Homelite UT10517/18 manual

OPERA TOR’S MANUAL UT10517 / 18 in. 42cc Chain Saw UT10518 / 18 in. 46cc Chain Saw UT10520 / 20 in. 46cc Chain Saw SA VE THIS MANUAL FOR FUTURE REFERENCE Y our chain saw has been engineered and manufactured to Homelite’ s high standard for dependability , ease of operation, and operator safety . When properly car ed for , it will give you years[...]

P age 2  Introduction ..................................................................................................................................................................... 2   General Safety Rules ................................................................................................................................[...]

P age 3 WARNING: Read and understand all instructions . Failur e to follow all instructions listed below , may r esult in electric shock, fire and/or serious personal injury . READ ALL INSTRUCTIONS  Know your tool. Read the operato r’s ma nual carefully. Learn the saw’s ap plicat ions and li mitati ons as well as the s pecifi c pote ntial[...]

P age 4 SPECIFIC SAFETY RULES WARNING: The warnings, labels, and instructions found in this sec- tion of the operator’ s manual are for your safety . Failure to follow all instructions may result in serious personal injury .  Do not cut vines and/or small underbrush (a diameter of less than 3 in.).  Muffler surfaces are very hot durin[...]

P age 5 Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper inter - pretation of these symbols will allow you to operate the pr oduct better and safer . Read The Operator’ s Manual Safety Alert SYMBOL NAME DESIGNA TION/EXPLANA TION T o reduce the risk of injury , user must r ead and underst[...]

P age 6 SERVICE Servicing requir es extreme care and knowledge and should be performed only by a qualified service technician. For service we suggest you return the product to your nearest AUT HORIZ ED SER VIC E CENT ER for rep air . Wh en serv icing , use only identical replacement parts. WARNING: SA VE THESE INSTRUCTIONS The following signal word[...]

P age 7 GLOSSAR Y OF TERMS Bucking The pr ocess of cr oss cutting a felled tr ee or log into lengths. Chain Brake A device used to stop the saw chain. Chain Saw Powerhead A chain saw without the saw chain and guide bar . Clutch A mechanism for connecting and disconnecting a driven member to and from a r otating source of power . Drive Sprocket or S[...]

P age 8 PRODUCT SPECIFICA TIONS FEA TURES Bar length: UT10517, UT10518 .................................................18 in. UT10520 .................................................................20 in. Chain pitch: UT10517 ............................................................. .375 in. UT10518, UT10520 ..................................[...]

P age 9 FEA TURES Fig. 1b KNOW YOUR CHAIN SAW See Figures 1a - 1b . The safe use of this product requir es an understanding of the information on the tool and in this operator’ s manual as well as a knowledge of the pr oject you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules. CHOKE LE[...]

P age 10 WARNING: Do not allow familiarity with this product to make you ca re le ss. Re me mb er tha t a ca re le ss fra ct ion of a sec ond is sufficient to inflict serious injury . WARNING: Always wear safety goggles or safety glasses with side shields when operating power tools. Failure to do so coul d re sult in object s bein g thr own int o y[...]

P age 11 FUEL AND REFUELING HANDLING THE FUEL SAFEL Y WARNING: Chec k for fuel leaks . If any are found, corr ect them befor e using the saw to prevent fir e or bur n injury .  Always handle fuel with care; it is highly flammable.  Always refuel outdoors and do not inhale fuel vapors.  Do not let gasoline or oil come in contact wi[...]

P age 12 RUN POSITION FILLING THE FUEL T ANK See Figure 2.  Clean the surface around the fuel cap to prevent con- tamination.  Loosen the fuel cap slowly.  Carefully pour the fuel mixture into the tank. Avoid spill- age.  Prior to replacing the fuel cap, clean and inspect the o-ring.  Immediately replace the fuel cap a[...]

P age 13 RUN POSITION ST ARTER GRIP OPERA TION ST ARTING THE ENGINE See Figures 6 - 11. Starting the product differs depending on whether the engine is cold or warm. WARNING: Kee p your body to the left of the chain line . Never str add le the saw or chain, or lean over past the chain line.  Place the chain saw on level ground and ensure that[...]

P age 14 BRAKE POSITION OPERA TION  Pull starter grip until engine runs. NOTE: Allow the saw to run in this position 15-30 sec- onds, depending upon the temperature.  Squeeze and release the throttle trigger to return the engine to idle after a total run time of at least 30 seconds. CAUTION: Failure to release partial throttle when chai[...]

