OPERATOR’S MANUAL CSP3816 - UT74123D - 406 mm (16 in.) 38cc Chainsaw CSP4518 - UT74125D - 457 mm (18 in.) 45cc Chainsaw CSP4520 - UT74127D - 508 mm (20 in.) 45cc Chainsaw Your new chainsaw has been engineered and manufactured to Homelite’s high standard for dependability, ease of operation, and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
TABLE OF CONTENTS ■ Introduction .......................................................................................................................................................................................... 2 ■ General Safety Rules ...................................................................................................................................................................... 3 - 4 ■ Specific Safety Rules ......................................................................
GENERAL SAFETY RULES WARNING: 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 combination of using common sense, staying alert, and knowing how your saw works. READ ALL INSTRUCTIONS ■ KNOW YOUR TOOL. Read the operator’s manual carefully.
GENERAL SAFETY RULES ■ KEEP ALL PARTS OF YOUR BODY away from the saw chain when the engine is running. ■ OPERATE THE CHAINSAW ONLY in well-ventilated areas. ■ ALWAYS CARRY THE CHAINSAW WITH THE ENGINE STOPPED AND THE BRAKE ENGAGED, the guide bar and saw chain to the rear, and the silencer away from your body. When transporting the chainsaw, use the appropriate guide bar scabbard. ■ DO NOT OPERATE A CHAINSAW IN A TREE unless you have been specifically trained to do so.
SPECIFIC SAFETY RULES PROPER CLOTHING FOR SAFETY PUSH AND PULL ■ Wear close-fitting clothing. Always wear heavy, long trousers, boots, and gloves. Do not wear jewellery, shorts, sandals, or go barefoot. Do not wear loose-fitting clothing, which could be drawn into the engine or catch the chain or undergrowth. Wear overalls, jeans, or leggings made of cut-resistant material or ones that contain cut-resistant inserts. Secure hair so that it is above shoulder level.
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 more safely. SYMBOL NAME Safety Alert Symbol Indicates danger, warning or caution. It means attention!!! Your safety is involved.
SYMBOLS Petrol Use unleaded petrol intended for motor vehicle use with an octane rating of 87 ([R + M] / 2) or higher. Oil Use 2-cycle oil for air cooled engines. Mix Petrol and Oil Mix the fuel mix thoroughly and also each time before refuelling. SAVE THESE INSTRUCTIONS SPECIFICATIONS Weight - No bar, chain, fuel or oil ................................................................................................................................... 4.4 kg (9.7 lbs) Fuel tank capacity ...............
FEATURES See Figure 1. (K) Throttle Lock Button (A) Front hand guard/Chain Brake (L) Chain Oil Cap (B) Front handle (M) Silencer (C) Cylinder cover (N) Carburettor Adjustment (D) Primer bulb (O) Rear handle (E) Choke Lever (P) Throttle Trigger (F) Chain (Q) Fuel Mix Cap (G) SAFE-T-TIP® (R) On/Off Switch (H) Guide Bar (S) Starter/Fan Housing (I) (T) Starter Grip Chain Catcher (J) Trigger Release OPERATION For your safety, study this entire manual before operating the saw.
OPERATION MIXING THE FUEL WARNING: KICK-BACK 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 upper portion of the tip of the guide bar may cause the chain to dig into the object and stop the chain for an instant. The result is a lightning-fast, reverse reaction which kicks the guide bar up and back towards the operator.
OPERATION NOTE: Do not use dirty, used or otherwise contaminated oils. Damage may occur to the oil pump, bar, or chain. 1. Carefully pour the bar and chain oil into the tank. CAUTION: Failure to release partial throttle when chain brake lever is in the brake position will result in serious damage to the unit. Never squeeze and hold the throttle trigger while the chain brake is in the brake position. 2. Fill the oil tank every time you fuel the engine. STARTING THE ENGINE See Figure 8.
