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2) Remove the clutch cover.
(Figure 3)

3) Slide the guide bar on the bar
bolts until the guide bar rests against
the clutch drum sprocket. (Figure 4)

4) Hold the chain with the drive links
as shown. The drive links should be
facing inward with the cutters facing
to the right, or direction of rotation.
(Figure 5)

5) Fit the drive links in the clutch
drum sprocket. (Figure 6)

Figure 6

6) Place the chain drive links into the
bar groove.

7) Pull the guide bar forward to
make sure all of the drive links are in
the bar groove.

8) Reinstall the clutch cover. (Figure
3) Make sure the adjusting pin is
aligned with the hole in the guide
bar.

CAUTION: Make sure the
adjustment pin aligns with the hole.
Failure to align the pin and install the
cover properly may result in
damage, possibly permanent, to
your saw.

ADJUSTING CHAIN TENSION

Before adjusting, make sure the bar
knobs are loosened 1 

½

 - 2 turns.

Adjusting the chain tension with the
knobs tight can cause damage.

Checking the Chain Tension

Check the chain tension by using a
screwdriver to move the chain along
the bar. If it does not rotate, it is too
tight. If it sags below the bar, it is too
loose.

Adjusting the Chain Tension

The chain stretches slightly during
each use, especially the first few
times the saw is used. Always check
the chain tension each time the saw
is used and refueled.

1) Make sure the bar knobs are
loosened 1-1/2 – 2 turns.

2) Using a screwdriver, adjust the
tension of the chain. The adjusting
pin is located right below the two bar
knobs.

3

3) Turn the screw to the right to
increase the tension and turn it to
the left to release tension.

4) Using a screwdriver, move the
chain around on the guide bar to
make sure all of the links are in the
bar groove. If the chain does not
rotate, it is too tight and the
adjuster needs to be loosened.

5) Tighten the bar knob securely
after the tension is adjusted.

FUELING AND LUBRICATION

Use regular grade unleaded
gasoline mixed with 40:1 2-cycle
engine oil. Do not use a fuel
mixture that has been stored for
more than 90 days.

The bar and chain require constant
lubrication in order to function
properly. Lubrication is provided by
the oiler system. Lack of oil will
cause damage to the bar and
chain. Smoke coming from the
chain and discoloration on the bar
are signs the oil is low.

Fueling Safety Instructions

1) Do not smoke while fueling or
operating the saw.

2) Do not allow sparks or flame in
the area where the fuel is poured or
mixed. Always allow the engine to
cool before refueling.

3) When refueling, turn the engine
off and let it fuel in a non-
combustible area. Slowly remove
the fuel cap and refuel the saw.

4) Mix and pour the fuel in a well-
ventilated outdoor area. Store the
fuel in a cool, dry place. Wipe up
fuel spills before attempting to start
the saw.

5) Start the engine at least 10 feet
from the fueling site

Figure 3

Figure 4

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Figure 5

Figure 7

Summary of Contents for 50969

Page 1: ...000 RPMs Anti Vibration Function Chain Brake Auto Chain Lubrication CAUTION FOR YOUR OWN SAFETY READ INSTRUCTION MANUAL COMPLETELY AND CAREFULLY BEFORE OPERATING THIS CHAINSAW Any failures made in following the safety regulations and and instructions may result in an electric shock fire and or serious injury NOTE Remove the 14 Bar and Bar Cover from the bottom of the case by unscrewing the anchor ...

Page 2: ... sharp along with properly maintaining the chainsaw Failure to do so can increase the chance of kickback occurring Begin and continue the cut with the engine running at full speed Use caution while re entering a previous cut Do not attempt a plunge cut starting a cut with the tip of the blade Maintaining Control of the Chainsaw Stand to the left of the saw Keep your elbow locked and a firm grip on...

Page 3: ...the bar knobs are loosened 1 1 2 2 turns 2 Using a screwdriver adjust the tension of the chain The adjusting pin is located right below the two bar knobs 3 3 Turn the screw to the right to increase the tension and turn it to the left to release tension 4 Using a screwdriver move the chain around on the guide bar to make sure all of the links are in the bar groove If the chain does not rotate it is...

Page 4: ...tarts 6 Allow the engine to run for approximately 30 seconds before squeezing and releasing the throttle trigger which will allow the engine to return to idle speed Starting a Warm Engine 1 Place the ON OFF switch into the ON position 2 Push the choke lever full in 3 Pull on the starter rope quickly with your right hand until the engine starts 4 After the engine starts squeeze and release the thro...

Page 5: ... 1 3 of the diameter of the tree Complete the notch by cutting the bottom of the notch Remove the notch of wood from the tree once the notch is cut 2 After removing the wood make the felling cut on the opposite side of the notch Make a cut about two inches higher than the center of the notch This will leave a hinge between the felling cut and the notch The hinge will help prevent the tree from fal...

Page 6: ...nches from the work area in order to avoid tripping over them Limbing Limbing should only be done when a tree is already cut down Leave any large limbs under the tree for support as you work Start at the base of the tree and work towards the top Small limbs can be removed in one cut Keep the tree between you and the chain Cut opposite from the branch being cut Remove any larger supportive branches...

Page 7: ...ark plug with a copper wire brush The electrode gap should be 0 6mm 7 Reconnect the ignition cable 8 Replace the air filter 9 Replace the top cover make sure the cover is securely fitted and then screw down the fastener Carburetor The carburetor has already been properly adjusted at the factory If it requires additional adjustment take the saw to an authorized service dealer Chain Bar Maintenance ...

Page 8: ...eds to be increased or not Chain Maintenance Sharpening Chain sharpening requires special tools to ensure that the cutters are sharpened to the proper angle and depth We recommend you allow a professional chain sharpener to sharpen your chain Breaking in a new chain A new chain and bar will need adjusting after as few as 5 cuts This is normal during the break in period and the interval between fut...

Page 9: ...ter is dirty Engine will not accelerate lacks power or dies under a load Contact an authorized service dealer Crankshaft seal is worn Contact an authorized service dealer Carburetor requires adjustment Engine will not idle properly Check for dirty fuel filter replace if necessary Check for faulty fuel line repair or replace if necessary Fuel is not reaching carburetor Install new spark plug Spark ...

Page 10: ...use abuse negligence or accidents repairs or alterations or a lack of maintenance NATI shall in no event be liable for death injuries to persons or property or for incidental special or consequential damages arising from the use of our products To receive service under warranty the original manufacturer part must be returned for examination by an authorized service center Shipping and handling cha...

Page 11: ...odel B Saw Chain qty 2 size varies by model C Chain Tensioning Screw D Stop Claw E Chain Brake Lever Front Hand Guard F Front Handle G Starter Handle H Spark Plug under air filter cover I Air Filter Cover Screw Driver W Chain File U Plug Wrench V Chain Catch T Part Description M Fan Housing N Fuel Tank Cap O Rear Handle Bootstrap P Bar Cover Q Choke Carburetor Setting R Bar Fastening Nut S Throttl...

Page 12: ...8808902 06 13 12 For customer service call 1 800 348 5004 or e mail feedback natitools com Parts List ...

Page 13: ...8808902 06 13 13 For Customer Service please call 1 800 348 5004 or email feedback natitools com Parts List ...

Page 14: ...ke Knob Retainer 38969 1 20 Piston Pin 38561 2 63 Anti Shock Block 38970 1 21 Needle Bearing Ring 38562 2 64 Oil Seal 38974 1 22 Needle Bearing 38563 1 65 Oil Pump Cover Plate 38975 1 23 Crankshaft Components 38669 1 66 Screw 38976 4 24 Semicircular Key 38748 1 67 Worm Gear 38994 1 25 Flameout Wire 38812 1 68 Needle Bearing 39001 1 26 Igniter 38881 1 69 Sprocket Wheel 39068 1 27 Oil Cap Retainer 3...

Page 15: ...w ST4 8X16 39336 4 145 Screw 44096 5 105 Front Handle Assembly 39337 1 146 Shock Rubber Washer 39368 1 170 Recoil Assembly 39367 1 147 Shield Ring 39368 1 106 Kick Spring Base 39367 1 148 Washer 39368 1 107 Kick Spring 39367 2 149 Brake Torsion Rod Spring 39368 1 108 Starter Cover 39367 1 150 Front Guard Tube 39368 1 109 Start Rope 39367 1 151 Tightener Cover 39344 1 110 L H Sheathing 39367 1 152 ...

Page 16: ...d OWNER S MANUAL For warranty purposes NATI recommends that you retain all receipts covering maintenance on your engine However NATI cannot deny warranty solely because of the lack of receipts or for your failure to ensure the completion of scheduled maintenance As the small off road engine purchaser owner you should however be aware that NATI may deny any and or all warranty coverage or responsib...

Page 17: ...ser owner of the new engine or equipment and to each subsequent purchaser owner that each of its engines is a Designed built and equipped so as to conform with all applicable regulations adopted by the EPA pursuant to their respective authority and b Free from defects in materials and workmanship which at any time during the ECS Warranty Period may cause a warranted emissions related part to fail ...

Page 18: ...ble for diagnostic costs if the repair is deemed warrantable 6 NATI shall be liable for damages to other original engine components or approved modifications proximately caused by a failure under warranty of any emission related part covered by the ECS warranty 7 Throughout the ECS Warranty Period NATI shall maintain a supply of warranted emission related parts sufficient to meet the expected dema...

Page 19: ... Clamps 2 Air Induction System including a Intake Pipe Manifold b Air Cleaner 3 Ignition System including a Spark Plug b Ignition Module Coil 4 Catalytic Muffler Assembly if so equipped a Muffler Gasket b Exhaust Manifold 5 Crankcase Breather Assembly including a Breather Connection Tube 6 Fuel tank evaporative emissions control system include a Fuel Tank b Fuel Cap c Fuel Hose d Clamps 7 Miscella...

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