Tecumseh AV520 - Operator'S Manual Download Page 3

181-624-14

Two-Cycle Engine • Vertical Crankshaft • Air-Cooled

Page 1

I. General Safety Precautions

!

WARNING

A. Avoid Carbon Monoxide Poisoning

All engine exhaust contains 
carbon monoxide, a deadly 
gas. Breathing carbon 
monoxide can cause 
headaches, dizziness, 
drowsiness, nausea, confusion 
and eventually death. 

Carbon monoxide is a colorless, odorless, tasteless gas 
which may be present even if you DO NOT see or smell 
any engine exhaust. Deadly levels of carbon monoxide can 
collect rapidly and you can quickly be overcome and 
unable to save yourself. Also, deadly levels of carbon 
monoxide can linger for hours or days in enclosed or 
poorly-ventilated areas. If you experience any symptoms of 
carbon monoxide poisoning, leave the area immediately, 
get fresh air, and SEEK MEDICAL TREATMENT.

To prevent serious injury or death from carbon monoxide:

• NEVER run engine indoors. Even if you try to 

ventilate engine exhaust with fans or open windows 
and doors, carbon monoxide can rapidly reach 
dangerous levels. 

• NEVER run engine in poorly-ventilated or partially 

enclosed areas such as barns, garages, 
basements, carports, under dwellings, or in pits.

• NEVER run engine outdoors where engine exhaust 

can be drawn into a building through openings such 
as windows and doors.

B. Avoid Gasoline Fires

Gasoline (fuel) vapors are highly flammable 
and can explode. Fuel vapors can spread 
and be ignited by a spark or flame many feet 
away from engine. To prevent injury or death 
from fuel fires, follow these instructions:

• NEVER store engine with fuel in fuel 

tank inside a building with potential 
sources of ignition such as hot water and space 
heaters, clothes dryers, electric motors, etc.

• NEVER remove fuel fill cap or add fuel when engine 

is running.

• NEVER start or operate the engine with the fuel fill 

cap removed.

• Allow engine to cool before refueling.

• NEVER fill fuel tank indoors. Fill fuel tank outdoors 

in a well-ventilated area.

• DO NOT smoke while refueling tank.

• Use only an approved red GASOLINE container 

to store and dispense fuel. TecumsehPower 
Company recommends purchasing gasoline in 
containers with a capacity of 2.5 gallons or less. 
Small containers are easier to handle and help 
eliminate spillage during refueling.

• DO NOT pour fuel from engine or siphon fuel by 

mouth. To empty fuel tank see "I. Draining Fuel" 
instructions on page 13.

C. Adult Supervision of Operation, Refueling 

and Maintenance

The manufacturer of the equipment may provide 
information about who is allowed to use this engine (see 
equipment manufacturer’s manual).

 

NOT everyone who is 

allowed to use this engine is capable of safely and 
responsibly operating, maintaining and/or fueling it. 
TecumsehPower Company recommends the following:

• An adult should fuel this engine. NEVER allow 

children to refuel this engine. See "B. Filling Fuel 
Tank" instructions on page 4. 

• An adult should perform maintenance on this 

engine. See "VII. Maintenance" instructions on 
page 8. Only allow children to perform maintenance 
if an adult has determined they are experienced and 
capable of such operation.

• An adult should start the engine. See "G. Avoid 

Accidental Starts" instructions on page 2. Only allow 
children to start the engine if an adult has 
determined they are experienced and capable of 
such operation.

• To avoid unsupervised operation of the engine, 

especially by children, NEVER leave it unattended 
when it is running. Remove ignition key, if equipped.

D. Stay Away from Rotating Parts

NEVER operate the engine with an unguarded engine shaft 
or flywheel.

The equipment manufacturer may attach 
a sprocket and chain or pulley and belt to 
the engine shaft. If these parts are NOT 
properly guarded, or if you are NOT sure 
whether they are properly guarded, DO 
NOT use your engine; contact the 
equipment manufacturer. Hands, feet, 
hair, jewelry, clothing, etc. can become 
entangled in rotating parts, leading to 
serious injury or death. To avoid serious 
injury or death, be sure the flywheel 
guard is in place. 

Read equipment manufacturer’s manual and this
material thoroughly before using this engine. Failure to
do so can result in serious injury or death. Consult

 

your

local Authorized TecumsehPower Servicing Dealer, call
1-800-558-5402, or go to www.TecumsehPower.com for
additional information.

