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Summary of Contents for TB90BC

Page 1: ...n n mm m mum Operator s Manual 2 Cycle Gasoline Brushcutter Model TB90BC IMPORTANT READ SAFETY RULES AND INSTRUCTIONS CAREFULLY P N 769 00662 3 03 PRINTED IN USA ...

Page 2: ... This unit is factory equipped with a spark arrestor f it requires replacement Accessory Part 182747 Spark Arrestor Screen is available by contacting the service department This operator s manual is an important part of your new trimmer It will help you assemble prepare and maintain the unit for best performance Please read and understand what it says Before you start assembling your new equipment...

Page 3: ...all fasteners are in place and secure Replace cutting attachment parts that are cracked chipped or damaged in any way Make sure the cutting attachment is properly installed and securely fastened Be sure that the cutting attachment shield is properly attached and positioned as recommended Failure to do so can result in personal injury to the operator and bystanders as well as damage to the unit Be ...

Page 4: ... not run the engine at high speed when not cutting Always stop the engine when cutting is delayed or when walking from one cutting location to another If you strike or become entangled with a foreign object stop the engine immediately and check for damage Do not operate before repairing damage Do not operate the unit with loose or damaged parts Stop the unit switch the engine to off and disconnect...

Page 5: ...se nuts bolts or damage before continuing Repair or replace affected parts as necessary After Use Clean cutting blades with a household cleaner to remove any gum buildup Oil the blade with machine oil to prevent rust Lock up and store the cutting blade _nan appropriate area to protect the blade from unauthonzed use or damage OTHER SAFETY WARNINGS Never store a fueled unit inside a building where f...

Page 6: ...meeting ANSI Z87 1 standards and ear protection when operating this unit Use a full face shield when needed I KEEP BYSTANDERS AWAY WARNING Keep all bystanders especially children and pets at least 50 feet 15 m from the operating area UNLEADED FUEL Always use clean fresh unleaded fuel OIL Refer to operator s manual for the proper type of oil ON OFF STOP CONTROL ON START RUN HOT SURFACE WARNING Do n...

Page 7: ...e used with the TB90BC Refer to Operating the EZ Link System for a list of add ons Fuel Cap Starter Rope Grip Shaft Grip _ Throttle Lock Out Shoulder Strap Clip Throttle Control Blade Shield Shield Mount EZ Link TM Shaft Housing J Handle EZ Start TM Lever Air Filter Muffler Cover Brush Blade Cutting Attachment Shield Gear Housing _ Spark Plug Engine Stand Muffler Primer Bulb Cutting Attachment Lin...

Page 8: ...re installed Fig 2 6 While holding the unit in the operating position Fig 3 position the J handle to the location that provides you the best grip Fig 3 7 Tighten the clamp screws evenly until the J handle is secure INSTALL THE HARNESS WARNING Always use the shoulder I harness when using the cutting blade to avo d serous persona njury J 1 Push the strap through the center of the buckle 2 Pull the s...

Page 9: ...T AND INSTALL THE CUTTING BLADE NOTE To make cutting blade removal and installation easier place the unit on the ground or on a work bench Remove the Cutting Attachment Shield See Remove and Install the Cutting Attachment Shield Remove the Cutting Attachment WARNING The gear housing gets hot with 1 use It can result in injury to the operator I The housing remains hot for a short time even after th...

Page 10: ...gainst the shaft bushing Make sure that the blade is installed correctly then rotate the nut an additional 1 4 to 1 2 turn counterclockwise Fig 13 Clockwise Fig 14 4 Remove the nut blade retainer and blade Store the nut and blade together for future use in a secure place Store out of children s reach Install the Cutting Attachment 5 Align the shaft bushing hole with the locking rod slot and insert...

Page 11: ...ITERS 95 ml 1 LITER I 25 ml MIXING RATIO 40 1 WARNING Gasoline is extremely flammable Ignited Vapors may explode _ Always stop the engine and allow it to cool before filling the fuel tank Do not smoke while filling the tank Keep sparks and open flames at a distance from the area A WARNING Remove fuel cap slowly to avoid I _ I injury from fuel spray Never operate the unit _wthoutthe rue cap securey...

Page 12: ... and locks into place Fig 17 Crouch in the starting position and do not squeeze the throttle control Fig 18 Pull the starter rope up to 10 times briskly making sure the EZ Start rM lever is pushed to the left When the engine starts squeeze the throttle lock out and then squeeze the throttle control for 15 to 30 seconds This will warm up the unit The EZ Start TM Lever will click off automatically w...

Page 13: ...n installation or removal easier 1 Turn knob counterclockwise to loosen Fig 20 EZ LinkTMC upler Release Button Guide Recess Fig 19 2 While firmly holding the add on push it straight into the EZ Link TM coupler Fig 20 NOTE Aligning the release button with the guide recess will help installation Fig 19 Release Button EZ LinkTMCoupler Hole Upper Shaft Hous ng Lower Shaft Housing Fig 20 3 Turn the kno...

Page 14: ...atter Normal line fatigue Attempting to cut thick stalky weeds Forcing the line into objects such as walls or fence posts Fig 22 ADJUSTING TRIMMING LINE LENGTH The Bump Head TM cutting attachment allows you to release trimming line without stopping the engine To release more line lightly tap the cutting attachment on the ground Fig 23 while operating the trimmer at high speed NOTE Always keep the ...

Page 15: ...lls or binds This is _nore likely to occur in areas where it is difficult to see the material being cut Cut while swinging the upper part of your body from left to right Always release the throttle trigger and allow the engine to return to idle speed when not cutting When you are finished always unsnap the unit from the harness before taking off the harness _ ARNING The blade Continues to Spin aft...

Page 16: ...g process for the port FREQUENCY MAINTENANCE REQUIRED REFER TO Before starting engine Fill fuel tank with fresh fuel Page 11 Every 10 hours Clean and re oil air filter Page 18 Every 25 h0urs Check and clean spark arrestor Page 19 Check spark plug condition and gap Page 20 Every 50 hours Inspect exhaust port and spark arrestor screen for clogging or Page 19 obstruction to assure maximum performance...

Page 17: ...the inner reel and outer spool together While holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the reel Fig 31 Single Line Installation _ Go To Step 8 for SplitLine TM Installation 6 Take approximately 40 feet 12 2 m of new trimming line loop it into two equal lengths Insert each end of the line through one of the two holes in the ...

Page 18: ...ury I I always turn your trimmer off and allow i to I cool before you clean or service it 1 Remove the four 4 screws securing the air filter muffler cover Fig 36 Use a flat blade or T20 Torx bit screwdriver 2 Pull the cover from the engine Do not force Screws EZ StartT_ Lever _ rm L I I I L I I I I I I Fig 36 Screws Cleaning the Air Filter Clean and re oil the air filter every 10 hours of operatio...

Page 19: ... the spark arrestor from the muffler 5 Clean the spark arrestor with a wire brush Replace it if it is damaged or if it is impossible to clean thoroughly Fig 42 6 Reinstall the spark arrestor by pressing it into the recessed hole on the muffler s back side Make sure it fits tightly against the muffler and is not raised up 7 Place the exhaust gasket against muffler s back side Align the gasket bolt ...

Page 20: ... 43 Turn the idle speed screw in clockwise 1 8 of a turn ate time as needed until the engine idles smoothly NOTE The cutting attachment should not rotate when the engine idles 3 If the cutting attachment rotates when the engine idles turn the idle speed screw counterclockwise 1 8 of a turn at a time as needed to reduce idle speed Checking the fuel mixture cleaning the air filter and adjusting the ...

Page 21: ...Federal State and Local regulations 2 Start the engine and allow it to run until it stalls This ensures that all fuel has been drained from the carburetor 3 Allow the engine to cool Remove the spark plug and put 1 oz 30 ml of any high quality motor oil or 2 cycle oil into the cylinder Pull the starter rope slowly to distribute the oil Reinstall the spark plug NOTE Remove the spark plug and drain a...

Page 22: ...rized service dealer for an adjustment Stop the engine and clean the cutting attachment Clean or replace the air filter Clean or replace spark arrestor CAUSE Old or improperly mixed fuel Improper carburetor adjustment Fouled spark plug Plugged spark arrestor CAUSE Cutting attachment bound with grass Cutting attachment out of line Inner reel bound up Cutting head dirty Line welded Line twisted when...

Page 23: ...ousing Steel Tube EZ Link TM Throttle Control Finger Tip Trigger with Lock Out Approximate Unit Weight No fuel with J handle cutting attachment and shield 14 75 Ibs 6 5 kg Cutting Mechanism 4 Tooth Cutting Blade Dual String Cutting Head Line Spool Bump Line Releaser Line Spool Diameter 4 inches 101 6 mm Trimming Line Diameter 0 105 inch 2 67 mm Cutting Path Diameter Cutting Attachment 18 inches 45...

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Page 25: ...ufacturer s Warranty Coverage The warranty period begins on the date the engine or equipment is delivered to the retail purchaser The manufacturer warrants to the initial owner and each subsequent purchaser that the engine is free from defects in material and workmanship which cause the failure of a warranted part for a period of two years Repair or replacement of warranted part will be performed ...

Page 26: ...n Stand includes 37 Flywheel Assembly Spacer Recoil Pulley Recoil Spring Rope Guide Pulley Retainer Pull Handle Rope Pressure Plate Assembly includes 30 Plate Screw Item Part NO Description 31 753q203 Starter Housing Assembly includes 23_30 32 37 32 79 181862 Housing Screw 33 79 182368 Clutch Washer 34 791q 82369 Clutch Rotor Assembly 35 791 153592 Clutch Drum Assembly 36 753q 204 Clutch Cover Ass...

Page 27: ...182193 2 piece Gearbox Assembly includes 28 30 28 791 182195 Gearbox Mounting Hardware 29 791 145569 AntFRotation Screw 30 791 182196 Blade Driver 31 791 147492 Blade Shield Shield Mount 32 791 683304 Shield Mounting Screw 33 791 683299 Shield and Blade Assembly includes 34 34 791 682061 Blade Assembly 35 791 147490 Retaining Washer 36 791 612483 Spool Shaft 37 791 683301 Outer Spool and Eyelet As...

Page 28: ...nnels of export distribution Troy Bilt LLC reserves the right to change or improve the design of any Troy Bilt Product without assuming any obligation to modify any product previously manufactured No implied warranty including any implied warranty of merchantability or fitness for a particular purpose applies after the applicable period of express written warranty above as to the parts as identifi...

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