MTD 604 manual Carburetor Adjustment, Front to Rear

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With the tractor parked on a firm, level surface, place the lift lever in the top notch (highest position) and rotate the blade nearest the discharge chute so that it is parallel with the tractor.

Measure the distance from the front of the blade tip to the ground and the rear of the blade tip to the ground. The first measurement taken should be between 1/4" and 3/8" less than the second measurement. Determine the approximate distance necessary for proper

adjustment and proceed, if necessary, to the next step.

Loosen the two jam nuts on the rear side of the deck stabilizer bracket. See Figure 8A.

Locate the two lock nuts on the opposite side of the stabilizer bracket. See Figure 8A. Tighten the lock nuts to raise the front of the deck; loosen the lock nuts to lower the front of the deck.

Retighten the two jam nuts loosened earlier when proper adjustment is achieved.

Side to Side

If the cutting deck appears to be mowing unevenly, a side to side adjustment can be performed. Adjust if necessary as follows:

WARNING: Turn the tractor’s engine off, remove the key from the ignition switch and apply the tractor’s parking brake before making any adjustments.

With the tractor parked on a firm, level surface, place the lift lever in the top notch (highest position) and rotate the both blades so that they are perpendicular with the tractor.

Measure the distance from the outside of the left blade tip to the ground and the distance from the outside of the right blade tip to the ground. Both measurements taken should be equal. If they’re not, proceed to the next step.

Loosen, but do NOT remove, the hex cap screw on the left deck hanger bracket. See Figure 8B.

Balance the deck so that both blade tip measurements taken earlier are equal.

Retighten the hex cap screw on the left deck hanger bracket when proper adjustment is achieved.

A

Deck

Stabilizer

Bracket

Deck

Lock Nuts

Jam Nuts

B

Hex Cap Screw

Deck Hanger Bracket

Front to Rear

Side to Side

Figure 8

CARBURETOR ADJUSTMENT

WARNING: If any adjustments are made to the engine while the engine is running (e.g. carburetor), disengage all clutches and blades. Keep clear of all moving parts. Be careful of heated surfaces and muffler.

NOTE: A dirty air cleaner will cause an engine to run rough. Be certain it is clean and properly attached before adjusting carburetor. Refer to separate engine manual packed with your unit for information regarding air cleaner maintenance.

Refer to separate engine manual packed with your unit for carburetor adjustment information or see an authorized engine service dealer.

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Contents OPERATOR’S Manual Table of Contents Finding Your Model NumberCalling Customer Support General Operation Important Safe Operation PracticesChildren ServiceSlope Operation Do notSafety Labels found on your unit Slope Gauge Tractor SET-UP Attachments & AccessoriesAttaching the Battery Cables Installing the Mulch KITControls Choke Control Ignition SwitchIndicator Monitor / Hour Meter Throttle Control LeverBrake Pedal Electric PTO Power TAKE-OFF KnobPTO Power TAKE-OFF Lever Autodrive PedalSafety Interlock Switches Shift LeverCruise Control Button Stopping the Engine Setting the Cutting HeightSetting the Cruise Control Starting the EngineUsing the Lift Lever Driving on SlopesOperating the Headlights Leveling the Deck AdjustmentsEngaging the PTO MowingFront to Rear Carburetor AdjustmentSeat Adjustment Steering AdjustmentBrake Adjustment Maintenance EngineChanging Engine Oil Cutting Deck Removal Cleaning the Engine and DeckChanging the Deck Belts Decks w/ Electric PTOInch decks w/ manual PTO Upper Drive Belt Changing the Transmission Drive BeltsFront of Tractor Lower Drive Belt Cutting Blades Charging BatteryTires FuseLubrication Trouble Possible Corrective Action Causes Troubleshooting GuideModel Part Description Tractor BodyModel Lift Assembly Model Steering Assembly Model Drive System 31 30 12c Single-speed Transmission PTO belt for 42 deck shown 783-0349 Battery Tray 783-0891A Deck Stop Power Take-off SystemInch Deck †46-inch Deck Brake AssemblyCutting Decks Model Briggs & Stratton Intek Single Engine AccessoriesElectrical System Page MANUFACTURER’S Limited Warranty for