconnected
to wrong hole in
governor arm
Try different connection holes in governor arm.
Refer to Governor Linkage under Breakdowns.
Gasleaks Gasisleakingfrom
fuel valve
Fuel valve may be loose, tighten securing nut while
holding valve in proper orientation. If valve still
leaks,valvemaybefaulty,replace.
Gasisleakingfrom
fuel line
Ensuretherearenosplitsorwearmarksongas
line and ends are securely attached to fittings.
Gasisleakingfrom
carburetor the float
needle may be
stuckopen
Remove float bowl and clean thoroughly. Remove
float needle and clean needle and bore where
itlocates.Reassembleandcheck.Ifstillleaks,
replace carburetor. Refer to Carburetor under
Breakdowns.
Carburetor floods
while transporting
Fuel valve must always be placed into the OFF
position when transporting.
Gascapleakswhen
transporting
Gas should not be above shoulders of debris
screen,refertoengineinstructionmanual)Non-
Californiaenginesareequippedwithventedcaps,
asmallamountofgaswillleakifunitistippedata
steep angle and held there. If a large amount of gas
leaks,ensuretherubbergasketundercapispres-
entandthematingsurfaceofthetankissmooth
and flat. If >0.1 mm feeler gauge can fit under
straightedgeatanypoint,replacetank.
PROBLEM POSSIBLE CAUSE SOLUTION
Gasleaks
(continued)
Gasleakswhen
removing gas cap
and pressure can
be heard escaping
as cap is removed
(non-California
enginesonly)
Gas cap is not venting properly. Replace gas cap.
High oil
consumption
and/or oil
dripping from
air cleaner
orsparkplug
fouled with
carbon
Breather valve miss-
ing or damaged
Removecylinderheadcoverandlookfordiscvalve
just inside of breather hose. This disc must be free
toopenorcloseoffopening.Ifstuckinoneposition
or completely missing, replace cylinder head cover
assembly.
PERFORMANCE PROBLEM
PROBLEM CHECK RESULT SOLUTION
Engine:
Lackspower
Overheats
Surges or runs
unevenly
Vibration or noise
level is excessive
Testsparkplugfiring Nospark See Ignition Test.
Sparksinconsistently See Speed/
Governor
Adjustment.
Examinesparkplug
condition
Sparkplugisdry See Carburetor/fuel
delivery trouble-
shooting.
Sparkplugiswet: Checkcompression
Compression Poor compression See Compression
Test.
Good Compression Checkfuelcondition
Checkfuelcondition Poor fuel See Fuel System
under Maintenance.
AdequateFuel See Oil Alert Test.

RECOIL STARTER
PROBLEM CAUSE SOLUTION
Engine does not turn
over correctly
Starter cord cut Disassemble and replace
starter cord
Returnspringbroken Replace or realign return
spring.
Ratchet assembly
malfunctioning
Replace ratchet