P age 15 ADJUSTING IDLE SPEED See Figure 15.  If the engine starts, runs, and accelerates, but will not idle, turn the idle speed screw “T” clockwise to increase idle speed.  If the chain turns at idle, turn the idle speed screw “T” counterclockwise to reduce the idle RPM and stop the ch ain move ment . If the saw chai n sti ll [...]

P age 16 OPERA TION KICKBACK PRECAUTIONS See Figures 17 - 18. Rotational kickback occurs when the moving chain contacts an object at the Kickback Danger Zone of the guide bar . The result is a lightning-fast reverse reaction, which kicks the guide bar up and back towar ds the operator . This re action can cause loss of control, which can r esult in[...]

P age 17 Fig. 20 Fig. 21 OPERA TION PROPER CUTTING ST ANCE See Figure 20.   Balance your weight with both feet on solid ground.  Keep left arm with elbow locked in a “straight arm” posi- tion to withstand any kickback force.  Keep your body to the left of the chain line.  Keep your thumb on underside of handlebar. WOR[...]

P age 18 OPERA TION FELLING TREES HAZARDOUS CONDITIONS WARNING: Do not fell tr ees during periods of high wind or heavy precipitation. Wait until the hazardous weather has ended. When felling a tree, it is important that you heed the following warnings to prevent possible serious injury .   Do not cut down trees having an extreme lean or l[...]

P age 19 WEDGE Fig. 25 HORIZONT AL CUT VERTICAL CUT LOOSE SECTION Fig. 26 Fig. 27 OPERA TION  On large diameter trees, stop the back cut before it is deep enough for the tree to either fall or settle back on the stu mp. The n ins ert soft woode n or pla stic wedge s into the cut so they do not touch the chain. Drive wedges in, little by little, [...]

P age 20 OPERA TION BUCKING WITH A WEDGE See Figure 28. If the wood diameter is lar ge enough for you to insert a soft bucking wedge without touching the chain, you should use the wedge to hold the cut open to prevent pinching. NOTE: When bucking or felling with a wedge, you may need to remove the SAFE-T-TIP anti-kickback device to allow the bar to[...]

P age 21 UNDERBUCKING See Figure 31. Begin on the under side of the log with the top of the saw against the log; exert light pressure upward. During under- buc king , the saw will tend to push back at you. Be prepa red for this reaction and hold the saw firmly to maintain control. LIMBING AND PRUNING See Figures 32 - 33.  Work slowly, keeping[...]

P age 22 RUN POSITION WARNING: When servicing, use only identical Homelite replaceme nt parts. Use of any other parts may create a hazard or cause product damage. WARNING: Always wear safety goggles or safety glasses with side shields during power tool operation or when blowing dust. If operation is dusty , also wear a dust mask. GENERAL MAINTENANC[...]

P age 23 CUTTERS CHAIN ROT A TION CHAIN DRIVE LINKS Fig. 41 Fig. 39 MAINTENANCE Fig. 38 Fig. 40  Lay out the new saw chain in a loop and straighten any kinks. The cutters should face in the direction of chain rotation. If they face backwards, turn the loop over.  Place the chain drive links into the bar groove as shown.  Position [...]

P age 24 MAINTENANCE Fig. 42 Fig. 43 Fig. 44  Rep lace the oute r guide bar pla te ensu rin g that the bar pin groove is at the bottom with the upper and lower edges angled away from the guide bar.  Replace the clutch cover and bar mounting nuts.  Finger-tighten the bar mounting nuts. The bar must be free to move for tension adjus[...]

P age 25 Fig. 48 ≈ .050 in. Fig. 47 Fig. 46 Fig. 49 MAINTENANCE  Retension the chain whenever the flats on the drive links hang out of the bar groove. NOTE: During normal saw operation, the temperature of the chain increases. The drive links of a correctly ten- sioned warm chain will hang approximately .050 in. out of the bar groove. The ti[...]

P age 26 MAINTENANCE SHARPENING THE CUTTERS See Figures 50 - 53. Be careful to file all cutters to the specified angles and to the same length, as fast cutting can only be obtained when all cutters are uniform. WARNING: The saw chain is very sharp. Always wear protective gloves when performing maintenance to the chain to prevent serious personal in[...]

