Homelite UT10517 Operator'S Manual Download Page 1

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OPERATOR’S MANUAL

UT10517 / 18 in. 42cc Chain Saw

UT10518 / 18 in. 46cc Chain Saw

UT10520 / 20 in. 46cc Chain Saw

SAVE THIS MANUAL FOR FUTURE REFERENCE

Your chain saw has been engineered and manufactured to Homelite’s high standard for dependability, ease of operation,
and operator safety. When properly cared for, it will give you years of rugged, trouble-free performance.

WARNING:

To reduce the risk of injury, the user must read and understand the operator’s manual before using

this product.

Thank you for buying a Homelite product.

Summary of Contents for UT10517

Page 1: ...as been engineered and manufactured to Homelite s high standard for dependability ease of operation and operator safety When properly cared for it will give you years of rugged trouble free performance WARNING To reduce the risk of injury the user must read and understand the operator s manual before using this product Thank you for buying a Homelite product ...

Page 2: ...ce 22 32 Bar and Chain Combinations 33 Troubleshooting 33 34 Warranty 35 37 Parts Ordering Service Back Page This product has many features for making its use more pleasant and enjoyable Safety performance and dependability have been given top priority in the design of this product making it easy to maintain and operate table of contents introduction ...

Page 3: ...tired or under the influence of medication drugs or alcohol Use safety footwear Wear snug fitting clothing protective gloves and eye hearing and head protection devices Heavy protective clothing may increase operator fatigue which could lead to heat stroke During weather that is hot andhumid heavyworkshouldbescheduledforearlymorning or late afternoon hours when temperatures are cooler Do not stand...

Page 4: ...ompletely and securely assembled Be sure that the saw chain stops moving when the throttle control trigger is released If the saw chain moves at idle speed the carburetor may need adjusting Refer to Adjusting the Carburetor in the Maintenance section of this manual If the saw chain still moves at idle speed after adjustment has been made contact an authorized service center for adjustment and disc...

Page 5: ...nd Oil Use unleaded gasoline intended for motor vehicle use with an octane rating of 87 R M 2 or higher This product is powered by a 2 cycle engine and requires pre mixing gasoline and 2 cycle oil Wear non slip heavy duty protective gloves when handling the chain saw Avoid bar nose contact Danger Beware of kickback Engines produce carbon monoxide which is an odorless deadly poison Do not operate i...

Page 6: ...tuation which if not avoided may result in minor or moderate injury CAUTION Without Safety Alert Symbol Indicates a situation that may result in property damage WARNING To avoid serious personal injury do not attempt to use this product until you read thoroughly and understand com pletely the operator s manual If you do not understand the warnings and instructions in the operator s manual do not u...

Page 7: ...he wood closes in and pinches the moving saw chain in the cut along the top of the guide bar Kickback Rotational The rapid upward and backward motion of the saw which can occur when the moving saw chain near the upper por tion of the tip of the guide bar contacts an object such as a log or branch Low Kickback Chain A chain that complies with the kickback performance requirements of ANSI B175 1 whe...

Page 8: ...520 Standard Fig 1a Engine displacement 46cc Chain gauge 050 in Drive sprocket 10 tooth Engine power 2 5 HP min Idle engine speed 2 600 3 400 r min RPM Fuel tank capacity 19 4 oz Chain oil tank capacity 11 8 oz Weight No bar chain fuel or oil 10 lbs Front hand guard Chain Brake Front handle Cylinder cover Trigger RELEASE Chain oil cap Safe t tip Primer bulb CHOKE LEVER bar mounting nuts ...

Page 9: ...hould stop immediately The chain brake does not prevent kickback GUIDE BAR The factory equipped guide bar has a small radius tip that offers a somewhat lower kickback potential LOW KICKBACK SAW CHAIN The low kickback saw chain helps minimize the force of a kickback reaction by preventing the cutters from digging in too deeply at the kickback zone primER bulb The primer bulb pumps fuel from the fue...

Page 10: ...lt in serious personal injury WARNING Do not attempt to modify this product or create acces sories not recommended for use with this product Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury NOTE The chain saw has been fully factory tested It is normal to find some slight oil residue on the saw Read and remove all ha...

Page 11: ...il containing a fuel stabilizer is recommended operation PREMIUM EXACT MIX 50 1 GASOLINE OIL 1 Gallon US 2 6 oz 1 Liter 20 cc 20 ml OXYGENATED FUELS Some conventional gasolines are blended with alcohol or an ether compound These gasolines are collectively referred to as oxygenated fuels To meet clean air standards some areas of the United States and Canada use oxygenated fuels to help reduce emiss...

Page 12: ...Note Do not use dirty used or otherwise contaminated oils Damage may occur to the oil pump bar or chain n Carefully pour the bar and chain oil into the oil tank n Fill the oil tank every time you fuel the engine OPERATING THE CHAIN BRAKE See Figures 4 5 Check the operating condition of the chain brake prior to each use n Using the back of your left hand engage the chain brake by pushing the chain ...