Summary of Contents for AV520 -

Page 1: ...IX Storing Your Engine 12 X Preventing Forest Brush and Grass Fires 14 XI Maintenance Intervals 14 California US EPA Emission Control Warranty Statement 20 Emission Control System Warranty 21 XII War...

Page 2: ...ourself with operating maintenance components and safety instructions Notice Regarding Emissions NOTE Engines which are certified to comply with California and U S EPA emission regulations for SORE Sm...

Page 3: ...fuel TecumsehPower Company recommends purchasing gasoline in containers with a capacity of 2 5 gallons or less Small containers are easier to handle and help eliminate spillage during refueling DO NOT...

Page 4: ...ay from metal parts where arcing could occur Carefully attach the spark plug wire to the grounding post if provided Disconnect battery at negative terminal first if engine is equipped with a DC electr...

Page 5: ...il instructions on page 4 Afterward continue reading instructions below NOTES Use of NMMA TC WII or TC W3 JASO FB or JASO FC classified oil is recommended Special formulated oils are available at your...

Page 6: ...t should fuel this engine NEVER allow children to refuel this engine Gasoline fuel vapors are highly flammable and can explode Fuel vapors can spread and be ignited by a spark or flame many feet away...

Page 7: ...an adult has determined they are experienced and capable of such operation If you are unable to start this engine after following instructions in this manual contact your Authorized TecumsehPower Serv...

Page 8: ...dle See Figure 14 on page 7 Afterward continue reading instructions below a Pull rope out slowly until you feel drag b Without allowing the rope to retract continue pulling rope with one rapid full ar...

Page 9: ...original position between pushes See Figure 13 NOTES Cooler temperatures may require pushing primer bulb firmly with your thumb 5 times DO NOT use choke or primer bulb to restart a warm engine after...

Page 10: ...ce heaters clothes dryers electric motors etc Doing so may lead to an explosion resulting in death or serious injury 1 Move remote control on equipment or engine mounted control or any ignition stop s...

Page 11: ...is guard or a metal debris guard called the Top Hat Both debris guards must also be kept clean to prevent engine overheating See Figure 19 NOTES Contact your Authorized TecumsehPower Servicing Dealer...

Page 12: ...ly dry 4 Saturate with engine oil and press DO NOT twist to distribute oil 5 Remove excess oil II Servicing Screens 1 Wash in a solution of water and detergent 2 Rinse thoroughly in clear water Air dr...

Page 13: ...will VOID THE ENGINE WARRANTY F Muffler and Cylinder Exhaust Ports The muffler and cylinder exhaust ports require cleaning after every 75 to 100 hours of operation NOTE For this maintenance procedure...

Page 14: ...stabilizer it is likely that your carburetor will have gum deposits a clogged fuel system and WILL VOID YOUR WARRANTY Prepare the fuel for extended storage See B Extended Storage instructions on page...

Page 15: ...t is not necessary to lubricate the cylinder bore II Oil Cylinder Bore When lubricating cylinder bore fuel may spray from spark plug hole To prevent serious injury from fuel fires follow these instruc...

Page 16: ...aintenance Every 5 Hours or Before Each Use 1 Clean Cooling Fins Date_______________Owner Dealer Date_______________Owner Dealer Date_______________Owner Dealer Date_______________Owner Dealer Date___...

Page 17: ..._Owner Dealer Date_______________Owner Dealer Date_______________Owner Dealer Date_______________Owner Dealer Every 100 Hours or Seasonally 1 Replace Spark Plug Date_______________Owner Dealer Date___...

Page 18: ...Page 16 Two Cycle Engine Vertical Crankshaft Air Cooled 181 624 14...

Page 19: ...181 624 14 Two Cycle Engine Vertical Crankshaft Air Cooled Page 17 NOTES...

Page 20: ...Page 18 Two Cycle Engine Vertical Crankshaft Air Cooled 181 624 14...

Page 21: ...181 624 14 Two Cycle Engine Vertical Crankshaft Air Cooled Page 19 NOTES...

Page 22: ...ny may deny you warranty coverage if your small off road engine or a part thereof has failed due to abuse neglect improper main tenance or unapproved modifications You are responsible for presenting y...

Page 23: ...acement the part shall be repaired or replaced by TecumsehPower Company according to Subsection 4 below Any such emissions related part repaired or replaced under the ECS Warranty shall be warranted f...

Page 24: ...ngine model number on the Important Engine Information decal One letter in the engine model number will be surrounded by parenthesis A B C D E H K or M and that letter is your engine warranty category...

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