P age 27 INCORRECT MORE THAN 30° TOP PLA TE FILING ANGLE LESS THAN 30° Fig. 54 30° CORRECT INCORRECT BACKWARD SLOPE SIDE PLA TE FILING ANGLE Fig. 55 80° CORRECT HOOK FLA T FILE DEPTH GAUGE JOINTER Fig. 57 RESTORE ORIGINAL SHAPE BY ROUNDING THE FRONT Fig. 58 MAINTENANCE TOP PLA TE FILING ANGLE See Figure 54.  CORRECT 30° – file holders [...]

P age 28 MAINTENANCE MAINT AINING THE GUIDE BAR See Figure 59. CAUTION: Make sure the chain has stopp ed befo re you do any work on the saw. Every week of use, reverse the guide bar on the saw to distribute the wear for maximum bar life. The bar should be cleaned every day of use and checked for wear and damage. Feathering or burring of the bar rai[...]

P age 29 MAINTENANCE CLEANING THE AIR FIL TER See Figures 62 - 64.  For access to the air filter and carburetor area, loosen the three screws holding the cylinder cover.  Activate chain brake.  Lift the front of the cylinder cover past chain brake lever.  Lift the back of the cylinder cover past the handle.  Before rem[...]

P age 30 MAINTENANCE ADJUSTING THE CARBURETOR See Figures 65 - 67. Before adjusting the carbur etor:  Use a brush or compressed air to clean the starter cover vents.  Clean the air filter. Refer to Cleaning the Air Filter in the Maintenance section of this manual.  Allo w the engine to warm up prior to adjust ment of engi ne idle [...]

P age 31 CLEANING THE ENGINE See Figures 68 - 69. Clean the cylinder fins and flywheel fins with compressed air or a brush periodically. Dangerous overheating of the engine may occur due to impurities on the cylinder. WARNING Never run the saw without all the parts, including the drivecase cover and starter housing, securely in place. Because parts[...]

P age 32 INSPECTING/CLEANING THE SP ARK ARRESTOR SCREEN See Figure 72. The muffler is equipped with a spark arrestor screen. A faulty spar k arr esto r scr een can crea te a fir e haza r d. Throug h normal use the screen can become dirty and should be inspected weekly and cleaned as required. Always keep the muffler and spark arrestor on the saw in[...]

P age 33 TROUBLESHOOTING Pr oblem Possible Cause Solution En gine wi ll no t s tart . [Make sure ignition switch is in the RUN ( l ) position.] No spark. Engine is flooded. Clean or r eplace spark plug. Reset spark plug gap. Refer to Spark Plug Replacement earlier in this manual. With the ignition switch OFF , remove spark plug. Move choke lever to[...]

P age 34 TROUBLESHOOTING Pr oblem Possible Cause Solution Bar and chain running hot and smoking. Chain oil tank empty . Chain tension is too tight. Oiler is not functioning. Oil tank should be filled every time fuel tank is filled. T ension chain per instructions in Adjusting the Chain T ension in the Maintenance section of this manual. Run at half[...]

P age 35 LIMITED WARRANTY ST A TEMENT Homelite Consumer Products, Inc., (“Homelite”) warrants to the original r etail purchaser that this HOMELITE brand outdoor pr oduct is fr ee from defect in material and workma nship and agrees to re pair or rep lace, at Homeli te’ s, discr etion, any defecti ve produc t fr ee of char ge within these time [...]

P age 36 W ARRANTY THE FOLLOWING CALIFORNIA AIR RESOURCES BOARD (CARB) ST A TEMENT ONL Y APPLIES TO MODEL NUMBERS REQUIRED TO MEET THE CARB REQUIREMENTS. The U.S. Environmental Protection Agency (EP A), the Califor nia Air Resources Board (CARB), and Homelit e Consumer Produc ts, Inc., are pleased to explain the Emissions Contr ol System W arranty [...]

P age 37 EMISSIONS MAINTENANCE SCHEDULE AND WARRANTED P ARTS LIST Emissions Parts Inspect Clean Replace Clean Every Replace Before Every Every 25 Hours 25 Hours Every Each Use 5 Hours or Y early or Y early 50 Hours AIR FIL TER ASSY includes: Filter .................................................................. X ............................X SP[...]

HOMELITE CONSUMER PRODUCTS, INC. 1428 Pearman Dairy Road Anderson, SC 29625 Phone 1-800-242-4672 www .homelite.com WARNING: The engine exhaust from this product contains chemicals known to the State of California to cause cancer , birth defects, or other repr oductive harm. CALIFORNIA PROPOSITION 65 SERVICE For parts or service, contact your neares[...]