Page 13: ...e To start the engine n Set the ignition switch to the RUN I position n Make sure the chain brake is in the run position by pulling back on the lever hand guard n Fully press and release the primer bulb 7 times n Pull choke lever all the way out to FULL position The partial throttle position is automatically set when the choke lever is set at full choke n When the temperature is above 50 F pull th...

Page 14: ...e the ignition switch to the stop position Do not put the chain saw on the ground when the chain is still moving For additional safety set the chain brake when the saw is not in use In the event that the ignition switch will not stop the saw pull the choke lever out to the fully extended position Full Choke and engage chain brake to stop the engine If the ignition switch will not stop the saw when...

Page 15: ... the PULL when cutting on the bottom edge of the bar and the PUSH when cutting along the top edge Note The chain saw has been fully factory tested It is normal to find some slight oil residue on the saw WARNING KICKBACK occurs when the moving chain contacts an object at the upper portion of the tip of the guide bar or when the wood closes in and pinches the saw chain in the cut Contact at the uppe...

Page 16: ... is to the left of the chain line WARNING Never use a left handed cross handed grip or any stance that would place your body or arm across the chain line n Maintain a proper grip on the saw whenever the engine is running The fingers should encircle the handle and the thumb is wrapped under the handlebar This grip is least likely to be broken by a kickback or other sudden reaction of the saw Any gr...

Page 17: ...event being pulled off balance n Do not cut above chest height as a saw held higher is difficult to control against kickback forces n Do not fell trees near electrical wires or buildings Leave this operation for professionals n Cut only when visibility and light are adequate for you to see clearly BASIC OPERATING CUTTING PROCEDURES Practicecuttingafewsmalllogsusingthefollowingtechnique to get the ...

Page 18: ...your planned path of retreat Clear the path of safe retreat approximately 135 from the planned line of fall n Consider the force and direction of the wind the lean and balance of the tree and the location of large limbs These things influence the direction in which the tree will fall Do not try to fell a tree along a line different from its natural line of fall n Cut a notch about 1 3 the diameter...

Page 19: ... extending from the trunk of the tree above the ground Remove large buttress roots prior to felling Makethehorizontalcutintothebuttressfirst followed by the vertical cut Remove the resulting loose section from the work area Follow the correct tree felling procedure as stated in Proper Procedure For Tree Felling after you have removed the large buttress roots BUCKING See Figure 27 Bucking is the te...

Page 20: ...cking cut 1 3 of the way through the log and finish with a 2 3 cut on the opposite side As you cut the log it will tend to bend The saw can become pinched or hung in the log if you make the first cut deeper than 1 3 of the diameter of the log Give special attention to logs under stress to prevent the bar and chain from pinching OVERBUCKING See Figure 30 Begin on the top side of the log with the bo...

Page 21: ...e limb further out to reduce the weight This prevents stripping the bark from the main member Underbuck the branch 1 3 through for your first cut Overbuck the branch to drop it Finish by cutting smoothly and neatly against the main member so the bark will grow back to seal the wound WARNING If the limbs to be pruned are above chest height hire a professional to perform the pruning CUTTING SPRINGPO...

Page 22: ... lubrication is required REPLACING THE guide BAR AND CHAIN See Figures 35 44 DANGER Never start the engine before installing the guide bar chain drivecase cover and clutch drum Without all these parts in place the clutch can fly off or explode exposing the user to possible serious injury WARNING To avoid serious personal injury read and understand all the safety instructions in this section n Alwa...

Page 23: ...groove as shown n Position the chain so there is a loop at the back of the bar n Hold the chain in position on the bar and place the loop around the sprocket n Fit the bar flush against the mounting surface so that the bar studs are in the long slot of the bar Note When placing the bar on the bar studs ensure that the adjusting pin is in the chain tension pin hole bar groove chain drive links aDJU...

Page 24: ...ned when there is no sag on the underside of the guide bar the chain is snug but it can be turned by hand without binding Ensure that the chain brake is not set Note If chain is too tight it will not rotate Loosen the bar nuts slightly and turn the tension adjuster 1 4 turn counter clockwise Lift the tip of the guide bar up and retighten the bar nuts securely Ensure that the chain will rotate with...

Page 25: ...nd fast cutting maintain the chain properly The chain requires sharpening when the wood chips are small and powdery the chain must be forced through the wood during cutting or the chain cuts to one side During maintenance of the chain consider the following n Improper filing angle of the side plate can increase the risk of severe kickback n Raker depth gauge clearance Too low increases the potenti...

Page 26: ...ile dip or rock n Using light but firm pressure Stroke towards the front corner of the tooth n Lift the file away from the steel on each return stroke n Put a few firm strokes on every tooth File all left hand cutters in one direction Then move to the other side and file the right hand cutters in the opposite direction n Remove filings from the file with a wire brush CAUTION A dull or improperly s...

