YARDMACHINES ® OPERATOR'S MANUAL Model Series 230 and 520 22" SELF-PROPELLED ROTARY MOWERS (520 Series Shown) IMPORTANT: Warning: READ SAFETY RULES AND INSTRUCTIONS This unit is equipped with an internal combustion CAREFULLY engine and should not be used on or near any unimproved forest- covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark attester meeting applicable local or state laws (if any).
SECTION 1: FINDING YOUR MODEL NUMBER This Operator's Manual is an important part of your new walk behind lawn mower. It will help you assemble, prepare and maintain your machine. Please read and understand what it says. Before you start to prepare your walk behind lawn mower for its first use, please locate the model plate and copy the information from it in this Operator's Manual.
SECTION 3: IMPORTANT SAFE OPERATION PRACTICES WARNING: This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others, read and follow all instructions in this manual before attempting to operate your lawn mower, failure to comply with these instructions may result in personal injury, when you see this symbol, heed its waming. California to cause defects or other reproductive harm.
• Donotengagetheself-propelled mechanism on • Always be sure of your footing. A slip and fall can unitssoequipped whilestarting engine. cause serious personal injury. If you feel you are losing your balance release the blade control • Thebladecontrol handle is a safetydevice. Never handle immediately and the blade will stop in less attemptto bypassitsoperation. Doingso makes than 3 seconds. the safetydeviceinoperative andmayresultin personal injurythroughcontactwiththe rotating blade.
• Toreducefirehazard, keepmowerfreeof grass, leaves, orotherdebrisbuild-up. Cleanupoilorfuel spillage. Allowmowerto coolat least5 minutes before storing. • Beforecleaning, repairing, or inspecting, make certainthe bladeand all moving parts have stopped. Disconnect the spark plug wire, and keep the wire away from the spark plug to prevent accidental starting. • Check the blade and engine mounting bolts at frequent intervals for proper tightness. Also, visually inspect blade for damage (e.g.
USE THIS PAGE AS A GUIDE TO DETERMINE SLOPES WHERE YOU MAY NOT OPERATE SAFELY. SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE i'
SECTION 5: UNPACKING REMOVING UNIT FROM CARTON Remove staples, break glue on top flaps, or cut tape at carton end and peel along top flap to open carton. Remove loose parts if included with unit (i.e., operator's manual, etc.). Make sure the cables are straight and not crimped while removing loose parts or the unit from the carton. Cut along dotted lines and lay carton down flat. Remove packing material. Roll or slide unit out of carton. Check carton thoroughly for loose parts.
Starter Rope Height Adjuster Lever Guide Carria_ Hairpin Clip in Inner Hole HandKnob A Handle Mounting Bracket Weld Pin B Figure 5 HOW TO SET UP YOUR LAWN MOWER • Remove any packing material which may be between the upper and lower handles for shipping purposes. • Move the height adjustment lever located near the left rear wheel to the highest position. • Pull up and back on the upper handle to raise the handle into the operating position.
• To remove this retainer, move the spring-loaded chute toward the engine by pushing above the retainer. • Remove the retainer and carefully lower the chute into operating position, keeping fingers out of the way. See Figure 6. _, WARNING: MULCHING BAFFLE The shipping chute retainer must be removed and discarded before operating the mower. (OPTIONAL) A mulching kit is available for the mowers shown in this manual.
SECTION 6: CONTROLS Control _ Blade Control Handle \ Drive Clutcl_ Rec Sta'_t Handle Recoil Starter B A Figure 8 BLADECONTROLHANDLE _hb WARNING: This control mechanism is a safety device. Never attempt to bypass its operations. The blade control handle is located on the upper handle of the mower. See Figure 8. The blade control handle must be depressed in order to operate the unit. Release the blade control handle to stop the engine and blade.
SECTION 7: OPERATION WARNING: Keep hands and feet away from the chute area on cutting deck. See Figure 2 in the Safety Section. WARNING: ,_ The operation of any lawn mower can result in foreign objects being thrown into the eyes, which can result in severe eye damage. Always wear safety glasses or eye shields. We recommend wide vision safety mask for over spectacles or standard safety glasses. NOTE: For shipping purposes your mower is set with the wheels in a low cutting height position.
TO STOP ENGINE AND BLADE • Move throttle control lever (if equipped on the handle) to the SLOW position (turtle). • Release the blade control handle to stop the engine and blade. WARNING: The blade continues to rotate for a few seconds after the engine is shut off. • Disconnect the spark plug wire and ground it against the engine to prevent accidental starting while equipment is unattended.
An adjustingplateandthumbleverat eachfrontwheelprovidescuttingheightadjustment. A singleleverneartheleft rearwheeladjustsbothrearwheelssimultaneously. Eachadjustingplatehasnineheightpositions.Heightofcutwill be changedwhenthe thumbleveris movedfromonepositionto another.Simplydepressthe levertowardswheel andmovewheelandleverassemblytodesiredposition.SeeFigure9. HANDLE HEIGHT ADJUSTMENT (230 series mowers only) Your mower is shipped with the handle in the higher height position.
