TM 3-4230-218-12&PTableMALFUNCTION3-1.Operator Troubleshooting - ContinuedTEST OR INSPECTIONCORRECTIVE ACTION2.ENGINE RUNS ROUGHLY OR STOPS - Continued.StepStepStepStepStep2.Check for loose spark plug lead.If spark plug lead is loose, reattach lead to spark plug.If spark plug lead is tight, proceed to step 3.3.CheckIf choke isIf choke is4.Checkthat choke is open.closed, open choke.open, proceed to step 4.that fuel is flowing from fuel can into carburetor andinspect for leaking hose.If fuel is not flowing into carburetor, squeeze ball pump to breakvapor lock.If hose leaks, notify organizational maintenance to replace defectivehose.If fuel is flowing into carburetor and hose does not leak, proceed tostep 5.5.Check for loose fuel line fittings.Check that all fittings, including ball pump, are tight to prevent airfrom entering engine fuel lines.If fuel lines are cut or damaged notifyreplacement.If fuel lines are acceptable, proceed to6.Check for clogged air filter.organizationalstep 6.maintenance forIf air filter is clogged, notify organizational maintenance.If air filter is not clogged, proceed to step 7.Step 7.Check for contaminated fuel and fuel filter. Water contamina-tion will make the filter appear cloudy.If fuel is contaminated, remove existing fuel can and install new fuelcan with uncontaminated fuel.3-4
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