Models 20” Push This Instruction Book contains information for several models. Read and keep this book for future reference. This book contains important information on SAFETY, ASSEMBLY, OPERATION, AND MAINTENANCE. PRODUCT INFORMATION The owner must be certain that all the product information is included with the unit. This information includes the INSTRUCTION BOOKS, the REPLACEMENT PARTS and the WARRANTIES. This information must be included to make sure state laws and other laws are followed.
MURRAY, INC. One Year Limited Warranty Murray, Inc.
OWNER’S INFORMATION This instruction book is written for a person with some mechanical ability. Like most service books, not all the steps are described. Steps on how to loosen or tighten fasteners are steps anyone can follow with some mechanical ability. Read and follow these instructions before you use the unit. Know your product: If you understand the unit and how the unit operates, you will get the best performance. As you read this manual, compare the illustrations to the unit.
IMPORTANT Safe Operation Practices for Walk-Behind Mowers. This cutting machine is capable of amputating hands and feet and throwing objects. Failure to observe the following safety instructions could result in serious injury or death. I. General Operation tion which can cause drowsiness or affect your ability to operate this machine safely. 1. Read, understand, and follow all instructions on the machine and in the manual(s).
DO NOT: IMPORTANT Do not mow near drop-offs, ditches, or embankments. The operator could lose footing or balance. Do not mow excessively steep slopes. Do not mow on wet grass. Reduced footing could cause slipping. III. Children Tragic accidents can occur if the operator is not alert to the presence of children. Children are often attracted to the mower and the mowing activity. Never assume that children will remain where you last saw them. 1.
SAFE MOWING GUIDE gency. Learn how to cut and how to keep control of the mower at all times. Many mowers are started manually. When using a pull start or rope start, place your feet firmly and away from the blade. Hold the rope handle securely, but never wrap the rope around your arm or fingers for a “better grip”. The mower is designed for use by one person. Always mow alone. Never carry passengers. Carrying a passenger is dangerous for the passenger and the operator.
SAFE MOWING GUIDE bruises, or even put out an eye. Often the person hurt by a thrown object is a bystander such as a child, another family member or a neighbor. Keep people and pets completely away from the mowing area. Direct the mower’s discharge away from areas where people can be. Planning your mowing pattern has a double benefit. It can reduce chances of an injury and make the clean up after mowing easier.
SAFE MOWING GUIDE Use only original equipment or approved substitutions as service parts. If you need professional service, select a shop that is an Authorized Service Center for your brand of mower. If you plan to service the unit yourself, follow directions in the Instruction Book. in the rain is no fun and it is dangerous. Always seek shelter in an electrical storm.
SAFE MOWING GUIDE equipped, in FAST position when mowing and bagging. When bagging, slower ground speed will provide the best results. Change the mowing pattern slightly each time you cut. If you always cut the same way, the grass will develop a “set” and clippings will accumulate more heavily in some areas more than in others causing grass to get thinner in those areas. Do not service your mower over the grass. Spilled oil and gas can kill the grass.
STEPS TO FOLLOW BEFORE MOWING D D D D D D D D D D D Be sure to dress correctly. Wear hard shoes, not sandals or tennis shoes. Examine the blade. A blade that is bent, cracked, or damaged must be replaced with a factory replacement blade. Fill the fuel tank outside. Clean off spilled fuel. Read and follow the Owner’s Manual, the instructions with the engine, and the instructions with any attachments. Owner’s Manual instructions are for your safety and the safety of others. Exhaust fumes are dangerous.
ASSEMBLY Read and follow the assembly and adjustment instructions for your mower. All fasteners are in the parts bag. Do not discard any parts or material until the unit is assembled. NOTE: Torque is measured in foot pounds (metric N.m). This measurement describes how tight a nut or bolt must be. The torque is measured with a torque wrench. WARNING: Before doing any assembly or maintenance to the mower, remove the wire from the spark plug.
ASSEMBLY 3. Attach the chute deflector to the mower housing with a bolt, washer, and nut (Figure 1). Make sure the fasteners are tight. NOTE: In this instruction book, left and right describe the location of a part with the operator standing behind the handle. UNPACKING INSTRUCTIONS For shipping purposes, the mower was not fully assembled. To complete the assembly of the mower, follow the steps below.
ASSEMBLY HOW TO ASSEMBLE THE CONTROLS TO THE HANDLE Two types of handles are shown in Figure 4. The engine on your model will determine which type of handle is on your model. Type A is for models with Briggs & Stratton engines. Type B is for models with Tecumseh engines. with Tecumseh engine, make sure the stop lever bracket is on the right side of the handle. 1. Mount the ends of the engine stop lever into the top holes of the handle.