Page 27: ...oo small or a file held too low n BACKWARD SLOPE Needs too much feed pressure causes excessive wear to the bar and chain Results from using a file with a diameter too large or file held too high Fig 56 MAINTAINING DEPTH GAUGE CLEARANCE See Figure 56 58 n Maintain the depth gauge at a clearance of 025 in Use a depth gauge tool for checking the depth gauge clear ances n Every time the chain is filed...

Page 28: ...4 of a turn using a wrench MAINTAINING THE SAFE T TIP NOSE GUARD See Figures 60 61 CAUTION Make sure the chain has stopped before you do any work on the saw WARNING Although the guide bar comes with a SAFE T TIP anti kickback device already installed check the tightness of the mounting screw before each use Use the following instructions to tighten the mounting screw of the nose guard These are sp...

Page 29: ... dislodge most saw dust and dirt particles n After every 5 hours of operation clean in warm soapy water rinse and let dry completely Replace with a new filter after every 25 hours of use Note An alternate method is to clean the filter with compressed air Always wear eye protection to avoid eye injury n Reinstall the air filter making sure that the tabs on the air filter are located in channels on ...

Page 30: ...w while adjusting the carburetor IdleSpeedAdjustment Theidlespeedadjustmentcontrols how much the throttle valve stays open when the throttle trigger is released To adjust n Turn idle speed screw T clockwise to increase idle speed n Turn idle speed screw T counterclockwise to decrease idle speed WARNING THE SAW CHAIN SHOULD NEVER TURN AT IDLE Serious personal injury may result from the saw chain tu...

Page 31: ...These deposits may need to be removed to restore performance We highly recommend that only qualified service technicians perform this service CHECKING THE FUEL FILTER See Figure 70 Check the fuel filter periodically Replace it if contaminated or damaged REPLACING THE SPARK PLUG See Figure 71 This engine uses a Champion RCJ 4 with 025 in electrode gap Use an exact replacement and replace every 50 h...

Page 32: ...ays keep the chain brake mechanism clean and lightly lubricate the linkage n Always test the chain brake performance after servicing or cleaning Refer to Operating Chain Brake for additional information n Check the chain catcher and replace if damaged WARNING Even with daily cleaning of the mechanism the depend ability of a chain brake to perform under field conditions cannot be certified Keep the...

Page 33: ...zed service center for carburetor adjustment Engine does not reach full speed and or emits excessive smoke Oil fuel mixture incorrect Air filter is dirty Spark arrestor screen is dirty Carburetor requires H High Jet adjustment Use fresh fuel and the correct 2 cycle oil mix ratio Clean air filter Refer to Cleaning the Air Filter in the Maintenance section of this manual Clean spark arrestor screen ...

Page 34: ... is not rotating Chain brake is engaged Chain tension is too tight Guide bar and chain assembled incorrectly Guide bar and or chain are damaged Drive sprocket teeth damaged Release chain brake Refer to Operating the Chain Brake in the Operation section of this manual Tension chain per instructions in Adjusting the Chain Tension in the Maintenance section of this manual Refer to Replacing the Guide...

Page 35: ...s not extend to repairs made necessary by normal wear or by the use of parts or accessories which are either incompatible with the homelite brand product or adversely affect its operation performance or durability In addition this warranty does not cover A Tune ups Spark Plugs Carburetor Carburetor Adjustments Ignition Filters B Wear items Bump Knobs Outer Spools Cutting Lines InnerReels StarterPu...

Page 36: ... warranted part that is not scheduled for replacement as required in the Emissions Maintenance Schedule and Warranty Parts List set forth below is warranted for two years If any such part including any part that is scheduled only for regular inspec tion fails during the period of warranty coverage it will be repaired or replaced at any HOMELITE Authorized Service Center at no charge Any such part ...

Page 37: ...s or Yearly or Yearly 50 Hours AIR FILTER ASSY includes Filter X X SPARK ARRESTOR X CARBURETOR ASSY includes Heat Dam Gaskets FUEL TANK ASSY includes Fuel Lines X Fuel Cap X Fuel Filter IGNITION ASSY includes Spark Plug X ALL EMISSIONS RELATED PARTS ARE WARRANTED FOR TWO YEARS OR FOR THE PERIOD OF TIME PRIOR TO THE PARTS FIRST SCHEDULED REPLACEMENT WHICH EVER COMES FIRST warranty ...

Page 38: ...ervice dealer Be sure to provide all relevant information when you call or visit For the location of the authorized service dealer nearest you please call 1 800 242 4672 or visit us online at www homelite com REPAIR PARTS The model number of this product is found on a plate or label attached to the housing Please record the serial number in the space provided below MODEL NUMBER ___________________...

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