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4.

Never operate with a missing or damaged discharge 
chute. Keep all safety devices in place and working.

5.

Never run an engine indoors or in a poorly ventilated 
area. Engine exhaust contains carbon monoxide, an 
odorless and deadly gas. 

6.

Do not operate machine while under the influence of  
alcohol or drugs.  

7.

Muffler and engine become hot and can cause a burn. Do 
not touch.

8.

Exercise extreme caution when operating on or crossing 
gravel surfaces. Stay alert for hidden hazards or traffic.

9.

Exercise caution when changing direction and while 
operating on slopes. 

10. Plan your snow throwing pattern to avoid discharge 

towards windows, walls, cars etc. To avoid property 
damage or personal injury caused by a ricochet. 

11. Never direct discharge at children, bystanders and pets 

or allow anyone in front of the machine. 

12. Do not overload machine capacity by attempting to clear 

snow at too fast of a rate.

13. Never operate this machine without good visibility or 

light. Always be sure of your footing and keep a firm hold 
on the handles. Walk, never run.

14. Disengage power to the auger/impeller when 

transporting or not in use.

15. Never operate machine at high transport speeds on 

slippery surfaces. Look down and behind and use care 
when in reverse.  

16. If the machine should start to vibrate abnormally, stop the 

engine, disconnect the spark plug and ground it against 
the engine. Inspect thoroughly for damage. Repair any 
damage before starting and operating.

17. Disengage the control bail and stop engine before you 

leave the operating position (behind the handles). Wait 
until the auger/impeller comes to a complete stop before 
unclogging the discharge chute, making any 
adjustments, or inspections. 

18. Never put your hand in the discharge or collector 

openings. Always use a clearing tool to unclog the 
discharge opening. 

19. Use only attachments and accessories approved by the 

manufacturer (e.g. wheel weights, tire chains, cabs etc.).

20. If situations occur which are not covered in this manual, 

use care and good judgment. Contact your dealer or 
telephone 1-866-840-6483 for assistance and the name 
of your nearest servicing dealer.

Maintenance & Storage

1.

Never tamper with safety devices. Check their proper 
operation regularly.

2.

Disengage the control bail and stop engine. Wait until the 
auger/impeller come to a complete stop. Disconnect the 
spark plug wire and ground against the engine to prevent 
unintended starting before cleaning, repairing, or 
inspecting. 

3.

Check bolts, and screws for proper tightness at frequent 
intervals to keep the machine in safe working condition. 
Also, visually inspect machine for any damage. 

4.

Do not change the engine governor setting or over-speed 
the engine. The governor controls the maximum safe 
operating speed of the engine.

5.

Snow thrower shave plates and skid shoes are subject to 
wear and damage. For your safety protection, frequently 
check all components and replace with original 
equipment manufacturer’s (O.E.M.) parts only.  “Use of 
parts which do not meet the original equipment 
specifications may lead to improper performance and 
compromise safety!”

6.

Check the control bail periodically to verify they engage 
and disengage properly and adjust, if necessary. Refer to 
the adjustment section in this operator’s manual for 
instructions.

7.

Maintain or replace safety and instruction labels, as 
necessary.

8.

Observe proper disposal laws and regulations for gas, 
oil, etc. to protect the environment.

9.

Prior to storing, run machine a few minutes to clear snow 
from machine and prevent freeze up of auger/impeller.

10. Never store the machine or fuel container inside where 

there is an open flame, spark or pilot light such as a water 
heater, furnace ,clothes dryer etc.

11. Always refer to the operator’s manual for proper 

instructions on off-season storage. 

Your Responsibility:

 

Restrict the use of this power machine to persons 
who read, understand and follow the warnings and 
instructions in this manual and on the machine.

Summary of Contents for 721

Page 1: ...or grass covered land unless the engine s exhaust system is equipped with a spark arrester meeting applicable local or state laws if any If a spark arrester is used it should be maintained in effective working order by the operator In the State of California the above is required by law Section 4442 of the California Public Resources Code Other states may have similar laws Federal laws apply on fe...

Page 2: ...ence please copy the model number and the serial number of the equipment in the space below ENGINE INFORMATION The engine manufacturer is responsible for all engine related issues with regards to performance power rating specifications warranty and service Please refer to the engine manufacturer s Owner s Operator s Manual packed separately with your unit for more information CALLING CUSTOMER SUPP...

Page 3: ...llector housing height to clear gravel or crushed rock surfaces 6 Disengage the control bail before starting the engine 7 Never attempt to make any adjustments while engine is running except where specifically recommended in the operator s manual 8 Let engine and machine adjust to outdoor temperature before starting to clear snow 9 To avoid personal injury or property damage use extreme care in ha...

Page 4: ...e manufacturer e g wheel weights tire chains cabs etc 20 If situations occur which are not covered in this manual use care and good judgment Contact your dealer or telephone 1 866 840 6483 for assistance and the name of your nearest servicing dealer Maintenance Storage 1 Never tamper with safety devices Check their proper operation regularly 2 Disengage the control bail and stop engine Wait until ...

