SHINDAIWA OWNER’S AND OPERATOR’S MANUAL EC7500/EC7600 ENGINE CUTOFF SAW (EPA VERSION) USE ONL SHINDAIY GENUINE WA BLA No perfor DES mance guaran tee withou Shinda t using iwa blades . No-load revolution speed: 4180 min-1 Use reinfor ced abrasi (rpm) useable ve blades perime with maxim ter velocit um y of 248 ft/sec. Maximum blade diame Maximum blade thickn ter: 12 in. Arbor diame ess: 0.16 ter: 1 inch in. genuine EC7500 WARNING! ■ Read this manual and familiarize yourself with its contents.
Contents Page Labels and Symbols Attention Statements ............................ 2 The following are symbols that appear Labels and Symbols ............................. 2 on the unit. Safety Precautions ................................ 3 Read and follow the operator’s manual. Failure Safety/Operation Information Labels ... 7 to do so could result in Unit Description ................................... 8 serious injury. Technical Specifications ...................... 9 Always wear hearing Assembly ....
Safety Precautions WARNING! Before Operation ■ Children and people who do not understand this manual must not use this unit. ■ Never allow other people or animals to be near the unit when starting or operating. ■ Never touch a rotating cut-off wheel. ■ Operate the unit only in a well ventilated area. ■ Never operate the unit in a closed area such as a room, warehouse or tunnel. Running the unit in a closed area may cause serious illness or even death due to exhaust gas.
Safety Precautions (continued) WARNING! Before Operation (continued) ■ Before cutting into a material, familiarize yourself with the risks associated with dust, fumes, or mists that may be generated during operation. Make sure you provide adequate protection against harmful emissions. A highperformance respirator and/or water attachment may be required. ■ Do not use the cut-off saw to cut or disturb asbestos or products containing or wrapped in asbestos.
Safety Precautions (continued) WARNING! Kickback ■ Kickback may force the cut-off wheel up and back toward the operator lightning-fast. ■ Kickback can occur whenever the upper half of the cut-off wheel touches an object. Never cut an object using the upper half of the cut-off wheel. EC7500.14 Figure 2. Always be aware of, and prepared for, kickback. Operation ■ The unit must be held firmly with both hands, one hand on the rear handle, the other on the front handle.
Safety Precautions (continued) WARNING! Operation (continued) ■ If you discover fuel leakage, immediately stop the engine. ■ Cutting may cause sparks from the cut-off wheel. Make sure there is no flammable substances nearby. ■ Never cut live electrical wires. The shock you might receive could be very serious. ■ Do not touch hot parts such as the muffler or cylinder. You could burn yourself severely. ■ The cut-off wheel gets hot while cutting. Never touch the wheel immediately after cutting.
Safety and Operation Information Labels IMPORTANT! Make sure all safety and operation information labels are undamaged and readable. Immediately replace damaged or missing safety and operation information labels, which are available from your authorized Shindaiwa dealer. T TURN THE KNOB ALL THE WAY TO FREE OR LOCK THE GUARD FREE LOCK DECOMPRESSION VALVE PRIMER EC7500.
Unit Description Air Cleaner Cover Muffler Carburetor Idle Adjustment Screw Choke Belt Guard EC7500.18 Rear Handle Primer Pump Decompression Valve Wheel Guard Lock Knob Clutch Cover Front Handle Recoil Starter Throttle Trigger Lockout Cut-off Wheel EC7500.
Technical Specifications Engine Type ........................... 2-Cycle, vertical-cylinder, air-cooled Power Transmission .......... Automatic centrifugal clutch, V-ribbed belt Displacement ....... 4.5 cu. in. (73.5cc)* Anti-Vibration System ............. Unified handles with 7-point support Bore x Stroke .. 2 x 1.4 in. (51 x 36mm) Max. Power Output** .. 4.5 hp (3.3kW) Recommended Engine Idling Speed ................ 2,500 min-1 (rpm)** Recommended Maximum Engine Speed .............
Assembly Prior to Assembly IMPORTANT! Before assembling, make sure you have all the components required for a complete unit. This unit consists of the items shown in Figure 6. Carefully inspect the engine unit for damaged or loosen bolts. If you find any damage or missing items, check with your dealer. This unit is Collar Drive Shaft equipped with a 0.86" (22mm) wheel collar. Wheel adapters for 20mm and 25.4mm cut-off wheels are located in the Flange Snap tool set. Before Ring EC7500.