ASSEMBLY 3. Attach the engine stop cable to the engine. Models with Briggs & Stratton engines are shown in Figure 5. Models with Tecumseh engines are shown in Figure 6. Briggs Engine 4. Make sure the engine stop cable moves freely. If the cable does not move freely, repeat the above steps. Engine Stop Cable CAUTION: A cable that is bent or damaged will not work correctly. Before you use the unit, replace a damaged cable. 5. Attach the cable to the handle with the cable fastener(s) as shown in Figure 4.
ASSEMBLY HOW TO ASSEMBLE THE WHEELS WITH AXLE BOLTS Mower Housing 1. To change the height of cut, change the position of the axle bolts on the mower housing. Make sure you assemble each axle bolt in the same hole position so that the mower will cut level. Hub Cap 2. Make sure to mount each wheel with the wheel flange on the inside toward the mower housing as shown. Assemble the wheel to the mower housing with an axle bolt, washer, and flange nut (Figure 8). To tighten, turn the axle bolt.
ENGINE STOP LEVER OPERATION WARNING: Always use a safety gasoline container. Do not smoke when adding gasoline to the fuel tank. When inside an enclosure, do not add gasoline. Before you add gasoline, stop the engine and let the engine cool for several minutes. 3. Make sure the spark plug wire is connected to the spark plug. 4. The primer button is on the side of the engine (Figure 10). Push the primer button. Every time you push the primer button, wait two seconds.
ENGINE MAINTENANCE MAINTENANCE S S S S Use the following maintenance section to keep your unit in good operating condition. All the maintenance information for the engine is in the ”Engine Instruction Book”. Before you start the engine, read this book. Hard starting. Engine smoking. Spark plug fouling. Oil or gas saturation of the air filter. WARNING: Before you make an inspection, adjustment (except carburetor), or repair, disconnect the wire from the spark plug.
BLADE SERVICE MAINTENANCE 6. Mount the blade with the curved edges toward the housing. If the blade is upside down, the blade will not cut correctly and can cause an accident. 7. Fasten the blade with the original washers and bolt. Make sure the outside rims of the Belleville washers are toward the blade (Figure 14). 8. Tighten the bolt that holds the blade to a torque of 30 foot pounds. WARNING: Always keep the bolt that holds the blade tight. A loose bolt or blade can cause an accident.
MAINTENANCE CHECK THE LEVEL OF CUT Test the unit in a small area. If the height of cut is not level or if the cut grass is not discharged, the cause can be: (1) the blade is bent or damaged, (2) the blade is not sharp, (3) a worn blade, (4) or a broken blade adapter. Before you use the unit, correct the problem. Blade File Blade is balanced when parallel to the ground. Screwdriver Ground Figure 15 5. Make sure the blade is balanced.
TROUBLE SHOOTING CHART The Engine will not start. 1. Make sure the fuel tank is filled with clean gasoline. Do not use old gasoline. 2. On a cold engine, push the primer button (optional on some models). For the number of times required to push the primer button, see the engine manufacturer’s instructions. 3. Make sure the wire for the spark plug is connected to the spark plug. 4. Adjust the Carburetor. See the “Engine Instruction Book”. 5. There is too much gasoline in the engine cylinder.
REPAIR PARTS F-050401L 21
MOWER HOUSING 5 6 1 4 9 7 2 8 3 12 10 11 13 20 20 14 5 6 15 16 17 4 18 19 F-050401L 22
MOWER HOUSING KEY NO. DESCRIPTION PART NO.
HANDLE - BRIGGS & STRATTON MODELS 3 4 1 6 8 9 7 8 2 10 1213 11 KEY NO. PART NO. 14 KEY NO. PART NO.
HANDLE - TECUMSEH MODELS 4 1 6 3 8 9 7 8 10 14 1213 11 KEY NO. PART NO. 2 KEY NO. PART NO.
WHEELS AND TIRES Look at the illustrations. Select the wheel and the tire you want and order from the following chart.
F-050401L 27
HOW TO ORDER REPAIR PARTS Only use a factory repair part. Repair parts, except for the engine or the transmission, are available from the store where the unit was purchased, a service shop recommended by the store, or an authorized service shop found in the yellow pages of the telephone directory. If you cannot get a repair part or service as described above, call or write to the Central Parts Distributor shown below.
