Kohler SH265

17
Troubleshooting
Ifenginetroublesareexperiencedthatappeartobe
fuel system related, check the following areas before
adjusting the carburetor.
 • Makesurethefueltankislledwithclean,fresh
gasoline.
 • Makesurethefueltankcapventisnotblocked
and that it is operating properly.
 • Makesurethefuelshut-ovalveisfullyopen.
 • Makesureoilisatcorrectlevel.
 • Makesurefuelshut-ovalvestrainer,andin-line
fuellter(ifused)arecleanandunobstructed.
Cleanorreplaceasnecessary.
 • Makesurefuelisreachingthecarburetor.This
includes checking the fuel lines and components
for restrictions or problems. Replace as necessary.
 • MakesureOn-Oswitchisfunctioningproperly.
 • Makesuretheaircleanerelementiscleanandall
air cleaner components are fastened securely.
If,aercheckingtheitemslistedabove,theengineis
hard to start, runs roughly, or stalls at low idle speed,
it may be necessary to adjust or service the carburetor.
Carburetor Troubleshooting and
Adjustments
NOTE: Carburetoradjustmentsshouldbemadeonly
aertheengineisatoperatingtemperature.
The carburetor is designed to deliver the correct
fuel-to-air mixture to the engine under all operating
conditions. The idle mixture is set at the factory and
normally does not require adjustment.
NOTE: To ensure correct engine operation at
altitudesabove1525meters(5000.),itmay
be necessary to have an authorized Kohler
dealer install a special high-altitude jet kit in
thecarburetor.Ifahigh-altitudekithasbeen
installed, the engine must be reconverted to
the original jet size, before it is operated at
lower altitudes, or overheating and engine
damage can result.
Iftheengineishardtostart,runsroughly,orstallsat
low idle speed, it may be necessary to adjust or service
thecarburetor.Enginemustnotexceed3850±100
RPMifthehighspeedscrewisadjusted.SeeFigure25.
Figure 25. High Speed Screw.
Screw