4. Loosen bolt with the wrench and remove bolt and outer flange. See Figure 8. WARNING! Using an inappropriate cut-off wheel may cause the wheel to break and may result in serious injury. Outer Flange Bolt Tighten Loosen EC7500.20 Figure 8 5. Place cut-off wheel so the inner bore is properly set onto the collar. 6. Replace outer flange and bolt, and then, while holding hex wrench in the hole in belt guard, tighten the bolt with wrench. 7. Make sure the cut-off wheel is securely fastened.
Starting the Engine When the Engine is Cold WARNING! ■ Before starting the engine, place the unit on a clean, level surface. Make sure you have good secure footing and always keep a firm grip on the unit. ■ Move at least 10 feet (3m) away from the fueling site before starting the engine. ■ Make sure the cut-off wheel is well clear of obstacles. The cutoff wheel may rotate when the engine starts. EC7500.22 Figure 10. 7.
Starting a Warm Engine 1. Turn the on-off switch On. WARNING! The cut-off wheel must not rotate at idle speed. If it rotates, reduce idle speed by adjusting the idle adjust screw. EC7500.24 Figure 12 4. Remove the plug cap and disconnect the spark plug by using the 3. Pull the choke all the way out and plug wrench. See Figure 13. Check push it back to the original position to see if the spark plug electrode is (choke open). The throttle is fuel-soaked. automatically set at a fast idle position. 2.
Operation Adjusting Wheel Guard Angle WARNING! ■ Never permit bystanders or animals near the unit when starting or operating the unit. ■ Be aware of kickback! Kickback may force the cut-off wheel up and back toward the operator lightning-fast. Kickback can occur whenever the upper half of the cut-off wheel touches an object. Never cut an object using the upperhalf of the cut-off wheel. Adjust the position of the wheel guard so that fragments will not fly toward you if the wheel fractures.
Reversing cutting head for flush cutting operations WARNING! Before performing any work on the cut-off saw, make sure the engine is stopped and the ignition switch is OFF. Remove Cutting Wheel Belt Guard Loosen Two Bolts Figure 17 Tension Screw Tension Indicator Figure 15 NOTE: For units equipped with a water kit, loosen the (2) water nozzles and disconnect the main water line from the double nozzle. 1. Remove the cutting wheel (See pages 10 and 11).
Reversing cutting head for flush cutting operations (cont.) 6mm SocketHead Bolts Figure 20 Figure 19 5. Making sure that the drive belt is fully engaged in the drive pulleys, slide the belt cover on and install the two socket-head bolts into the left-hand side of the mounting surface only until the bolts bottom on the belt cover. See Figure 19. 6. Adjust the tension screw until the tension indicator is in the middle of the scale. See Figure 20. 7. Tighten the two mounting bolts securely. 8.
Cleaning the Air Cleaner Unscrew the Knob WARNING! Pre-filter Inspection and maintenance should be done in a well ventilated place and where there is no risk of fire. Dust in the air cleaner will affect engine life. The air filter must be cleaned every time you start operating. Clean the air filter once a day and replace the filter every 20 hours of operation according to the following procedures. See Figure 21. 1. Pull the choke lever out so that dust will not enter the carburetor. 2.
Adjusting the Carburetor Adjusting Idle Speed It is not necessary to adjust the carburetor when the unit is new. Adjust the carburetor only when you are sure it is necessary due to differences in working conditions such as atmospheric pressure or temperature, or change in unit conditions after more than 10 hours of use. If you are unfamiliar with carburetor adjustment techniques, ask your dealer for advice. Adjust the carburetor in accordance with the following procedures.
High and Low Speed Needle Cleaning Cylinder Fins The high and low speed needle is fixed and cannot be adjusted. Spark Plug Maintenance If the engine becomes hard to start or if idle speed is unstable, inspect the spark plug according to the following procedures. 1. Remove the spark plug. Refer to the procedures on page 13, If the Engine Does Not Start… 2. Clean the electrode with a wire brush. If necessary, adjust the electrode gap. The gap should be 0.024" (0.6mm). See Figure 24. 0.024" (0.
