Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty A O A 21" Rotary Mower- AL Model Series 420 iMPORTANT READ SAFETY RULES AND iNSTRUCTiONS CAREFULLY BEFORE OPERATION Warning: This unit is equippedwith an internalcombustionengineand shouldnot be usedon or nearany unimprovedforest-covered,brushcoveredor grass-coveredland unlesstheengine'sexhaustsystemis equippedwith a sparkarrestermeetingapplicablelocalor statelaws(if any).
This Operator's Manual is an important part of your new lawn mower, it will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says. Table of Contents Slope Gauge ....................................................... Safe Operation Practices ................................... Setup and Adjustment ....................................... Operating Your Lawn Mower .............................. 3 4 6 8 Maintaining Your Lawn Mower ....................
O Sight and hold this levelwith a vertical tree... o 1= o >:.
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to State of Californiato cause cancer and birth defects or other reproductiveharm. DANGER: This machine was built to be operated according to the rules for safe operation in this manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This machine is capable of amputating hands and feet and throwing objects.
19.Shut the engine off andwait untilthe bladecomesto a completestop before removingthe grasscatcheror unclogging the chute. The cuttingbladecontinuesto rotatefor a fewseconds after the engine is shut off. Neverplaceany part of the bodyin the bladearea untilyou are surethe blade hasstopped rotating. 20. Neveroperate mowerwithoutpropertrail shield, discharge cover,grass catcher,bladecontrol handleor othersafety protectivedevices in placeand working.Neveroperate mowerwithdamagedsafetydevices.
1. Removeanypackingmaterialwhich may be between upperand lowerhandles. a. Pull up and backon upperhandleas shownin Step 1.Makecertainthe lowerhandleis seated securelyintothe handle mountingbrackets. b. Tightenhandknobs securingupperhandleto lowerhandle.Make surethat eachcarriagebolt is seatedproperlyin the handle. 2. Locatehairpinclip in one holeon the weldpin on each sideof lowerhandle. a. Removehairpinclipfrom this hole.Usinga pair of pliers,insert hairpinclip intothe other holeon the weldpin.
5. An adjustingplateand thumb leverat each wheel positionprovidescuttingheightadjustment. a. Depresslevertowardswheel. b. Moveit to anyof the ninepositionsfor desired cutting height.SeeStep 5. c. Releaselevertowardsmowerdeck. 6. Followstepsbelowto assemblethe grasscatcher: a. Placebag overframe sothat its black plasticside is at the bottom. uStment b. Slip plasticchannelof grass bagoverhooks on the frame.See Step6. All the plasticchannelsexcept centertop of bagattachfrom outsideof bag. c.
/ Know Your Lawn Mower Blade Control --, Upper Handle Recoil Lower Handle Starter Ro Oil Fill Grass Catcher Cutting Height Adjustment Lever (for each wheel) WARNING The blade control mechanism is a safety device. Never attempt to bypass its operations. Gasoline Fill I Use extreme care when handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Never fuel the machine indoors or while the engine is hot or running.
WARNING:The operationof any lawn mowercan result in foreign objects being thrownintothe eyes,whichcan damageyoureyes severely.Always wear safetyglasseswhileoperating the mower,or while performing any adjustmentsor repairson it. Starting Engine Mower WARNING:Besure no one otherthan the operatoris standingnear the lawn mower whilestartingengine or operatingmower. Never run engine indoors or in enclosed, poorly ventilated areas. Engine exhaust contains carbon monoxide,an odorless and deadly gas.
Deck Care Clean underside of the mower deck after each use to prevent build-up of grass clippings or other debris. Follow steps below for this job. 1. Disconnectsparkplug wire. Draingasolinefrom lawn mower,or placea pieceof plasticunderthe gas cap. 2. Tip mowersothat itrestson the housing.Keepthe sidewith the air cleanerfacingup. Hold mowerfirmly. Lubricate these _ointsbefore Maintaining reassembly.
Blade Care " " cutting blade for sharpening or ARNING: When removing the replacement, protect your hands with a pair of heavy gloves or use a heavy rag to hold the blade. _ Maintaining Yo ur LaWn ow er Periodicallyinspectthe bladeadapterfor cracks, especiallyif youstrikea foreignobject. Replacewhen necessary.Followthe stepsbelowfor blade service. 1. Disconnectsparkplug wirefrom spark plug.Turn moweron itsside makingsurethat the air filter and the carburetorare up. J Figure 4 2.
Problem Eng neaf ils to start Cause Remedy , Bladecontrol handledisengaged.... I 2. 1: Engageblade control handle. Sparkplugwire disconnected. 21 connect wireto spark plug, &Fuel tank emptyor stale fuel. 41 & Enginenot prirned. OPerating ouiLawn Mowei Fut sark u a y p p!g, 7 Engineruns erratic For repairs beyond the minor adjustments listed here, contact an authorized service dealer. Eng ne overheats 5 C ean adjust gap or repace 6. Blockedfuel iinel Engine flooded 6, Cleanfuel line; 7.
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1 747-1161A Blade Control Handle 27 15261C FrontAdjustmentPlate 2 749-1092A Upper Handle 28 720-0426 AdjustmentLeverKnob 3 747-04080 Grass Catcher Frame 29 732-0404 SpringLeverAssembly 4 749-0928A Lower Handle 30 738-0507B ShoulderScrew 5 720-0279 Wing Nut 31 734-2004A FrontWheel8 x 2.125ZagBB Black Screw,1/4-15x 1.
MANUFACTURER'S LiMiTED WARRANTY FOR YaRD-MaN, The limitedwarrantyset forth belowisgivenby MTDLLCwith respectto newmerchandisepurchasedand usedin the UnitedStates,its possessionsand territories. "MTD"warrantsthis productagainstdefectsin materialand workmanship for a periodof two (2) yearscommencingon the dateof originalpurchase and will, at its option,repairor replace,free of charge,anypart foundto be defectivein materialsor workmanship.
