Briggs & Stratton MB (18 HP) Spark Plugs, Breaker Points, Replacing/Repairing, Belt Locations

Page 48

Maintenance Instructions

CHECKING/SERVICING/

REPLACING/REPAIRING

Spark Plugs

Every 100 hours, remove the spark plugs, inspect, clean, and reset the gap (or replace with a new plug). Clean spark plug with a wire brush. If the electrodes are burned short or pitted, replace the plug (refer to Specifications for the proper type of replacement plug). Check the spark plug gap with a wire-type feeler gauge and set the gap between 0.028 and 0.032 in. (0.7 and 0.8 mm). Reinstall and tighten to 17 ft-lb (23 N·m). Both spark plugs should be replaced yearly.

Breaker Points

The Briggs & Stratton engine is equipped with elec- tronic ignition. No breaker points, maintenance, or adjustments are necessary with this system. Con- tact an authorized Briggs & Stratton engine dealer in case of ignition failure.

Fuel Lines and Clamps

Every year, inspect the fuel line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness. Good preventive maintenance calls for complete replacement of fuel lines and clamps every two (2) years.

Blade Brake Action

WARNING

It is important to check and maintain blade brake action for safe operation of the ma- chine.

Check the function of the cutter blade brake by engaging the blade clutch (PTO), operating the engine at full throttle, then disengaging the clutch and measuring how quickly the blades stop. Watch the rotation of the blade drive shaft as a visual indi- cation that movement has stopped. If the brake is working properly, all rotation will stop five (5) seconds after disengagement of the clutch. If the brake system malfunctions -- blades do not stop in five (5) seconds -- repair the brake before operating the mower.

REPLACING/REPAIRING

DANGER

To prevent accidental starting of the engine when replacing parts or repairing the machine, remove the key from the ignition switch and disconnect the spark plug wires.

IMPORTANT: ALWAYS use genuine factory re- placement parts. Substitute parts CAN result in product malfunction and possible injury to the oper- ator and/or others.

Drive Belts

There are two (2) individual belts on the machine:

•Engine/PTO Belt

•Ground Drive Belt

The belts may be removed and replaced using the procedures described on the following pages.

Engine/PTO

Belt

Ground Drive Belt

Belt Locations

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Contents Illustrated Parts Manual Foreword Table of Contents Main Component Hydrostatic GroundSteering Control Assemblies Spread Tail Wheel Axle KITGeneral Information GlossaryIdentifying Number Locations Fill In By PurchaserServicing of Engine and Drivetrain Components Specifications EngineElectrical System TransmissionBlade Drive Tire SizeTire Pressure Mower Deck Drive BeltsSeat FRAME/BODY ConstructionComponent Identification Front View and Right Side ViewRear View and Left Side View Top View Body Raised Safety Instructions Before OperatingDo not mow with bystanders in the area Operating Maintenance Case of a clogged or plugged mower deckSafety Instructions SAFETY, CONTROL, and Instruction Decals SAFETY, CONTROL, and Instruction Decals Assembly Instructions Setup InstructionsBattery Service Deck Caster Wheel InstallationPTO Shaft Guard Installation Deck InstallationMower Deck Installation PTO Shaft ConnectionDeck Counterweight Spring Installation Deck Leveling Body Rod in Engaged Position Body Rod in Stowed PositionCheck Engine Crankcase OIL Level Adjust Mower Cutting HEIGHT, if RE- Quired Operating Instructions Control IDENTIFICATION, LOCATION, and FunctionOperating Controls PTO Switch Engine ChokeEngine Throttle Choke and Throttle Location Forward Speed Control FSCHydro Lockout Rod Location Hourmeter Left Wheel Right Wheel Steering Lever Operating Controls Top View from Drivers Point of ViewAdjusting Ground Speed and Steering Starting the EngineDisengaged Correct Operator Hand Position on the Controls Engaging the Mower Blade Clutch Engaged Blade Clutch DisengagedCutting Height Adjustment Stopping the MachineTransaxle Lockouts Hydro Lockout Rod Freewheel PositionHydro Lockout Rod Normal Operating Position Recommendations for MowingSide Discharge Shield in Lowest Position Maximum Recommended Side SlopeMaintenance Instructions Service Item 100 250 Daily Hours YearlyImportant Tips for Care of the Briggs & Stratton Engine Lubrication Engine OilEach USE Dipstick Operating RangeDipstick and Oil Fill View from above left side of tractor Grease Fitting and Oil Point LubricationLubrication Maintenance Instructions Mower Deck Gearbox Lubrication Transaxle LubricationCleaning Keep Engine Screen CleanTransaxle Oil Filter Location Transaxle Drain Plugs View from underside of tractorCleaning Clean Cooling Fins and Fan Air Cleaner SystemDeck Secured in Tilt-Up Position CHECKING/SERVICINGBattery Cleaning the TerminalsBatteries Produce Explosive Gases Tire PressureMower Blade Profile For Sharpening Blade Balanced on Magnetic Wall-Mounted BalancerDrive Belts REPLACING/REPAIRING Spark PlugsBreaker Points Belt LocationsEngine/PTO Belt Remove Belt GuardEngine/PTO Belt Disengaged Engine/PTO Belt EngagedGround Drive Belt Assembly Disengaged Ground Drive Belt Assembly EngagedFuel Filter Fuel Filter LocationCutting Blade Shear Bolts PTO Shear PinMower Blades Adjustments Steering Lever Position Adjustment StepStop Bolt Location Stop Bolt Adjustment Steering Handles Adjustment StepSteering Lever Adjustment Neutral Position Adjustment StepFSC Position Steering Adjustment Actuator Rod Length AdjustmentFull Forward Speed Adjustment Step Straight Tracking Adjustment StepNeutral Window Neutral Travel EndNeutral Travel End Adjust Neutral Switch Adjustment StepFSC Switch Location Forward Speed Control Friction Adjustment StepADJUSTMENTS/ Electrical System Tilt-Up Deck Adjustable Stop75$&725&$/6 0DLQWHQDQFHHFDOVRefer to Decks Parts Manual 13 for Deck Decals +$66,6$660% 7LOW8S/DWFK$VVHPEO\Dvwhqhuv KDVVLV$VVHPEO\F009 $,1&203211732575$160,66,21 372ULYH$VVHPEO\ DvwhqhuvF051 5283 XHO7DQN$VVHPEO\KRNHDQG7KURWWOH$VVHPEOLHV F392 +5267$7,&*52815,9$660%/,6 URXQGULYH$VVHPEOLHV3DUNLQJ%UDNH$VVHPEO\ F066 675,1*&21752/$660%/,6 6WHHULQJ/HYHU6&$VVHPEOLHV Dvwhqhuv7UDQVPLVVLRQ6SULQJ$VVHPEOLHV F183 75,&$/$660% OHFWULFDO$VVHPEO\ DvwhqhuvDetail a 635$7$,/+/$/.,7 6SUHDG$OH.LW DvwhqhuvF016 6&+0$7 Limited Warranty For Walker Model MB Rider Mower Sound Model MB Sound Test
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