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Homelite UT10510 - page 1
OPERA T OR'S MANU AL 14 in. (356 mm) 33cc Chain Saw Model No. UT10510 Y our new chain sa w has been engineered and manuf actured to Homelite’ s high standard f or dependability , ease of operation, and operator saf ety . Properly cared for , it will giv e you years of rugged, troub le-free perf or mance. W ARNING: T o reduce the risk of inju ...
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Homelite UT10510 - page 2
Page 2 ■ ■ ■ ■ ■ Introduc tion ................................................................................................................... .................................................. 2 ■ ■ ■ ■ ■ General Saf ety Rules .................................................................................................. ...
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Homelite UT10510 - page 3
Page 3 W ARNING: The warnings, labels, and instructions found in this section of the operator's manual are for your safety. Failure to follow all instructions may result in serious personal injury. Safe operation of this tool requires that you read and understand this operator's manual and all labels affixed to the tool. Safety is a combi ...
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Homelite UT10510 - page 4
Page 4 W ARNING: The warnings, labels, and instructions found in this section of the operator's manual are for your safety. Failure to follow all instructions may result in serious personal injury. GENERAL PRECAUTIONS ■ ■ ■ ■ ■ DO NOT CUT VINES and/or small underbrush (less than 3 in./76 mm in diameter). ■ ■ ■ ■ ■ MUFFLER S ...
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Homelite UT10510 - page 5
Page 5 PULL PUSH Fig. 1 PUSH AND PULL See Figure 1. The reaction f orce is always opposite to the direction the chain is moving. Thus, the oper ator must be ready to control the PULL when cutting on the bottom edge of the bar and the PUSH when cutting along the top edge. MAINTENANCE PRECAUTIONS Ne ver operate a chain sa w that is damaged, improper ...
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Homelite UT10510 - page 6
Page 6 SYMBOLS Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer. SYMBOL NAME EXPLANATION Indicates danger, warning or caution. It means attention!!! Your safety is involved. Your manual contains spe ...
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Homelite UT10510 - page 7
Page 7 Weight - No bar, chain, fuel or oil ............................................................................................ ............... 9.7 lbs. (4.4 kg) Fuel tank volume ............................................................................................................... ..................... 19.4 oz. (575 ml) Chain oil t ...
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Homelite UT10510 - page 8
Page 8 STOP Fig. 2 FRONT HAND GUARD THROTTLE LOCK BUTTON TRIGGER RELEASE REAR HANDLE THROTTLE TRIGGER IGNITION SWITCH FUEL CAP CHAIN OIL CAP STARTER/FAN HOUSING STARTER GRIP SAFE-T-TIP PRIMER BULB CHOKE LEVER FEA TURES FRONT HANDLE CYLINDER COVER BAR MOUNTING NUTS CLUTCH COVER ...
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Homelite UT10510 - page 9
Page 9 W ARNING: The warnings and instructions in this section of the operator's manual are for your safety and to prevent serious personal injury. UNDERSTANDING YOUR CHAIN SAW SAFETY DEVICES SAFE-T-TIP ANTI-KICKBACK NOSE GUARD See Figure 3. The SAFE-T -TIP prev ents kickback because it co vers the tip of the bar where rotational kickback is g ...
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Homelite UT10510 - page 10
Page 10 W ARNING: Always shut off engine before fueling. Never add fuel to a machine with a running or hot engine. Move at least 30 ft. (9 m) from refueling site before starting the engine. DO NOT SMOKE! Failure to heed this warning can result in possible personal injury. FUEL AND REFUELING HANDLING THE FUEL SAFELY W ARNING: Check for fuel leaks, i ...
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Homelite UT10510 - page 11
Page 11 STOP STOP STOP ADDING OIL See Figure 7. Use HOMELITE Bar and Chain Oil. It is designed for chains and chain oilers, and is formulated to perform over a wide temperature range with no dilution required. Chain saw should use approximately one tank of oil per tank of fuel. Note: Do not use dirty, used or otherwise contaminated oils. Damage may ...
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Homelite UT10510 - page 12
Page 12 STOP STOP Fig. 11 FULL CHOKE CHOKE LEVER HALF CHOKE RUN POSITION Fig. 12 THROTTLE TRIGGER THROTTLE LOCK BUTTON TRIGGER RELEASE Fig. 13 Fig. 14 THROTTLE TRIGGER TRIGGER RELEASE STARTER GRIP STARTING THE ENGINE: 3. Set the ignition switch to the RUN (I) position. 4. Fully press and release the PRIMER BULB 7 times. 5 . Pull CHOKE lever all the ...