B. Style 2 Controls: To adjust the tension on the belt, first adjust the cable at the cable bracket on the handle. Proceed as follows: • Engage the drive clutch control handle (squeeze handle against the upper handle). Measure the spring on the drive clutch cable. It should measure approximately 2-1/4 inches long as shown in Figure 11B, inset. • If adjustment is necessary, loosen the screw which secures the cable bracket to the upper handle.
LUBRICATION _ kind of work on lawn mower. ARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or doing any Blade Control Lubricate the pivot points on the blade control handle and the brake cable at least once a season with light oil. See Figure 12. The blade control must operate freely in both directions. Chute Deflector Lubricate the torsion spring and pivot point periodically with light eil to prevent any rust or binding. Deflector must work freely.
Replacing Blade NOTE: If the adapter is keyed, make sure that the key in the adapter is aligned with the key slot on the crankshaft. • Place the two pulleys, the flat washer, the spring washer and the spacer on the engine crankshaft. See Figure 13. _L'_ Flat Washer ---_ Spacer Spdng Washer Blade Adapter Figure 13 • Install the blade adapter on the crankshaft with the "star" away from the engine. See Figure 14.
ENGINE Refer to the separate engine manual for engine maintenance instructions. • Maintain engine oil as instructed in the separate engine manual packed with your unit. Read and fellow instructions carefully. • Service air cleaner every 25 hours under normal conditions. Clean every few hours under extremely dusty conditions. Poor engine performance and flooding usually indicates that the air cleaner should be serviced. To service the air cleaner, refer to the separate engine manual packed with your unit.
Idler Pulley J Belt Figure 16 • Release the idler pulley so that it falls down into position. Slide the belt in between the idler pulley and the belt cover on the idler pulley bracket. See Figure 17. • Lightly grease the crankshaft. Place the belt between the two pulley halves, and reassemble the blade adapter and the blade. Belt Guard Idler Pulley Pulley Figure 17 • Reassemble the transmission belt cover.
SECTION 11: TROUBLE SHOOTING Trouble Possible Engine fails to start Blade control handle disengaged, Spark plug wire disconnected. Dirty aircleaner. Primer button not depressed. Throttle control lever not in correct starting position (if so equipped). Fuel tank empty or stale fuel. Engine runs erratic Engine overheats Cause(s) Blocked fuel line (if so equipped), Faulty spark plug, Engine flooded. Unit running in START position. Spark plug wire loose.
Model Series 230 63 61 68 51 52 See engine operator's manuai, 31 30 44 29 43 83_ 33 28 ,36 27 Z 49- 18.
Model Series 230 REE NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2O 21 22 23 24 25 26 27 28 29 3O 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 PART NO.
Model Series 520 6O 67 63 / 105 58 64 72 65 55 54 73 74 \ 75 76 36 81_7778 8786 8L--__, See engine manual. ] O_ 93 30\ 46 98 26 13 4 3 \ 2 22
Model Series 520 REE NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 PART NO.
_8 .5\ 2\ _--20 REE NO. 1 2 3 4 5 6 7 8 9 11 12 13 15 16 17 18 20 21 22 24 25 PART NO. 710-1062 726-0329 618-0053 713-0400 736-0336 741-0413 16500A 736-0314 741-0479 717-1216 748-0208A 721-0212 756-0330A 736-0270 712-0351 738-0440 738-0826 656-0008 741-0556 782-7570 712-0138 ............ j,, 38 "__17 DESCRIPTION REF. NO. PART NO. Hex Bolt 1/4-20 x 1,25" Lg, L-Wash. 1/4" I.D. Upper Hsg. Half (Incl. Ref, 12) #48 Sprocket 7 Tooth x 1/2 Pitch FhWash. 5/8"1.D.
Engine Shrouds Part No, 751B281439 751B281440 Color Dark Red Black 751B281443 Bright Red Hardware: 710-1256 Part No, Color 731-1585B Black Hardware: 710-1274 Part No, 7511681311 7511681911 7511682011 Color Black Red G_y Part No, Color 731-1395A Red 731-1396A Black 731-1397A Gray Hardware: 710-1256 Part No, Color 731-1402A Yellow 731-1694 Black 731-1695 Silver 731-1934 Charcoal Hardware: 710-1256 Part No, Color 731-1586B Black 731-1612A Red Hardware: 7510042823 Part No.
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MANUFACTURER'S LIMITED WARRANTY FOR: Y . c.,.esj[f For TWO YEARS from the date of retail purchase within the United States of America, its possessions and territories, MTD PRODUCTS INC will, at its option, repair or replace, for the original purchaser, free of charge, any part or parts found to be defective in material or workmanship.
