RedMax G621AVS - Manual

 6  4. For safe operation 16. O p e r a t e t h e c h a i n s a w o n l y i n w e l l ventilated areas. Never start or run theengine inside a closed room or building.E x h a u s t f u m e s c o n t a i n d a n g e r o u scarbon monoxide. 17. Do not operate a chain saw in a tree unless specially tr...

The saw chain has very sharp edges. Use thickprotective gloves for safety. 1. Loosen the nuts and remove the chain cover. (F1) 2. Install the attached spike to the power unit. 3. Fit the saw chain around the guide bar and, while gearing the chain to the sprocket, mountthe guide bar to the power unit...

 8  6. Fuel and Chain oil ■ RECOMMENDED MIXING RATIOGASOLINE 50:OIL 1 • Exhaust emission are controlled by the fundamental engine parameters andcomponents(eq., carburation, ignitiont i m i n g a n d p o r t t i m i n g ) w i t h o u taddition of any major hardware or theintroduction of an inert ma...

6. Fuel and Chain oil  9  ■ CHAIN OIL Use motor oil SAE 10W-30 all year round, orSAE 30-40 in summer and SAE 20 in winter. Do not use waste or regenerated oil that cancause damage to the oil pump. NOTE again for at least one minute. As someoils may be difficult to agitate dependingon oil ingredien...

 10  It is very dangerous to run a chainsaw thatmounts broken parts or lacks any parts.Before starting engine, make sure that all thep a r t s i n c l u d i n g b a r a n d c h a i n a r e i n s t a l l e dproperly. ■ STARTING ENGINE 1. Fill fuel and chain oil tanks respectively, and tighten the c...

7. Operation ■ CHECKING OIL SUPPLY Make sure to set up the bar and the chain whenchecking the oil supply.If not, the rotating parts may be exposed. It isvery dangerous. After starting the engine, run the chain at mediumspeed and see if chain oil is scattered off as shownin the figure. (F11) (1) Chai...

 12  so that saw chain does not turn. If idling speed istoo slow, turn the screw clockwise. 4. Make a test cut adjust the H needle for best cutting power, not for maximum speed. (1) L needle (2) H needle (3) Idle adjusting screw ■ ICING PREVENTION SYSTEM This system prevents icing of the carbureto...

7. Operation ■ CHAIN BRAKE This machine is equipped with an automatic braketo stop saw chain rotation upon occurrence ofkickback while in saw cutting operation. The brakeis automatically operated by inertial force whichacts on the weight fitted inside the front guard.This brake can also be operated ...

 14  • Before proceeding to your job, read "For Safe Operation" section It is recommendedto first practice sawing easy logs. This alsohelps you get accustomed to your unit. • Always follow the safety regulations. The c h a i n s a w m u s t o n l y b e u s e d f o r c u t t i n gwood. It i...

 16  A Log lying on the ground (F22) Saw down halfway, then roll the log over and cutfrom the opposite side. A Log hanging off the ground (F23) In area A, saw up from the bottom one-third andfinish by sawing down from the top. In area B, sawdown from the top one-third and finish by sawingup from t...

9. Maintenance M a i n t e n a n c e , r e p l a c e m e n t , o r r e p a i r o f t h eemission control device and systems may bep e r f o r m e d b y a n y n o n - r o a d e n g i n e r e p a i restablishment or individual. Before cleaning, inspecting or repairing yourunit, make sure that engine h...

 18  9. Maintenance ■ PERIODICAL SERVICE POINTS 1. Cylinder fins Dust clogging between the cylinder fins will causeoverheating of the engine. Periodically check andc l e a n t h e c y l i n d e r f i n s a f t e r r e m o v i n g t h e a i rcleaner and the cylinder cover. When installing thecylind...

4. Spark plug (F32) Clean the electrodes with a wire brush and resetthe gap to 0.65 mm as necessary. Champion: CJ-7Y or NGK: BPM7A 5. Sprocket (F33) Check for cracks and for excesslve wear interfenngw i t h t h e c h a i n d r i v e . I f t h e w e a r i n g i s f o u n dobviously, replace it with n...

 20  ■ SAW CHAIN I t is very important for smooth and safe operation to keep the cutters always sharp. Your cutters need to be sharpened when: • Sawdust becomes powder-like. • You need extra force to saw in. • The cut way does not go straight. • Vibration increases. • Fuel consumption increases. C...

10. Maintenance of Saw Chain and Guide Bar ■ GUIDE BAR • Reverse the bar occasionally to prevent partial wear. • The bar rail should always be a square. Check for wear of the bar rail. Apply a ruler to the barand the outside of a cutter. If a gap is observedbetween them, the rail is normal. Otherwis...

12. Troubleshooting Guide Case 1. Starting failure: Make sure the icing prevention system is not working. Case 2. Lack of power/Poor acceleration/Rough idling Case 3. Oil does not come out Check fuel for water or substandard mixture. Check for engine flooding. Check the spark. Check fuel for water o...

 23  13. Parts list NOTE : 1. Use KOMATSU ZENOAH genuine parts as specified in the parts list for repair and/or replacement. 2. KOMATSU ZENOAH does not warrant the machines, which have been damaged by the use of any parts other than those specified by the company. 3. When placing parts orders for ...

 29  Q'TY Key# PART NUMBER DESCRIPTION NOTE /UNIT K2 3350-06020 Gasket kit 1 OP K3 3350-06030 Diaphragm kit 1 OP K8 2623-06012 Double spike kit 1 OP Q'TY Key# PART NUMBER DESCRIPTION NOTE /UNIT 1 2890-96100 Puller assy 1 OP 2 2616-96210 Wrench 1 OP 3 3350-96220 Stopper 1 OP 4 3350-96240 Gauge 1 OP...