Safe Operation Practices • Set-Up • Operation • Maintenance • Service • Troubleshooting • Warranty Operator’s Manual Push Mower — Model 50M9 WARNING READ AND FOLLOW ALL SAFETY RULES AND INSTRUCTIONS IN THIS MANUAL BEFORE ATTEMPTING TO OPERATE THIS MACHINE. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY. MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 Printed In USA Form No.
1 To The Owner Thank You Thank you for purchasing a Lawn Mower manufactured by MTD LLC. It was carefully engineered to provide excellent performance when properly operated and maintained. Please read this entire manual prior to operating the equipment. It instructs you how to safely and easily set up, operate and maintain your machine. Please be sure that you, and any other persons who will operate the machine, carefully follow the recommended safety practices at all times.
Important Safe Operation Practices 2 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 this machine. Failure to comply with these instructions may result in personal injury. When you see this symbol.
12. A missing or damaged discharge cover can cause blade contact or thrown object injuries. 13. Many injuries occur as a result of the mower being pulled over the foot during a fall caused by slipping or tripping. Do not hold on to the mower if you are falling; release the handle immediately. 14. a. Step back from mower to fully extend your arms. b. Be sure you are well balanced with sure footing. c. Pull the mower back slowly, no more than half way toward you. d. Repeat these steps as needed.
Service 3. Check the blade and engine mounting bolts at frequent intervals for proper tightness. Also, visually inspect blade for damage (e.g., bent, cracked, worn) Replace blade with the original equipment manufacture’s (O.E.M.) blade only, listed in this manual. “Use of parts which do not meet the original equipment specifications may lead to improper performance and compromise safety!” 4. Mower blades are sharp and can cut. Wrap the blade or wear gloves, and use extra caution when servicing them.
Spark Arrestor Average Useful Life Warning: This machine is equipped with an internal combustion 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 arrester meeting applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
or a corner of a building... a 1 5 ° slop or a fence post ine (r ep r e s e nts dl o n g d otte l Fold a Sight and hold this level with a vertical tree... 15° Use this page as a guide to determine slopes where you may not operate safely. e) WARNING: Do not operate your lawn mower on such slopes. Do not mow on inclines with a slope in excess of 15 degrees (a rise of approximately 2-1/2 feet every 10 feet). A riding mower could overturn and cause serious injury.
3 Assembly & Set-Up Contents of Carton • One Lawn Mower • • One Mulching Baffle (If Equipped) One Lawn Mower Operator’s Manual • Assembly Handle NOTE: This lawn mower is shipped without gasoline or oil in the engine. Fill up the gasoline and oil as instructed in the accompanying engine manual BEFORE operating your mower. 1. 1. Push the chute deflector up towards the engine. Holding the deflector in this position, remove the retainer and discard. See Fig. 3-1. b.
NOTE: Each end of the lower handle must be placed in the same position on the mounting brackets. a. 4. Use the cable tie provided to secure cable to the lower handle. Pull the cable tie tight and trim excess. See Fig. 3-5. Remove the star knobs shown in Fig. 3-3 and remove the lower handle. Figure 3-5 Figure 3-3 3. Rear Wheels b. Position each handle bracket stud into the top hole in the lower handle. c. Tighten the star knobs. Install rear wheels as follows in Fig.
Mulching Baffle (If Equipped) Adjustments 1. Cutting Height If your mower is equipped with an optional mulching baffle, install it on the right side of the deck. Follow the sequence indicated here. a. b. Lift up and hold the side-discharge chute deflector and insert the bottom lip of the mulching baffle inside the chute opening See Fig. 3-7. Snap the hooks of the mulching baffle over the hinge pin of the chute deflector.
4 Controls and Features Blade Control Recoil Starter Cutting Height Adjustment Lever (one at each wheel) Figure 4-1 Blade Control Recoil Starter The blade control is attached to the upper handle of the mower. Depress and squeeze it against the upper handle to operate the unit. Release it to stop engine and blade. The recoil starter is attached to the right upper handle. Stand behind the unit and pull the recoil starter rope to start the unit. WARNING: This blade control is a safety device.
5 Operation Starting Engine 1 WARNING: Be sure no one other than the operator is standing near the lawn mower while starting engine or operating mower. Never run engine indoors or in enclosed, poorly ventilated areas. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Keep hands, feet, hair and loose clothing away from any moving parts on engine and lawn mower. 1. Standing behind the mower, depress the blade control handle and hold it against the upper handle. 2.
6 Maintenance & Adjustments Maintenance 4. General Recommendations • Always observe safety rules when performing any maintenance. • The warranty on this lawn mower does not cover items that have been subjected to operator abuse or negligence. To receive full value from warranty, operator must maintain the lawn mower as instructed here. • Changing of engine-governed speed will void engine warranty. • All adjustments should be checked at least once each season.
7 Service Blade Care WARNING: When removing the cutting blade for sharpening or replacement, protect your hands with a pair of heavy gloves or use a heavy rag to hold the blade. WARNING: An unbalanced blade will cause excessive vibration when rotating at high speeds. It may cause damage to mower and could break causing personal injury. 5. Lubricate the engine crankshaft and the inner surface of the blade adapter with light oil. Slide the blade adapter onto the engine crankshaft.
8 Troubleshooting Problem Engine Fails to start Cause Remedy 1. Blade control disengaged. 1. Engage blade control. 2. Spark plug boot disconnected. 2. Connect wire to spark boot. 3. Fuel tank empty or stale fuel. 3. Fill tank with clean, fresh gasoline. 4. Engine not primed (if equipped with primer). 4. Prime engine as instructed in the Operation section. 5. Faulty spark plug. 5. Clean, adjust gap, or replace. 6. Blocked fuel line. 6. Clean fuel line. 7. Engine flooded. 7.
