Northern Industrial Tools 999000 Owner'S Manual Download Page 13

Hold the front handle with left hand and firmly press the cutoff saw against ground, place the 
right foot on the carburetor box cover. 
Holding the starter grip (5) securely, slowly pull out the starter rope for a short distance, and then 
pull it through quickly and strongly. 
Note: Starter rope is 3 3/4-ft. long; do not pull the rope out more than its length otherwise it may 
break or cause damage to the starting system. 

• Do not let go of the starter grip. 
• After pulling, guide the rope back into place slowly. 

• Pull the rope only straight up and down through the rope guide bushing to prevent it 

from wearing. 

 After the rope has been pulled through: 

• If the engine does not start, press the button of the decompression valve again and 
restart the engine. 
• If the engine runs for a while but doesn’t keep running, press the decompression valve 
in, move the choke lever to 

 

and then restart the engine. 

As soon as the engine is running, briefly blip the throttle trigger (3) at once. The full throttle lock 
button (4) reverts to its original position and the engine idles. 
If the engine is new, or has been stored for a long period of time, pull the starter rope through 
several times to ensure that sufficient fuel is delivered into the fuel line and combustion chamber 
of the engine. 
 

3. Operation: 

The blade will not run when the engine idles. 
When the cutoff saw is ready for actual cutting work, gently pull the throttle trigger (3) backward 
to accelerate the engine, when the speed is over 3800 RPM, the blade begins to rotate and speeds 
up. When the blade speed is up and stable, you can begin to move the saw slowly toward the 
object to be cut. After the cutting edge comes in contact with the object, increase pressure to the 
saw slowly until the blade is at the desired depth. Finally hold the machine securely and move 
along a straight line to complete the cut. 
To stop or halt the cut (when a cut is completed, or the engine runs out of fuel halfway, or 
abnormal sound is heard), first lift the blade out of the cut, then release the throttle trigger, wait 
until the engine slows down to idle speed and the blade stops running, then finally turn off the 
machine. 
 

4. Emergency stopping (Ref. Fig.8): 

Under normal conditions, the machine is to be turned off when 
the engine idles. However, if a malfunction or emergency 
occurs during cutting, you can stop the engine immediately by 
pressing and holding the Kill Switch (2) on the front end of the 
rear handle (1). But note that the service life of some 
components of the saw may be adversely affected if the engine 
is stopped too often during cutting. 
 

Fig. 8 

5. Notes on operation 

Follow all applicable instructions in this manual when operating the cutoff saw. 
During the break-in phase, which takes about 8 hours, the saw must not be operated at high 
speeds without load (do not pull the throttle trigger beyond 3/4 of full throttle). Following this 
procedure will lengthen the service life of your machine. 

 

12

 

Summary of Contents for 999000

Page 1: ...Item 999000 OWNER S MANUAL Read carefully and understand RULES FOR SAFE OPERATION and instructions before operating Failure to follow the safety rules and other basic safety precautions may result in...

Page 2: ...formance and satisfaction from your cutoff saw it is important that you read and understand the maintenance and safety manual before operating the saw Northern Tool Equipment strongly recommends that...

Page 3: ...r 13 3 Adjusting blade guard 13 Maintenance repair of cutoff saw 13 15 1 Cleaning and maintenance of air filter 13 14 2 Maintenance of spark plug 14 3 Replacing starter rope 14 15 4 Replacing pawl 15...

Page 4: ...tton 9 Throttle Trigger 10 Rear Handle 11 Filter Cover Lock Lever 12 Air Filter 13 Choke Lever 14 Starter Grip 15 Fuel Tank Cap 16 Decompression Valve 17 Water Attachment 18 Tensioning Nut 19 Muffler...

Page 5: ...Lock lever Locks the air filter cover Pull back on the lever to open the filter cover 12 Air Filter Filters dirt and debris from entering carburetor 13 Choke Lever Turning this lever counter clockwis...

Page 6: ...Blade Before installing a blade make sure that the maximum operating speed of the blade is above or equal to the spindle speed of your cutoff saw Inspect the cutting blade frequently and replace imme...

Page 7: ...Operation Manual Employers should establish a training program for operators of this saw to ensure safe operation of this powerful tool Avoid loose fitting jackets scarves neckties jewelry flared or...

Page 8: ...ed during cutting can be directed away from the operator Ref Fig 2 6 Check to make sure the V belt is properly tensioned 7 Make sure the saw is free of oil spillage 8 Make sure the main cover and the...

Page 9: ...e cut as this may cause the blade to become pinched 7 Precautions on fueling 1 Fuel the machine only in a well ventilated environment 2 Before refueling let the engine cool off naturally Do not take a...

