Craftsman 917.271061 owner manual Acceleration Test, Screw, To Adjust Carburetor

Page 26

o With engine not running, move throttle control lever from slow to choke

position. Slowly move lever from choke to fast position.

•Check to see if hole in throttle lever and hole in speed control bracket are aligned.

•If holes are not aligned, loosen cable clamp screw and align the holes by inserting a pencil or a 1/4" drill bit through both holes.

•Pull throttle cable up to remove slack and tighten cable clamp screw. Remove alignment pencil or drill bit.

Cable

Screw

Speed Control

Bracket

Throttle

Lever

TO ADJUST CARBURETOR

The carburetor has been preset at the factory and adjustment should not be necessary. However, minor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. If the carburetor does need adjustment, proceed as follows:

In general, turning the adjusting needles in (clockwise) decreases the supply of fuel to the engine giving a leaner fuel/air mixture. Turning the adjusting needles

out (counterclockwise) increases the

supply of fuel to the engine giving a richer fuel/air mixture.

IMPORTANT: Damage to the needles and the seats in carburetor may result if needle is turned in too tight.

NOTE: The carburetor on this engine is low emission. It is equipped with an idle fuel adjusting needle with a limiter cap, which allows some adjustment within the limits allowed by the cap. Do not attempt to remove the limiter cap. The limiter cap cannot be removed without breaking the adjusting needle.

•Be sure you have a clean air filter and the throttle control cable is adjusted propedy (see above).

•Start engine and allow to warm for five minutes. Make adjustments with engine running and shift/motion control lever in neutral (N) position.

•Idle speed setting - With throttle control lever in slow position, engine should idle at 1750 RPM. If engine idles too

slow or fast, turn idle speed adjusting screw in or out until correct idle is attained.

•Idle fuel needle setting - With throttle control lever in slow position, turn idle fuel adjustment needle in (clockwise) until engine begins to die and then turn out (counterclockwise) until engine runs rough. Turn needle to a point midway between those two positions.

•Recheck idle speed. Readjust if necessary.

ACCELERATION TEST -

•Move throttle control lever from slow to fast position. If engine hesitates or dies, turn idle fuel adjusting needle out (counterclockwise) 1/8 turn.

Repeat test and continue to adjust, if necessary, until engine accelerates smoothly.

High speed stop is factory adjusted. Do not adjust - damage may result. IMPORTANT: Never tamper with the engine governor, which is factory set for proper engine speed. Overspeeding the engine above the factory high speed setting can be dangerous, if you think the engine-governed high speed needs adjusting, contact your nearest AUTHO- RIZED service center/department, which has proper equipment and experience to make any necessary adjustments.

Idle Speed

Adjusting

Screw

Idle Fuel

Adjusting

Needle

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Contents £RIIFTSMFIN Repair Service Adjustments StorageLimited 90 DAY Warranty on Battery Parts Ordering Back CoverDo not General OperationSlope Operation ChildrenService Be alert and turn machine off if children enter the areaRepair Agreement Customer ResponsibilitiesShoulder To Remove Tractor from Carton Tools Required for AssemblyHOW to SET UP Your Tractor Before Rolling Tractor OFF SkidInstall Seat To Drive Tractor OFF SkidCheck Tire Pressure Check Brake SystemTo Convert to Bagging or Discharging Check Deck LevelnessR N H L Adjustment Knowyour TractorTo SET Parking Brake HOW to USE Your TractorTo Adjust Mower Cutting Height Backward StoppingTo Transport To Adjust Gauge WheelsTo Operate on Hills Shoulder Bolt Gauge WheelADD Gasoline To Start EngineBefore Starting the Engine Check Engine OIL Level Purge Transmission Automatic Transmission Warm UPMowing Tips Mulching Mowing TipsGeneral Recommendations Lubrication ChartMaintenance Schedule Before Each USEBlade Care TiresOperator Presence System Blade RemovalTransaxle Pump Fluid BatteryTransaxle Cooling BeltsTo Service PRE-CLEANER Clean AIR ScreenClean AIR INTAKE/COOLING Areas AIR FilterIN-LINE Fuel Filter CleaningHousing Guide Large To Remove MowerSIDE-TO-SIDE Adjustment To Install MowerTo Level Mower Housing Ground Line VI-ATo Replace Mower Blade Drive Belt To Adjust BrakeTransaxle Motion Control Lever Neutral Adjustment To Replace Motion Drive BeltTo Start Engine with a Weak Baiiery To Adjust Steering Wheel AlignmentFront Wheel TOE-IN/CAMBER To Remove Wheel for RepairsTo Replace Fuse To Replace Headlight BulbInterlocks and Relays Screw To Adjust CarburetorAcceleration Test Engine OIL EngineFuel System CylindersCause Correction Troubleshooting ChartProblem Tighten Troubleshooting Chart ProblemcauseCorrection Troubleshooting Chart Problem Cause Correction Cpdalup SchematicTractor - Model Number Electrical Tractor --MODEL Number DescriptionTractor - Model Number Chassis and Enclosures TRACTOR-- Model Number Chassis and Enclosures KEY Part DescriptionTractor - Model Number Ground Drive Tractor -- Model Number Ground Drive Tractor - Model Number Steering Assembly Shaft Assembly, L.H19272016 Optional Equipment KEY Part NO. no 162156 17720410 159420 16 STD551237 101 M73030800 105Tractor - Model Number Seat Assembly Wheels & Tires Tractor --MODEL NumberDecals Tractor - Model Number Lift Assembly Lift Inner Wire Assembly159471 130171116 Tractor - Model NumberMower Deck Tractor -- Model Number 6958 107 Hydro Gear Transaxle - Model Number @-+ Kohler ENGINE-MODEL Number CV15.5S, Type NumberNot Illustrated Blower Housing and Baffles KEY Part NO. NO. DescriptionAIR Intake KEY Part NO. NO. Description Crankshaft KEY Part NO. NO. DescriptionJ11 Fuel System KEY Part NO. NO. Description Ignition I Electrical OIL PAN / Lubrication Starting System KEY Part NO. NO. Description Kohler ENGINE-MODEL Number CV15.5S, Type NumberOIL PAN / Lubrication KEY Part NO. NO. Description Page Page Page Sighting Only Ride UP and Down HillNot Across Hill IuideRev 2.17.00 TR
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