OPERATION ■ Hold the saw firmly with both hands. Always keep your LEFT HAND on the front handle and your RIGHT HAND on the rear handle so that your body is to the left of the chain line. 2. Accelerate the engine to full throttle just before entering the cut by squeezing the throttle trigger. 3. Begin cutting with the saw against the log. 4. Keep the engine at full throttle the entire time you are cutting.
OPERATION ADJUSTING IDLING SPEED ■ Consider the distribution and weight of heavy limbs (B). See Figure 24. ■ Clear out the undergrowth around the tree to be felled (C). ■ If the engine starts, runs, and accelerates but will not idle, turn the idling speed screw “T” clockwise to increase idling speed. ■ Do not cut trees near electrical wires or buildings (D). ■ If the chain turns at idle, turn the idling speed screw “T” anticlockwise to reduce the idle RPM and stop the chain movement.
OPERATION On large diameter trees, stop the back cut before it is deep enough for the tree to either fall or settle back on the stump. Then insert soft wooden or plastic wedges (F) into the cut so they do not touch the chain. Drive wedges in, little by little, to help jack the tree over. When bucking or felling with a wedge, it may be necessary to remove the SAFE-T-TIP® anti-kick-back device to allow the bar to be drawn through the cut. After you complete the cut, reinstall the tip immediately. 5.
OPERATION CUTTING SPRING POLES WARNING: See Figure 37. A spring pole (A) is any log, branch, rooted stump, or sapling which is bent under tension by other wood so that it springs back if the wood holding it is cut or removed. On a fallen tree, a rooted stump has a high potential of springing back to the upright position during the bucking cut to separate the log from the stump. Watch out for spring-poles; they are dangerous.
MAINTENANCE 4. Keep the file level with the top plate of the tooth. Do not let the file dip or rock. See Figure 54. NOTE: New chain tends to stretch. Check the chain tension frequently and tension as required. 5. Using light but firm pressure, stroke towards the front corner of the tooth. See Figure 55. CAUTION: 6. Lift the file away from the steel on each return stroke. A chain tensioned while warm may be too tight upon cooling. Check the “cold tension” before next use. 7.
MAINTENANCE MAINTAINING DEPTH GAUGE CLEARANCE See Figures 51, 59, and 60. ■ Maintain the depth gauge (A) at a clearance of 0.6 mm (0.25 in.). Use a depth gauge tool for checking the depth gauge clearances. ■ Every time the chain is filed, check the depth gauge clearance. ■ Use a flat file (B) (not provided) and a depth gauge jointer (C) (not provided) to lower all gauges uniformly. Use a 0.6 mm (0.025 in.) depth gauge jointer.
MAINTENANCE Choose one of the following cleaning options: REPLACING THE SPARKING PLUG 9. See Figure 71. This engine uses a Champion RCJ-4 with 0.63 mm (0.025 in.) electrode gap. Use an exact replacement and replace every six months, or more frequently if necessary. To lightly clean, tap the filter against a smooth, flat surface to dislodge most saw dust and dirt particles. 10. For a more thorough cleaning, clean in warm soapy water, rinse, and let dry completely.
MAINTENANCE STORING THE CHAINSAW (1 MONTH OR LONGER) 4. Clean all foreign material from the saw. 1. Drain all fuel from tank into a container approved for petrol. 2. Run the engine until it stops. This will remove all fuel-oil mix that could become stale and leave varnish and gum in the fuel system. 3. Drain all bar and chain oil from tank into a container approved for oil. 5. Store it in a well-ventilated place that is inaccessible to children.
TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION Engine starts, runs, and accelerates but will not idle. Carburettor requires adjustment. Turn idling speed screw “T” clockwise to increase idling speed. If chain turns at idle, turn idling speed screw “T” anticlockwise to decrease speed. Wear protective equipment and observe all safety instructions. See Figure 24. Engine starts and runs, but chain is not rotating. 1. Chain oil tank empty. 1.
SAFETY DIRECTIVE EC DECLARATION OF CONFORMITY According to machinery directive 98/37/EC and EMC directive 89/336/EEC - We, Homelite Consumer Products Inc.