Page 10: ...troke engine oil Fuel mix Mix ratio 75 1 Fuel tank capacity 0 4 gallons 1 5L Ignition type Electronically controlled breakerless magneto ignition Electrode gap of spark plug 0 02 Spark plug thread M14...

Page 11: ...er can be 12 or 14 Choose an appropriate size and type of blade which best suits the cutting work Keep in mind the blade size needs to be fitted with the blade guard The diameter of the arbor hole for...

Page 12: ...saw on the ground and make sure it s well balanced see to it that the saw blade does not touch any objects or the ground and that there is no person within the swivel range of the saw Fig 6 Fig 7 Pres...

Page 13: ...al cutting work gently pull the throttle trigger 3 backward to accelerate the engine when the speed is over 3800 RPM the blade begins to rotate and speeds up When the blade speed is up and stable you...

Page 14: ...dle speed after Standard setting adjustment above To adjust idle speed start the engine first If the idle speed is too low the engine may shut off after starting In this case make the standard setting...

Page 15: ...y 5 Replace spark plug after approx 100 operating hours or earlier if the electrodes are badly eroded A BPMR7R type spark plug is recommended for replacement 6 Refit the plug boot and make sure it is...

Page 16: ...up on the rope rotor 13 Refit the flywheel starter cover 1 and screw in the four screws 2 4 Replacing pawl Ref Fig 13 The pawl functions as a link between the rope rotor and the c by engaging and dis...

Page 17: ...nction If damaged As required Visual inspection Complete Machine Clean Throttle trigger Kill Switch Functional test Check Filter in fuel tank Replace Fuel tank Clean Clean V belt Replace Clean Air fil...

Page 18: ...ort and storage 1 Avoid knocks and bumps 2 Abrasive blades must not be exposed to direct sunlight or other sources of heat during transport and storage Store the machine in a place free of moisture an...

Page 19: ...sher 5 3 6 1E49F05000 Coil 1 7 B1FUD1 Oil seal 17 28 7 1 8 1E49F01001 Crankshaft housing Left 1 9 GB T276 94 Ball bearing 6203 1 10 1E49F01003 Gasket 1 11 1E49F01004 Positioning Sleeve 2 12 1E49F01002...

Page 20: ...3 6 1E49F03005 Spring Cover 1 21 1E49F02007 0 Retainer 3 7 1E49F03004A Rope rotor 1 22 1E49F02007 06 Clutch 1 8 1E49F03009A Pawl 1 23 1E49F02007 04 Tension spring 3 9 1E49F03008 Spring clip 1 24 1E49...

Page 21: ...1 3 1E49F04004 Cylinder cover 1 4 1E49F07016 Screw M5 16 3 5 1E49F01011 Screw M5 20 4 6 1E49F04002 03 Washer 1 7 1E49F04002A Decompression valve 1 8 1E49F04005 Exhaust gasket 1 9 1E49F08000A Muffler...

Page 22: ...F07006 Oil Tank Cap 1 5 1E49FA06005 Choke lever 1 17 1E49F07015 Washer 1 6 1E49F06003 Air hose 1 18 1E49F07014 Tank vent 1 7 1E49F06001 Carburetor 1 19 1E49FA07003 Gasket 1 8 1E49F07020 Screw M5 65 2...

Page 23: ...ug cover 1 5 1E49FA5001 Kill switch 1 6 GB T845 85 Screw ST2 9 13 2 7 1E49FA09010 Handle molding 1 8 1E49F09010 03 Torsion spring 1 9 1E49F09010 02 Full throttle lock button 1 10 1E49FA09003 Throttle...

Page 24: ...1 5 1E49F10006 Paper Air Filter 1 6 1E49F10007A Secondary filter 1 7 GB T845 85 Screw ST2 9 19 2 8 1E49FA10003 Half round 1 9 1E49FA10002 Filter base 1 10 1E49F06007 Gasket 1 11 1E49F07016 Screw M5 16...

Page 25: ...bber ring 1 21 EHS400 01004A Support 1 7 EHS400 01006A Blade Guard 400mm 1 22 EHS400 01021A Ring 1 8 EHS400 01007A Handle 1 23 GB T276 94 Ball bearing 6202 2 9 EHS400 01026 Screw M6 16 2 24 EHS400 010...

Page 26: ...g 3 15 1E49F070 18 screw M5 25 2 5 1E49F01011 Screw M5 20 5 16 GB894 1 86 Spring lock 8 2 6 EHS400 02005A Clamping lever 1 17 1E49F070 21 Screw M5 24 2 7 EHS400 02006A Cover 1 18 EHS400 03001A Handle...

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