Replacing the Drive Belt Checking the Cut-off Wheel 1. Loosen the tension screw. Loosen the two bolts on the belt guard and remove the belt guard by sliding it to the right. See Figure 26. 2. Loosen the two bolts in the clutch cover and remove the clutch cover. 3. Replace the old belt with a new one. Slide forward to remove EC7500.35 Tension Screw Clutch Cover WARNING! Never use a wheel which has breakage, cracks or distortion. The wheel may break while operating and may result in serious injury.
Replacing the Cut-off Wheel 1. Make sure the ignition switch is Off and the engine is stopped. 2. Insert a 6mm hex wrench into the hole in the belt guard to prevent the drive shaft from turning. See Figure 29. Replacing the Cut-off Wheel WARNING! Using the wrong size collar may lead to failure of the wheel or the unit and could result in serious injury. 5. Remove the old wheel and install the new one. Make sure the inner bore is properly set onto the collar. 6.
Sharpening a Diamond Cut-off Wheel While running the engine at low speed, make about 10 passes at cutting a concrete block or a soft brick. Keep the block watered while sharpening. Lubricating the Clutch Bearing Grease the clutch bearing every 20 hours of operation. Squeezing a grease gun three times will deliver an appropriate amount of grease. See Figure 31. Checking the Fuel Filter EC7500.44 WARNING! KEEP AWAY FROM FIRE OR EXCESS HEAT! 1. Remove the fuel filler cap. 2.
Long Term Storage Whenever the unit will not be used for 30 days or longer, use the following procedures to prepare if for storage: ■ Clean external parts thoroughly. ■ Drain all the fuel from the carburetor and the fuel tank. IMPORTANT! All stored fuels should be stabilized with a fuel stabilizer such as StaBil™. To remove the remaining fuel from the fuel lines and carburetor and with the fuel drained from the fuel tank… 1. Prime the primer bulb until no more fuel passes through. 2.
Troubleshooting PROBLEM PROBLEM The engine does not start. Cutting performance is poor. Make sure the fuel tank contains with clean, fresh fuel (pg 11). Make sure the choke is pushed fully in. Remove the spark plug (pg 13). Make sure the air cleaner is clean (pg 17). Is the spark plug wet? Dry the spark plug. Inspect the spark plug (pg 19). Pull the recoil starter several times to remove fuel from the cylinder. Is the spark plug dry? Replace the fuel filter (pg 22).
The following statement only applies to United States and its territories Shindaiwa Kogyo Co., Ltd. Federal Emission Design And Defect Limited Warranty Utility And Lawn And Garden Engines Shindaiwa Kogyo Co., Ltd. warrants to the initial purchaser and each subsequent owner, that this utility equipment engine (herein engine) is designed, built and equipped to conform at the time of initial sale, to all applicable regulations of the U.S.
PARTS COVERED Listed below are the parts covered by the Federal Emission Design and Defect Warranty. Some parts listed below may require scheduled maintenance and are warranted up to the first scheduled replacement of that part. The warranted parts include: 1. Carburetor Internal Components • Valve Assembly-throttle, Jet, Metering Diaphram 2.
MAINTENANCE, REPLACEMENT OR REPAIR OF EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY ANY REPAIR ESTABLISHMENT OR INDIVIDUAL; HOWEVER, WARRANTY REPAIRS MUST BE PERFORMED BY A DEALER OR SERVICE CENTER AUTHORIZED BY SHINDAIWA KOGYO CO., LTD. THE USE OF PARTS THAT ARE NOT EQUIVALENT IN PERFORMANCE AND DURABILITY TO AUTHORIZED PARTS MAY IMPAIR THE EFFECTIVENESS OF THE EMISSION CONTROL SYSTEM AND MAY HAVE A BEARING ON THE OUTCOME OF A WARRANTY CLAIM.
Shindaiwa Inc. 11975 SW Herman Road Tualatin, Oregon 97062 Telephone 503-692-3070 Fax 503-692-6696 www.shindaiwa.com Shindaiwa Kogyo Co., Ltd. 6-2-11 Ozuka-Nishi Asaminami-Ku, Hiroshima 731-3167, Japan Telephone 81-82-849-2220 Fax 81-82-849-2481 ©2002 Shindaiwa Inc. Part Number 68002-94310 Shindaiwa is a registered trademark of Shindaiwa Inc.