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Homelite UT10510 - page 13
Page 13 STOP STOP 7 . When the temperature is above 50° F, pull the STARTER GRIP until the engine attempts to start, but no more than 3 times. When the temperature is below 50° F, pull the STARTER GRIP until the engine attempts to start, but no more than 5 times. 8. Push CHOKE lev er to half choke position. 9. Pull ST AR TER GRIP until engine r u ...
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Homelite UT10510 - page 14
Page 14 PREPARING FOR CUTTING PROPER GRIP ON HANDLES See Figures 16 and 17. Ref er to “Specific Saf ety Rules – Safety Apparel” earlier in this manual for appropriate safety equipment. ■ ■ ■ ■ ■ W ear non-slip glov es for maximum grip and protection. ■ ■ ■ ■ ■ Hold the saw firmly with both hands. Always k eep your LEFT HAN ...
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Homelite UT10510 - page 15
Page 15 STOP STOP BASIC OPERATING/CUTTING PROCEDURES Practice cutting a f ew small logs using the f ollowing technique to get the “feel” of using your saw before you begin a major sawing operation. 1. T ake the proper stance in front of the wood with the sa w idling. 2. Accelerate the engine to full throttle just before entering the cut by sque ...
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Homelite UT10510 - page 16
Page 16 STOP W ARNING: Weather conditions and altitude may affect carbure- tion. Do not allow bystanders close to the chain saw while adjusting the carburetor. ADJUSTING IDLE SPEED ■ ■ ■ ■ ■ If the engine starts, runs, and accelerates but will not idle, turn the idle speed screw “ T ” clockwise to increase idle speed. ■ ■ ■ ■ ...
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Homelite UT10510 - page 17
Page 17 135° 135° FROM PLANNED LINE OF FALL PATH OF SAFE RETREAT PLANNED LINE OF FALL PATH OF SAFE RETREAT PLANNED LINE OF FALL Fig. 23 Fig. 24 OPERA TION PROPER PROCEDURE FOR TREE FELLING See Figures 23 through 27. 1. Pick your escape route (or routes in case the in- tended route is blocked). Clear the immediate area around the tree and make sur ...
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Homelite UT10510 - page 18
Page 18 4. Make the backcut level and horizontal, and at a mini- mum of 2 inches (5 cm) above the horizontal cut of the notch. Note: Never cut through to the notch. Always leave a band of wood between the notch and back cut (approxi- mately 2 inches (5 cm) or 1/10 the diameter of the tree). This is called "hinge" or "hingewood". ...
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Homelite UT10510 - page 19
Page 19 REMOVING BUTTRESS ROOTS See Figure 28. A b uttress root is a large root e xtending from the trunk of the tree above the ground. Remove large buttress roots prior to felling. Make the horizontal cut into the buttress first, followed by the vertical cut. Remove the resulting loose section from the work area. Follow the correct tree felling pr ...
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Homelite UT10510 - page 20
Page 20 BUCKING LOGS UNDER STRESS Make the first b ucking cut 1/3 of the wa y 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 pre ...
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Homelite UT10510 - page 21
Page 21 LIMBING AND PRUNING See Figure 33. ■ Work slowly, keeping both hands on the saw with a firm grip. Maintain secure footing and balance. ■ Keep the tree between you and the chain while limbing. ■ Do not cut from a ladder, this is extremely dangerous. Leave this operation for professionals. ■ Do not cut above chest height as a saw held ...
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Homelite UT10510 - page 22
Page 22 ASSEMBLING THE BAR AND CHAIN See Figures 36 through 44. D ANGER: 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. W ARNING: To avoid serious personal injury, read and under- stand ...
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Homelite UT10510 - page 23
Page 23 6. Lay out the saw chain in a loop and straighten any kinks. The cutters should face in the direction of chain rotation. If the y face bac kwards , turn the loop over . 7. Place the chain drive links into the bar groove as shown. 8. Position the chain so there is a loop at the back of the bar. 9. Hold the chain in position on the bar and pl ...
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Homelite UT10510 - page 24
Page 24 11. Replace the outer guide bar plate ensuring that the bar pin groove is at the bottom with the upper and lower edges angled away from the guide bar. 12. Replace the clutch cover and bar mounting nuts. 13. Tighten the bar mounting nuts finger tight only. The bar must be free to move for tension adjustment. 14. Remove all slack from the cha ...
