Husqvarna 120 Operator's Manual

Also see for 120: Operator's manual Operator's manual Operator's manual Workshop manual

Contents

To assemble the starter housing on theproduct1. Pull out the starter rope and put the starter inposition against the crankcase.2. Slowly release the starter rope until the pulleyengages with the pawls.3. Tighten the screws that hold the starter. (Fig. 94)To clean the air filterClean the air filter regularly from dirt and dust. Thisprevents carburetor malfunctions, starting problems,loss of engine power, wear to engine parts and morefuel consumption than usual.1. Remove the cylinder cover and the air filter.2. Use a brush or shake the air filter clean. Usedetergent and water to clean it fully.Note: An air filter that is used for a long time can notbe fully cleaned. Replace the air filter regularly andalways replace a defective air filter.3. Attach the air filter and make sure that the air filterseals tightly against the filter holder. (Fig. 95)Note: Because of different work conditions, weather orseason, your product can be used with different types ofair filter. Speak to your servicing dealer for moreinformation.To do a check of the spark plugCAUTION: Use the recommended sparkplug. Refer toTechnical data on page 26.An incorrect spark plug can cause damageto the product.1. If the product is not easy to start or to operate or ifthe product operates incorrectly at idle speed,examine the spark plug for unwanted materials. Todecrease the risk of unwanted material on the sparkplug electrodes, do these steps:a) make sure that the idle speed is correctlyadjusted.b) make sure that the fuel mixture is correct.c) make sure that the air filter is clean.2. Clean the spark plug if it is dirty.3. Make sure that the electrode gap is correct. Refer to,Technical data on page 26. (Fig. 96)4. Replace the spark plug monthly or more frequently ifnecessary.To sharpen the saw chainInformation about the guide bar and saw chainWARNING: Use protective gloves when youuse or do maintenance on the saw chain. Asaw chain that does not move can alsocause injuries.Replace a worn or damaged guide bar or saw chain withthe guide bar and saw chain combination recommendedby Husqvarna. This is necessary to keep the safetyfunctions of the product. Refer toAccessories on page27, for a list of replacement bar and chaincombinations that we recommend.• Guide bar length, in/cm. Information about the guidebar length can usually be found on the rear end ofthe guide bar.(Fig. 97)• Number of teeth on bar tip sprocket (T).(Fig. 98)• Chain pitch, in. The distance between the drive linksof the saw chain must align with the distance of theteeth on the bar tip sprocket and drive sprocket.(Fig. 99)• Number of drive links. The number of drive links isdecided by the type of guide bar.(Fig. 100)• Bar groove width, in/mm. The groove width in guidebar must be the same as the chain drive links width.(Fig. 101)• Chain oil hole and hole for chain tensioner. Theguide bar must align with product.(Fig. 102)• Drive link width, mm/in.(Fig. 103)General information about how to sharpen thecuttersDo not use a blunt saw chain. If the saw chain is blunt,you must apply more pressure to push the guide barthrough the wood. If the saw chain is very blunt, therewill be no wood chips but sawdust.A sharp saw chain eats through the wood and the woodchips becomes long and thick.The cutting tooth (A) and the depth gauge (B) togethermakes the cutting part of the saw chain, the cutter. Thedifference in height between the two gives the cuttingdepth (depth gauge setting).(Fig. 104)When you sharpen the cutter, think about the following:• Filing angle.(Fig. 105)22 1063 - 002 - 06.03.2019