9 Engine Operation Fuel Cap Air Cleaner Starter Grip Oil Fill Cap Oil Drain Spark Plug Figure 9-1 Pre-Operation Check 10w Oil Recommendations 20w NOTE: This engine is shipped without gasoline or oil in the engine. Running the engine with insufficient oil can cause serious engine damage and void the engine warranty. • 1 Before starting engine, fill with oil. Do not over-fill. Oil capacity is about 20 oz.
Check Oil Level Check Fuel Level NOTE: Be sure to check the engine on a level surface with the engine stopped. 1. Clean around fuel fill before removing cap to fuel. 2. Fill tank to approximately 1-inch below lowest portion of neck to allow for fuel expansion. Be careful not to overfill. 1. Remove the oil filler cap and wipe the dipstick clean. See Fig. 9-2. NOTE: Before refueling, allow engine to cool 2 minutes.
10 Engine Maintenance WARNING: Shut off the engine before performing any maintenance. To prevent accidental start-up, disconnect the spark plug boot. IMPORTANT: If engine must be tipped to transport equipment or to inspect or remove grass, keep spark plug side of engine up. Transporting or tipping engine spark plug down may cause smoking, hard starting, spark plug fouling, or oil saturation of air cleaner.
Oil Service Air Cleaner Service • Check oil level regularly. • Be sure correct oil level is maintained. Check every five hours or daily before starting engine. See oil checking procedure in the Operation section. Paper filters cannot be cleaned and must be replaced once a year or every 100 operating hours; more often if used in extremely dusty conditions. WARNING: Never use gasoline or low flash point solvents for cleaning the air cleaner element. A fire or explosion could result.
Spark Plug Service 3. WARNING: DO NOT check for spark with spark plug removed. DO NOT crank engine with spark plug removed. Measure the plug gap with a feeler gauge. Correct as necessary by bending side electrode. See Fig. 10-4. The gap should be set to 0.030 in. To ensure proper engine operation, the spark plug must be properly gapped and free of deposits. 1. Remove the spark plug boot and use a spark plug wrench to remove the plug. See Fig. 10-3. Electrode Spark Plug 0.030 in. Figure 10-4 4.
Fuel Filter Service Storage The fuel filter cannot be cleaned and must be replaced once a year or every 100 operating hours; more often if run with old gasoline. Engines stored between 30 and 90 days need to be treated with a gasoline stabilizer and engines stored over 90 days need to be drained of fuel to prevent deterioration and gum from forming in fuel system or on essential carburetor parts.
The EZ Start Promise Provisions of Your Limited Warranty In addition to the other terms and conditions of the Limited Warranty applicable to your new mower, MTD LLC (“MTD”) hereby warrants that your mower’s engine will start on the first or second attempt by an able-bodied adult (subject to the limitations described below) for the duration of the manufacturer’s limited warranty applicable to your product.
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Model 50M 3 40 5 41 36 4 33 2 35 1 34 7 27 30 6 39 29 28 6 14 8 31 9 15 32 25 16 23 26 14 31 24 22 21 17 14 18 20 19 37 14 38 10 14 11 12 13 24
Model 50M Ref. Part Number Description Ref. Part Number Description 1. 710-1205 Eye Bolt 22. 736-0270 Bell Washer, .265 ID x .75 OD 2. 720-0279 Wing Nut 23. 710-0216 Screw, 3/8-16 x .75 3. 747-1161A Blade Control Handle 24. 738-04267 Shoulder Screw 4. 749-1092A Upper Handle 25. 734-04082 Rear Wheel 5. 746-04486 Control Cable 26. 682-3062A Handle Bracket Assembly, RH 6. 749-04037 Lower Handle — 682-3063A Handle Bracket Assembly, LH 720-04072 Star Knob 7.
Engine Model - 5P65MO 21 29 8 9 15 20 1 7 3 2 13 19 18 24 25 11 29 10 26 28 17 6 5 4 12 14 27 22 23 16 26
Engine Model - 5P65MO Ref No. Part Number 1. 751-10337 Fuel Tank 2. 751-10875 Flywheel Shroud 3. 751-10335 Rubber Fuel Tank Mounting Washer 4. 751-10334 Oil Filler Tube Assembly 5. 751-10333 Dipstick Assembly 6. 751-10877 Cylinder Head Complete 7. 751-10878 Short Block Assembly 8. 751-10320 Stop Switch and Brake Assembly 9. 751-10319 Recoil Spring and Pulley Assembly 10. 751-10314 Push Rod Kit 11. 751-10313 Valve Kit 12. 751-10370 Oil Drain Plug and Washer Assembly 13.
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MTD CONSUMER GROUP (MTD) and the United States Environment Protection Agency (U. S. EPA) Emission Control System Warranty Statement (Owner’s Defect Warranty Rights and Obligations) The U. S. EPA and MTD are pleased to explain the emissions control system warranty on your model year 2005 and later small off-road engine. New small off-road engines must be designed, built and equipped to meet the stringent anti-smog standards.
(7) The engine manufacturer is liable for damages to other engine components proximately caused by a failure under warranty of any warranted part. (8) Throughout the engine’s warranty period defined in Subsection (a)(2), MTD will maintain a supply of warranted parts sufficient to meet the expected demand for such parts. (9) Any replacement part may be used in the performance of any warranty maintenance or repairs and must be provided without charge to the owner.
MANUFACTURER’S LIMITED WARRANTY FOR The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States and/or its territories and possessions, and by MTD Products Limited with respect to new merchandise purchased and used in Canada and/ or its territories and possessions (either entity respectively, “MTD”).