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Homelite UT10510 - page 25
Page 25 ADJUSTING THE CHAIN TENSION See Figures 45, 46, and 47. W ARNING: Never touch or adjust the chain while the motor is running. The saw chain is very sharp. Always wear protective gloves when performing maintenance on the chain. 1. Stop the engine before setting the chain tension. 2. Make sure the guide bar nuts are loosened to finger tight, ...
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Homelite UT10510 - page 26
Page 26 Fig. 48 Fig. 49 RAKER CLEARANCE INSPECT DRIVE SPROCKET CUTTING CORNER SIDE PLATE DEPTH GAUGE TOE GULLET HEEL RIVET HOLE TOP PLATE SHARPENING THE CUTTERS See Figures 50 through 54. 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. 1. Wear gloves f ...
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Homelite UT10510 - page 27
Page 27 Fig. 52 Fig. 53 LEFT HAND CUTTERS RIGHT HAND CUTTERS Fig. 54 CAUTION: A dull or improperly sharpened chain can cause excessive engine speed during cutting which may result in severe engine damage. W ARNING: Improper chain sharpening increases the potential of kickback. W ARNING: Failure to replace or repair a damaged chain can cause serious ...
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Homelite UT10510 - page 28
Page 28 TOP PLATE FILING ANGLE See Figure 55. ■ CORRECT 30° - file holders are marked with guide marks to align file properly to produce correct top plate angle. ■ LESS THAN 30° – for cross cutting. ■ MORE THAN 30° – feathered edge dulls quickly. SIDE PLATE ANGLE See Figure 56. ■ CORRECT 80 o – Produced automatically if you use the ...
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Homelite UT10510 - page 29
Page 29 Fig. 60 LUBRICATING HOLE MAINTAINING THE GUIDE BAR See Figure 60. CA UTION: Make sure the chain has stopped before 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 t ...
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Homelite UT10510 - page 30
Page 30 STOP STOP MOUNTING THE SAFE-T-TIP® NOSE GUARD See Figures 61 and 62. 1. Mount the SAFE-T-TIP on the bar nose. 2. Fit the locking rivet or tab in the recessed hole in the guide bar. 3. Tighten the screw with your finger. 4. From the finger tight position, tighten the screw an additional 3/4 of a turn using a wrench. CLEANING THE AIR FILTER ...
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Homelite UT10510 - page 31
Page 31 STOP STOP STOP STOP CLEANING THE ENGINE See Figures 67 and 68. 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. W ARNING Never run the saw without all the parts, including the drivecase cover and starter housing, securely i ...
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Homelite UT10510 - page 32
Page 32 CLEANING THE SPARK ARRESTING MUFFLER See Figure 71. The muffler is equipped with a spark arrestor screen. A faulty spark arrestor screen can create a fire hazard. Through normal use the screen can become dirty and should be inspected weekly and cleaned as required. Alwa ys keep the muffler and spark arrestor on your sa w in good condition. ...
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Homelite UT10510 - page 33
Page 33 Length of Bar Guide Bar Part Number Chain Part Number 14 in. P ower Tip PS06331 984296005 16 in. P ower Tip PS06338 PS06285 B AR AND CHAIN COMBINA TIONS TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION Engine will not start. (Make sure Ignition Switch is in start position “I”.) Engine starts but will not accelerate properly. Engine start ...
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Homelite UT10510 - page 34
Page 34 STOP Note: The carburetor adjustment needle(s) are equipped with plastic cap(s) that prevent counterclockwise rotation from the original factory adjustment. If your product exhibits specific perf or mance problem(s) where the T roubleshooting Section recommends a counterclockwise needle adjustment and you have made no adjustments since the ...
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Homelite UT10510 - page 35
Page 35 W ARRANTY CALIFORNIA EMISSION CONTROL LIMITED W ARRANTY ST A TEMENT Y OUR W ARRANTY RIGHTS AND OBLIGA TIONS HOMELITE CONSUMER PRODUCT , INC. The U .S. Environmental Protection Agency (EP A), the Calif or nia Air Resources Board (CARB), and Homelite Consumer Products, Inc. are pleased to explain the Emission Control System W arranty on your ...
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Homelite UT10510 - page 36
For product information, technical help, dealer locations or parts ordering information visit our website at: www .homelite.com. HOMELITE CONSUMER PRODUCTS, INC. 1428 Pearman Dairy Road, Anderson, SC 29625 Post Office Box 1207, Anderson, SC 29622 Phone 1-800-chainsaw (1-800-242-4672) www.homelite.com OPERA T OR'S MANU AL 14 in. (356 mm) 33cc C ...
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