Page 5: ...nto the operating position Make sure not to pinch or crimp the cable Tighten the hand knobs Assembling the Discharge Chute For shipping reasons the snow thrower has been packaged with the upper chute pivoted all the way down To pivot it upward proceed as follows Turn the chute until the chute opening is facing straight ahead Remove the wing knob flat washer and carriage bolt from the lower chute S...

Page 6: ... position as desired Fuel Plug Discard the fuel plug before filling the fuel tank It is only used during assembly to keep dirt and debris out of fuel tank Primer Button Used to inject fuel directly into the carburetor to insure fast starts in cold weather Follow engine manual to prime engine Ignition Key Used to start engine Put key in ON position to start for both electric and recoil start engine...

Page 7: ...ve choke gradually to OFF If engine falters move choke immediately to FULL and then gradually to OFF When disconnecting the power cord always unplug from the three prong receptacle first and then from the snow thrower Recoil Starter Move choke lever to FULL choke position cold engine start If engine is warm place choke in OFF position instead of FULL Push primer button two or three times for cold ...

Page 8: ...he upper chute upward or downward to the desired pitch Retighten the wing knob before operating the snow thrower Position the discharge chute opening by using the Chute Handle to throw the snow in the desired direction See Figure 5 Figure 5 Operating Tips Discharge snow downwind whenever possible Slightly overlap each previously cleared path Lifting up on the handle will allow the rubber on the au...

Page 9: ...AINTAINING YOUR SNOW THROWER Replacing Belt Remove the belt cover by removing five hex screws See Figure 8 Figure 8 Pull up on the idler pulley and slip the belt off the engine pulley See Figure 9 Figure 9 Reassemble new belt Reinstall the belt cover Replacing Shave Plate The shave plate is attached to the bottom of the auger housing and is subject to wear It should be checked periodically There a...

Page 10: ...483 for information regarding the price and availability of Auger Kit 753 04472 or contact an authorized Troy bilt Service Dealer in your area To change the rubber paddles proceed as follows Remove the existing rubber paddles by unthreading the self tapping screws which secure them to the auger Secure the replacement rubber paddles to the auger using the hardware removed earlier SECTION 7 OFF SEAS...

Page 11: ...th fresh clean gasoline 3 Refer to engine manual for remedy 4 Refer to engine manual for remedy Engine overheats 1 Carburetor out of adjustment 1 Refer to engine manual for instruction Loss of power 1 Spark plug wire loose 2 Vent in gas cap plugged 1 Connect and tighten spark plug wire 2 Clear vent Excessive vibration 1 Loose parts or damaged auger 1 Stop engine immediately and disconnect spark pl...

Page 12: ...ODELS 521 721 41 39 44 35 35 44 35 44 33 43 42 18 3 14 21 8 20 10 28 22 4 1 13 11 21 2 16 7 29 12 17 25 22 28 19 15 30 6 9 9 13 31 23 27 CABLE TO BE ABOVE WHEEL AXEL 32 38 45 40 12 12 17 17 46 37 36 24 49 26 52 50 48 47 51 34 3 53 14 ...

Page 13: ...er 510 ID x 1 00 OD x 125 20 736 0329 Lock Washer 1 4 21 736 3090 Flat Washer 260 x 720 x 060 22 741 0600 Ball Bearing 17 x 40 x 12 23 741 0919 Ball Bearing 24 746 04091 Control Cable 25 748 0234 Shoulder Spacer 25 THK 26 749 04114 Lower Handle 27 750 04230 Flange Spacer 28 784 5174 Bearing Cup 29 790 00039 Idler Bracket w Brake 30 790 00045 Belt Cover 31 790 00062 Belt Keeper 32 684 0178 Mitten G...

Page 14: ...6 18 4 720 0284 Handle Knob Assembly 5 16 18 5 731 04127 Lower Chute 5 Dia 6 731 04353 Ring Lower Chute 7 731 04373 Chute Adapter 5 Dia 8 731 04388 Handle Chute 5 Dia 9 731 04429 Upper Chute w Export Label 10 732 04111 Chute Adjustment Spring 11 736 0159 Flat Washer 349 ID x 879 OD x 063 12 684 04049 Lower Chute Ass y Incl 5 7 and 10 6 4 11 9 1 10 2 5 11 8 3 7 12 ...

Page 15: ...p Hose 10 726 0470 Cable Tie 12 731 2825 Knob Choke 13 736 0119 Washer Lock 5 16 14 736 0242 Bell Washer 340 x 872 x 060 15 736 0337 Flat Washer 5 8 ID x 1 0 OD 16 747 04169 Support Wire Gas Tank 17 751 0535 Hose Fuel Line 18 751 0603 Cap Fuel 19 751 10023 Tank Fuel 20 751 0101A V Belt 1 2 x 35 0 LG 21 756 04060 Pulley Half 625 ID x 2 25 OD 22 756 0475 Pulley 1 2 V 1 2 20 LH x 6 0 23 790 00047 Bra...

Page 16: ...tems such as lubricants filters blade sharpening tune ups brake adjustments clutch adjustments deck adjustments and normal deterioration of the exterior finish due to use or exposure d Troy Bilt does not extend any warranty for products sold or exported outside of the United States its possessions and territories except those sold through Troy Bilt s authorized channels of export distribution e Re...

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