background image

3

SECTION 1:  IMPORTANT SAFE OPERATION PRACTICES

DANGER: 

This machine was built to be operated according to the rules for safe operation in this manual. As with any type 

of power equipment, carelessness or error on the part of the operator can result in serious injury. This machine is capable 
of amputating hands and feet and throwing objects. Failure to observe the following safety instructions could result in 
serious injury or death.

Training

1.

Read, understand, and follow all instructions on the 
machine and in the manual(s) before attempting to 
assemble and operate. Keep this manual in a safe place 
for future and regular reference and for ordering 
replacement parts. 

2.

Be familiar with all controls and their proper operation. 
Know how to stop the machine and disengage them 
quickly.

3.

Never allow children under 14 years old to operate this 
machine. Children 14 years old and over should read and 
understand the operation instructions and safety rules in 
this manual and should be trained and supervised by a 
parent. 

4.

Never allow adults to operate this machine without 
proper instruction. 

5.

Thrown objects can cause serious personal injury. Plan 
your snow throwing pattern to avoid discharge of material 
toward roads, bystanders and the like. 

6.

Keep bystanders, helpers, pets and children at least 75 
feet from the machine while it is in operation. Stop 
machine if anyone enters the area.

7.

Exercise caution to avoid slipping or falling, especially 
when operating in reverse.

Preparation

1.

Thoroughly inspect the area where the equipment is to 
be used. Remove all door mats, newspapers, sleds, 
boards, wires and other objects which could be tripped 
over or thrown by the auger/impeller.  

2.

Always wear safety glasses or eye shields during 
operation and while performing an adjustment or repair to 
protect your eyes. Thrown objects which ricochet can 
cause serious injury to the eyes.

3.

Do not operate without wearing adequate winter outer 
garments. Do not wear jewelry, long scarves or other 
loose clothing which could become entangled in moving 
parts. Wear footwear which will improve footing on 
slippery surfaces. 

4.

Use a grounded three wire extension cord and receptacle 
for all units with electric start engines. 

5.

Adjust collector housing height to clear gravel or crushed 
rock surfaces. 

6.

Disengage all clutch levers 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 handling gasoline. Gasoline is extremely 
flammable and the vapors are explosive. Serious 
personal injury can occur when gasoline is spilled on 
yourself or your clothes which can ignite. Wash your skin 
and change clothes immediately.

a.

Use only an approved gasoline container.

b.

Extinguish all cigarettes, cigars, pipes and other 
sources of ignition.

c.

Never fuel machine indoors. 

d.

Never remove gas cap or add fuel while the 
engine is hot or running.  

e.

Allow engine to cool at least two minutes before 
refueling.

f.

Never over fill fuel tank. Fill tank to no more than 
½ inch below bottom of filler neck to provide space 
for fuel expansion.

g.

Replace gasoline cap and tighten securely.

h.

If gasoline is spilled, wipe it off the engine and 
equipment. Move machine to another area. Wait 5 
minutes before starting the engine.

i.

Never store the machine or fuel container inside 
where there is an open flame, spark or pilot light 
(e.g. furnace, water heater, space heater, clothes 
dryer etc.).  

j.

Allow machine to cool at least 5 minutes before 
storing.

Operation

 

1.

Do not put hands or feet near rotating parts, in the auger/
impeller housing or discharge chute. Contact with 
rotating parts can amputate hands and feet. 

2.

The auger/impeller clutch lever is a safety device. Never 
bypass its operation. Doing so, makes the machine 
unsafe and may cause personal injury. 

3.

The clutch levers must operate easily in both directions 
and automatically return to the disengaged position when 
released. 

WARNING: 

This symbol points out important safety instructions which, if not followed, could endanger 

the personal safety and/or property of yourself and others. Read and follow all instructions in this manual 
before attempting to operate this machine. Failure to comply with these instructions may result in personal 
injury. When you see this symbol—

heed its warning

.

WARNING: 

Engine Exhaust, some of its constituents, and certain vehicle components contain or emit 

chemicals known to State of California to cause cancer and birth defects or other reproductive harm.

Summary of Contents for Snow Boss 721

Page 1: ...ster 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 la...

Page 2: ...te is explained below For future reference 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 engi...

Page 3: ...ector housing height to clear gravel or crushed rock surfaces 6 Disengage all clutch levers before starting the engine 7 Never attempt to make any adjustments while engine is running except where spec...

Page 4: ...Disengage all clutch levers 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 cle...

Page 5: ...the lower chute crank Insert the upper chute crank into the lower chute crank and align the holes Re insert the hairpin clip into the hole to secure the two chute cranks See Figure 2 Figure 2 Attachin...

Page 6: ...per handle the auger control handle is used to engage and disengage the auger The snow thrower is designed to propell by the rotation of the auger Pull the control handle back against the upper handle...

Page 7: ...rate engine manual packed with your snow thrower To Start Engine Insert ignition key into slot Turn key to ON position Now follow the instructions below as it pertains to your unit Electric Starter Fi...

Page 8: ...for several seconds The unusual sound made by spinning the starter will not harm engine or starter Disconnect the power cord from receptacle first and then from switch box Recoil Starter With engine...

Page 9: ...handle provides adjustment for belt tension To adjust disconnect the Z end of control cable from the bottom hole in the control handle See Figure 10 Hook the cable into the upper hole in control hand...

Page 10: ...ructions on page 9 Tighten securely Figure 14 Engine Refer to the separate engine manual for all engine maintenance procedures Check engine and snow thrower frequently for loose hardware and tighten a...

Page 11: ...spark plug 5 Clean spark plug readjust gap or replace 6 Prime engine four times 7 Wait at least ten minutes before starting Engine runs erratic 1 Unit running on choke 2 Fuel line blocked or stale fue...

Page 12: ...MODEL SNOW BOSS 721 15 9 21 6 6 21 6 21 4 20 16 24 14 17 23 3 8 22 10 13 2 1 25 60 7 18 11 11 19 12 5 5 5 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 33 41 42 43 44 45 46 47 48 49 50 42 49 51 52 53...

Page 13: ...riage Bolt 32 710 0642 TT Screw 1 4 20 x 0 75 33 710 0773 TT Screw 3 8 16 x 0 5 34 710 0896 AB Screw 1 4 14 x 0 625 35 710 1005 B Screw 1 4 14 x 0 5 36 711 0848A Axle Tube 37 712 0116 Jam Lock Nut 38...

Page 14: ...s Tank 19 751 0603 Fuel Cap 20 754 0101A V Belt 21 756 0416B V Pulley Half 22 756 0475 Pulley 23 784 0322 Engine Mount 24 784 0323 Support Bracket 25 784 0374 Support Plate Engine Mount Ref No Part No...

Page 15: ...0451 Carr Bolt 5 16 18 x 0 750 3 710 3015 Hex Screw 1 4 20 x 0 75 4 712 3027 Lock Nut 5 712 3068 Hex Lock Nut 6 720 0284 Hand Knob 7 731 0851A Flange Keeper Chute 8 731 0915B Lower Chute 9 731 0921 Up...

Page 16: ...these items b Routine maintenance items such as lubricants filters blade sharpening and tune ups or adjustments such as brake adjustments clutch adjustments or deck adjustments and normal deteriorati...

Reviews: