Viper 31320E User manual

Operator's Manual
Original Operating Instructions
Viper®196cc
4-Cycle Engine
P/N: OM31320E
Rev. 08/23/11
Get parts online at
www.getearthquake.com
Includes Model: 31320E, 31320, 31330

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-52
INTRODUCTION
Congratulations on your investment in quality. Thank you for purchasing a Viper® Engine. We have worked to ensure that your
engine meets the highest standards for usability and durability. With proper care, your engine will provide many years of service.
Please read this entire manual before installation and use. Viper® reserves the right to change, alter or improve the product
and this document at any time without prior notice.
CONTENTS
Introduction .......................................................................................................................................................................................................................................2
Warnings and Safety Precautions...........................................................................................................................................................................................3-6
Specications.....................................................................................................................................................................................................................................6
Features ...............................................................................................................................................................................................................................................7
Operation......................................................................................................................................................................................................................................8-11
Maintenance and Storage....................................................................................................................................................................................................12-16
Troubleshooting and Repair................................................................................................................................................................................................17-18
Parts Breakdown......................................................................................................................................................................................................................19-21
Warranty ..................................................................................................................................................................................................................................... 22-23
FEDERAL EMISSION INFORMATION
Viper® warrants to the retail purchaser, that this small, o-road engine was designed, built and equipped to conform at the time of
initial sale to all applicable regulations of the U.S. Environmental Protection Agency (EPA) and those of the State of California (CARB).
REGISTRATION AND SERVICE
This manual may contain information for several models. Read and keep this manual for future reference. This manual contains
important information on SAFETY, ASSEMBLY, OPERATION, AND MAINTENANCE. The owner must be certain that all the product
information is included with the unit. This information includes the MANUAL, the REPLACEMENT PARTS and the WARRANTIES.
This information must be included to make sure state laws and other laws are followed. This manual should remain with the
engine even if it is resold.
OWNERSHIP RECORDS
Owner’s Name:
Owner’s Address:
City: State/Province: Zip Code/Postal Code:
Model Number: Serial Number:
Date of Purchase:
Notes:
Record the engine model number and serial number in the space provided for easy reference when ordering parts or requesting
technical support. Excluding emissions-related warranty items, the warranty is valid only if the completed registration is received by
Viper® within 30 days of purchase. (SEE WARRANTY SECTION FOR MORE INFORMATION.) You can register your warranty online
by visiting www.getearthquake.com, or by mailing it to: Viper® Engines, 1160 Eighth Avenue, Cumberland, WI 54829. If you do not
have a computer, call our customer service department at [phone] Mondays through Fridays from 8 a.m. to 5 p.m. CST.

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 3
WARNINGS AND SAFETY PRECAUTIONS
OPERATOR’S RESPONSIBILITY
Accurate, safe and eective use of this engine is the operator’s
responsibility.
• Readandfollowallsafetyinstructions.
• Maintainthe engineaccordingto directions and schedule
included in this Viper® operator’s manual.
• Ensurethatanyonewhousestheengineisfamiliarwithand
understands all controls and safety precautions.
SAFETY MESSAGES
Your manual contains special messages to bring attention to
potential safety concerns, engine damage as well as helpful op-
erating and servicing information. Please read all the informa-
tion carefully to avoid injury and engine damage.
NOTE: General information is given throughout the manual
that may help the operator in the operation or service of the
engine.
This symbol points out important safety instruc-
tions which if not followed could endanger your
personal safety.
BEFORE OPERATING ENGINE:
WARNING
WARNING INDICATES A HAZARD WHICH, IF NOT
AVOIDED, COULD RESULT IN DEATH OR SERIOUS IN
JURY AND/OR PROPERTY DAMAGE.
CAUTION
CAUTION INDICATES YOU CAN BE HURT OR YOUR
EQUIPMENT DAMAGED IF THE SAFETY INSTRUC
TIONS THAT FOLLOW THIS SIGNAL WORD ARE NOT
OBEYED.
WARNING
CALIFORNIA PROPOSITION 65 WARNING
ENGINE EXHAUST FROM THIS PRODUCT CONTAINS
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA
TO CAUSE CANCER, BIRTH DEFECTS, OR OTHER RE
PRODUCTIVE HARM.
IMPORTANT
INDICATES HELPFUL INFORMATION FOR PROPER AS
SEMBLY, OPERATION, OR MAINTENANCE OF YOUR
EQUIPMENT.
WARNING
FAILURE TO COMPLY WITH ALL SAFETY AND OPERAT
ING INSTRUCTIONS CAN RESULT IN LOSS OF ENGINE
CONTROL, SERIOUS PERSONAL INJURY TO YOU AND/
OR BYSTANDERS, AND RISK OF EQUIPMENT AND
PROPERTY DAMAGE.
WARNING
READ ENTIRE OPERATING AND MAINTENANCE
INSTRUCTIONS FOR THIS PRODUCT AND THE
INSTRUCTIONS FOR THE EQUIPMENT THIS ENGINE
POWERS. FAILURE TO FOLLOW INSTRUCTIONS COULD
RESULT IN SERIOUS INJURY OR DEATH. OPERATE THE
ENGINE ACCORDING TO THE SAFETY INSTRUCTIONS
OUTLINED HERE AND INSERTED THROUGHOUT THE
TEXT. ANYONE WHO USES THIS ENGINE MUST READ
THE INSTRUCTIONS AND BE FAMILIAR WITH THE
CONTROLS.
WARNING
CERTAIN COMPONENTS IN THIS PRODUCT AND
ITS RELATED ACCESSORIES CONTAIN CHEMICALS
KNOWN TO THE STATE OF CALIFORNIA TO CAUSE
CANCER, BIRTH DEFECTS, OR OTHER REPRODUCTIVE
HARM. WASH HANDS AFTER HANDLING.

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-54
CAUTION
HOT GASES ARE A NORMAL BYPRODUCT OF A FUNC
TIONING CATALYTIC CONVERTER. FOLLOW ALL SAFE
TY INSTRUCTIONS TO PREVENT BURNS AND FIRES.
DO NOT ALTER/MODIFY ENGINE:
NEVER ALTER OR MODIFY THE ENGINE FROM THE
FACTORY. SERIOUS INJURY OR DEATH MAY OCCUR IF
ENGINE IS MODIFIED OR ALTERED.
WHEN WORKING ON OR REPLACING PARTS FOR THE
ENGINE OR PRODUCT, YOU MUST ALWAYS DISCON
NECT SPARK PLUG WIRE FROM THE SPARK PLUG AND
KEEP IT AWAY FROM THE SPARK PLUG.
ENGINE SAFETY PRECAUTIONS
Preventing Carbon Monoxide Poisoning
• Never try to ventilate engine exhaust indoors. Carbon
monoxide can reach dangerous levels very quickly.
• Never run engine outdoors where exhaust fumes may be
pulled into a building.
• Never run engine outdoors in a poorly ventilated area where
the exhaust fumes may be trapped and not easily taken
away. (Examples include: in a large hole or areas where hills
surround your working area.)
• Never run engine in an enclosed or partially enclosed area.
(Examples include: buildings that are enclosed on one or
more sides, under tents, car ports or basements.)
• Always run the engine with the exhaust and muer pointed
in the direction away from the operator.
• Never point the exhaust muer towards anyone. People
should always be many feet away from the operation of the
engine and its attachments.
• Do not change the engine governor settings or over-speed
the engine.
• Stay away from rotating parts. Place protective covers over
rotating parts.
• Do not use engine around dry brush, cloth rags, or other
ammable materials.
• Always keep materials and debris clear of muer guard
and other hot engine parts.
• Never operate the engine without the muer guard in
place.
• Always make sure exhaust pipe is free of foreign objects.
• The engine exhaust becomes very hot during operation.
Keep engine at least three feet away from buildings and
other equipment during operation.
• Wear appropriate clothing such as a long-sleeved shirt or
jacket. Also wear long trousers or slacks. Do not wear shorts.
Never wear sandals, sneakers, or open shoes, and never
operate the machine with bare feet.
• Do not wear loose clothing or jewelry. They can get caught in
moving parts. Always keep hands, feet, hair and loose clothing
away from any moving parts on engine and machine.
WARNING
ENGINES GIVE OFF CARBON MONOXIDE, AN ODOR
LESS, COLORLESS, POISONOUS GAS. CARBON MON
OXIDE MAY BE PRESENT EVEN IF YOU DO NOT SMELL
OR SEE ANY ENGINE EXHAUST. BREATHING CAR
BON MONOXIDE CAN CAUSE NAUSEA, FAINTING OR
DEATH, IN ADDITION TO DROWSINESS, DIZZINESS
AND CONFUSION.
IF YOU EXPERIENCE ANY OF THESE SYMPTOMS, SEEK
FRESH AIR AND MEDICAL ATTENTION IMMEDIATELY.
START AND RUN ENGINE OUTDOORS. DO NOT START
OR RUN ENGINE IN ENCLOSED AREA, EVEN IF DOORS
OR WINDOWS ARE OPEN.
Gasoline Fires and Handling Fuel Safely
Use extra care in handling gasoline and other fuels. They are
ammable and vapors are explosive.
• When storing extra fuel be sure that it is in an appropriate
container and away from any re hazards.
• Prevent re and explosion caused by static electric discharge.
Use only nonmetal, portable fuel containers approved by the
Underwriter’s Laboratory (U.L.) or the American Society for
Testing & Materials (ASTM).
• Always ll fuel tank outside in a well ventilated area. Never
fill your fuel tank with fuel indoors. (Examples include:
basement, garage, barn, shed, house, porch, etc.) Never
ll tank near appliances with pilot lights, heaters, or other
ignition sources. If the fuel has to be drained, this should
be done outdoors. The drained fuel should be stored in a
container specically designed for fuel storage or it should
be disposed of carefully.
• Never remove the fuel cap or add fuel with the engine
running. Stop engine and allow to cool before removing the
fuel cap/and or relling the engine.
• Do not smoke.
• Never drain fuel from engine in an enclosed area.
• Always wipe up excess (spilled) fuel from engine before

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 5
SERVICE
• Always stop the engine whenever you leave the equipment,
before cleaning, repairing or inspecting the unit. Engine
should be turned o and cool, spark plug wire must be
removed from spark plug before any repairs or adjustments
are attempted. Never make adjustments or repairs with the
engine (motor) running. Disconnect the spark plug wire,
and keep the wire away from the plug to prevent accidental
starting. Remove the ignition key if equipped with an electric
start.
• Always wear eye protection when you make adjustments or
repairs.
• Keep all nuts and bolts tight and keep equipment in good
condition.
• Never tamper with safety devices. Check their proper
operation regularly.
• When servicing or repairing the engine, do not tip the engine
over or up unless specically instructed to do so in this manual.
Service and repair procedures can be done with the engine
in an upright position. Some procedures will be easier if the
engine is lifted on a raised platform or working surface.
• To reduce re hazard, keep engine free of grass, leaves, or
other debris build-up. Clean up oil or fuel spillage. Allow
engine to cool before storing.
• Stop and inspect the equipment if you strike an object.
Repair, if necessary, before restarting.
• Clean and replace safety and instruction decals as necessary.
• To guard against engine over-heating, always keep recoil
housing clean.
• Inspect engine before storage. When not in use, disconnect
spark plug lead and store indoors in a dry place locked or
otherwise inaccessible to children.
• Use only original equipment parts from Viper®, including all
nuts and bolts.
starting. Clean up spilled fuel immediately. If fuel is spilled,
do not start the engine but move product and fuel container
from area. Clean up spilled fuel and allow to evaporate and
dry after wiping and before starting.
• Allow fuel fumes/vapors to escape from the area before
starting engine.
• Test the fuel cap for proper installation before starting and
using engine.
• Always run the engine with fuel cap properly installed on
the engine.
• Never smoke while relling engine fuel tank.
• Do not store engine with fuel in fuel tank indoors. Fuel and
fuel vapors are highly explosive.
• Never pour fuel from engine fuel tank.
• Never siphon fuel by mouth to drain fuel tank.
• Always have an adult fill the fuel tank and never allow
children to ll the engine.
• Never allow an adult or anyone under the inuence of drugs
or alcohol to ll engine.
• When storing gasoline or equipment with fuel in the tank,
store away from furnaces, stoves, water heaters or other
appliances that have a pilot light or other ignition source
because they can ignite gasoline vapors.
BURNS AND FIRES
The muer, muer guard and other parts of the engine be-
come extremely hot during the operation of the engine. These
parts remain extremely hot after the engine has stopped.
Prevention of Burns and Fires
• Neverremovethemuerguardfromtheengine.
• Nevertouchthemuerguardbecauseitisextremelyhot
and will cause severe burns.
• Never touch parts oftheenginethatbecomehot after
operation.
• Alwayskeepmaterialsanddebrisawayfrommuerguard
and other hot parts of the engine to avoid res.
• Thisengineisdesignedtooperateusingacatalyticconverter
which contributes to the engine’s compliance with the EPA.

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-56
SPECIFICATIONS
Fire hazards
Wear eye protection
Shock hazard
Hot surfaces
Toxic fumes
Moving parts
Read manual before operation
Slow
Fast
Fuel
Oil
Choke
On/O
Fuel Shuto
SAFETY SYMBOLS
C
G
Operational Control Symbols
The following symbols may be used on your engine to alert you to potential hazards or to give you guidance in operating your
engine. Look over them and understand their meanings before operating your engine.
Safety or Hazard Symbols
Hot! Do not touch!
Displacement/Stroke 196 cc; 4-stroke
Ignition Type Electronic ignition
Cooling System Forced air cooling
Idling Carburetor Adjust 1700 +/- 150 RPM
Valve Clearance Cold engine-Intake: 0.15 +/- 0.02 mm;
Exhaust: 0.20 +/- 0.02 mm
Maximum Torque 11-N.M./2500 RPM (8.11 ft. lbs.)
Bore and Stroke 68 x 54 mm
Spark Plug Type ~0.8 mm gap Torch F6TC, or use NGK B4, Champion N9YC or RN9YC
Gasoline Type Unleaded
Gasoline Tank Capacity 0.95 gallon (3.6 liters)
Drive Shaft Type Horizontal, 3/4”straight, (3/16”) keyed shaft with ball bearings. Direction: coun-
terclockwise (facing shaft); Length: 2-1/4”; Central thread: 5/16”-24
Start Type Recoil
Speed 3600 RPM
Oil Capacity and Type 0.528 quart (0.5 liters); SAE 30 (in freezing weather use 5W30)
Weight 33.8 lbs.
Overall Dimensions 12-3/4” L x 14”W x 10-1/4” H

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 7
FEATURES
WARNING
DO NOT REFUEL WHILE SMOKING,NEAR OPEN FLAME,
OR OTHER POTENTIAL HAZARDS.
FUEL IS HIGHLY FLAMMABLE AND MUST BE HANDLED
WITH CARE. NEVER FILL THE TANK WHEN THE ENGINE
IS HOT OR RUNNING. ALWAYS MOVE OUTDOORS TO
FILL THE TANK.
IMPORTANT
ENGINE IS SHIPPED FROM FACTORY WITHOUT OIL.
YOU MUST ADD ENGINE OIL BEFORE STARTING EN
GINE. IF ENGINE IS STARTED WITHOUT OIL, ENGINE
MAY BE DAMAGED BEYOND REPAIR AND WILL NOT BE
COVERED BY WARRANTY.
fuel shut-o
muer
gas tank
gas cap
air cleaner
recoil
start handle
choke
oil drain plug
oil ll
On/O switch
serial number location
31320/31330
Manual Start Model
electric
key start
31320E-Electric
Start Model
Model Number Location

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-58
OPERATION
PREOPERATION INSPECTION
1. Check that the engine is equipped with the proper amount
and type of oil. For the most appropriate type of oil to use,
see chart below.
2. Check that the engine has appropriate amount of fuel.
3. Examine underneath and around engine for signs of oil or
fuel leaks.
4. Inspect fuel hoses and connections for tightness and fuel
seepage.
5. Look for signs of engine damage.
6. Check that all guards and shields are in place, and all screws,
nuts and bolts are tightened.
7. Eliminate excessive debris around muer and recoil starter.
8. Be sure air lter and cylinder ns are clean and free of debris.
9. Check the equipment powered by this engine. Review the
operator’s manual provide with the equipment powered
by this engine for any safety and warning precautions and/
or procedures that should be followed before starting this
engine.
Choosing Oil Type
WARNING
DO NOT ATTEMPT TO START ENGINE IN THE FOLLOW
ING WAYS:
• DONOTusesTarTiNgfluiD.
• DONOTsprayflammableliquiDsOrvapOrs
INTO AIR CLEANER, CARBURETOR OR SPARK PLUG
CHAMBER.
• DO NOT remOve spark plug aND pull ON
STARTER ROPE. FLAMMABLE FUEL CAN SPRAY OUT
AND IGNITE FROM A SPARK FROM SPARK PLUG.
DO NOT REFUEL WHILE SMOKING,NEAR OPEN FLAME,
OR OTHER POTENTIAL HAZARDS.
FUEL IS HIGHLY FLAMMABLE AND MUST BE HANDLED
WITH CARE. NEVER FILL THE TANK WHEN THE ENGINE
IS HOT OR RUNNING. ALWAYS MOVE OUTDOORS TO
FILL TANK.
CAUTION
FOR THE SAFETY OF THE USER, AND TO MAXIMIZE
THE LIFE OF THE ENGINE, IT IS CRUCIAL TO TAKE TIME
TO CHECK THE CONDITION OF THE ENGINE. PROB
LEMS MUST BE CORRECTED BEFORE OPERATING.
AVOID INJURY! ENGINE OIL IS HAZARDOUS TO YOUR
HEALTH. DISPOSE OF OIL APPROPRIATELY. USE A
SAFE DISPOSAL/RECYCLING CENTER.
CAUTION
ENGINE IS SHIPPED FROM FACTORY WITHOUT OIL.
YOU MUST ADD ENGINE OIL BEFORE STARTING EN
GINE.
WARNING
IMPROPERLY MAINTAINING THIS ENGINE, OR FAIL
URE TO CORRECT A PROBLEM BEFORE OPERATION,
CAN CAUSE A MALFUNCTION WHICH MAY RESULT
IN SERIOUS INJURY OR DEATH. ALWAYS PERFORM A
PREOPERATION INSPECTION BEFORE EACH OPERA
TION AND CORRECT ANY PROBLEM.
SAE
Temperature
Environment Temperature

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 9
CHECKING AND ADDING OIL
Be sure the engine is located on a level surface before checking
or relling oil.
1. Clean around oil ll area and drain plug. SEE FIGURE 1.
2. Slide out dipstick and wipe clean with cloth. SEE FIGURE 1.
3. Reinsert and tighten dipstick.
4. Slide out dipstick and check oil.
5. If oil level is below the top thread of the oil ll hole, rell to
upper level. SEE FIGURE 1.
6. Change oil if contaminated.
Viper® engine oil may be put in through the oil dipstick hole or
through the oil ll plug opening. If an oil plug is present, loosen
screw and ll oil until oil level is even with top thread in plug hole.
CHECKING AND FILLING FUEL TANK
Be sure the engine is located on a level surface before checking
or refilling fuel. Use unleaded regular, unleaded premium
automotive fuels only. Commercial fuel may contain up to
10% ethanol. Ethanol additives to fuel are known to cause
deterioration of fuel lines and other fuel components. Viper®
recommends the addition of fuel stabilizer to protect your
engine’s fuel system and prolong the life of your engine. DO
NOT mix oil with fuel.
1. Make sure engine is cool and not running while lling.
2. Remove fuel cap.
3. Fill tank to fuel level limit. SEE FIGURE 2.
Note: Do not overll.
3. Replace cap and remove any spilled fuel before operating.
WARNING
FUEL IS HIGHLY FLAMMABLE AND MUST BE HANDLED
WITH CARE. NEVER FILL THE TANK WHEN THE ENGINE
IS HOT OR RUNNING. ALWAYS MOVE OUTDOORS TO
FILL THE TANK.
upper level
lower level
Figure 1
oil ll area/
dipstick
oil drain
plug
Figure 2
A
A
SECTION A-A
SCALE 1 : 5
B
DETAIL B
SCALE 1 : 3
PARTS TO BE FREE OF
BURRS AND SHARP EDGES
THIS DRAWING AND ALL INFORMATION CONTAINED HEREIN IS AND REMAINS THE PROPERTY OF ARDISAM INC.
AND IS CONFIDENTIAL. IT IS SUBMITTED AND MAY BE USED ONLY IN CONNECTION WITH ARDISAMS' PROPOSALS
AND/OR ITS CUSTOMERS' ORDERS. IT SHALL NOT BE DISCLOSED TO OTHERS OR COPIED WITHOUT ARDISAMS'
SPECIFIC WRITTEN CONSENT AND SHALL BE IMMEDIATELY RETURNED UPON REQUEST.
MATERIAL NAME
TREATMENT
DR BY APPD PRT NO
92000
PT WEIGHT
SURFACE AREA DATE
REVISION
THIRD ANGLE PROJECTION
SEE BILL OF MATERIALS
NONE
8153 1776531
ENGINE 196CC XINGYUE
HORIZ THREADED M16X1.5
3
LAR
RJR 8/22/11
7/28/2011
SHEET: 1 OF 1
ALL ANGLES ARE DECIMAL DEGREES
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN MILLIMETERS
THREADS CLASS 2
0.0 ± 1.0°
0 ± 2°
ANGLES:
0.000 ± 0.250 MM
0.00 ± 0.75 MM
0.0 ± 2.5 MM
OTHERWISE NOTED:
TOLERANCE UNLESS
fuel level limit

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-510
STARTING AND STOPPING ENGINE
Note: Operating engine on a steep angle will cause the
engine to lose lubrication and seize.
Review “safety and warning precautions” and “pre-operation
inspection”sections before starting engine.
Manual-Start Engine
1. Move the fuel valve lever to the ON position.
2. Move engine to a well-ventilated area, always outdoors, to
prevent carbon monoxide poisoning.
3. Move to an area away from ames or sparks, to avoid ignition
of vapors if present.
4. Remove all debris from air cleaner holes and fuel cap to
ensure proper air ow.
5. Move throttle 1/3 of the way toward the highest speed
position.
6. Close the choke lever:
• Iftheengineiscoldortheambienttemperatureislow,close
the choke lever fully. SEE FIGURE 5.
• Iftheengineiswarmortheambienttemperatureishigh,
open the choke lever half-way or keep it fully open. SEE
FIGURE 4 AND 3.
Figure 4
Figure 5
Figure 3
WARNING
CARBON MONOXIDE GAS IS TOXIC. INHALATION CAN
CAUSE UNCONSCIOUSNESS AND DEATH.
NEVER LEAVE ENGINE RUNNING WHILE UNATTENDED.
CAUTION
DO NOT STOP ENGINE BY MOVING CHOKE CONTROL
TO CHOKE. BACKFIRE, ENGINE DAMAGE, OR FIRE
MAY OCCUR.
“Half Choke”
position
“Closed Choke”
position
“Open Choke”
position

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 11
7. Turn the On/O switch to the ON position. SEE FIGURE 6.
8 Grasp starter handle and pull out slowly, until resistance is
felt. Without letting it retract, pull rope with a rapid stroke.
DO NOT pull out the rope all of the way. Let it return to its
original position very slowly. Repeat this step until engine
starts.
9. After engine begins operating, move choke lever to “Half
Choke.” SEE FIGURE 4.
10. Run engine for 30 to 45 seconds at “Half Choke” position
until engine warms up.
11. After starting the engine, slowly move the choke lever to
the “Open Choke” position as the engine warms up. Move
throttle to desired speed. SEE FIGURE 3.
Electric-Start Engine
1. Repeat steps 1-6 under “Manual-Start Engine” heading on
previous page.
2. Insert key and turn to start.
3. Refer to steps 8-10 under“Manual-Start Engine”heading.
To Stop the Engine:
1. Set the throttle lever to the low speed position and allow the
engine to run at low speeds for 1-2 minutes before stopping.
2. On manual-start models, turn the On/O switch to the OFF
position. For electric-start engines, turn the key to the OFF
position. SEE FIGURE 7.
3. Close the fuel valve.
4. Pull the starter handle slowly and return the handle to its
original position when resistance is felt. This operation will
prevent outside moisture from entering the combustion
chamber.
Stopping the Engine with the Fuel Valve:
Close the fuel valve and wait until the engine stops. Avoid letting
fuel remain in the carburetor over long periods, or the passages
of the carburetor may become clogged with impurities and
malfunction may result. (SEE FIGURE 16.)
Figure 6
Figure 7
A
B
A
B

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-512
MAINTENANCE SCHEDULE
MAINTENANCE ITEM
Every 8 hours
(daily)
Every 50 hours
or monthly
Every 100 hours
or seasonally
Every 300 hours
or yearly
Clean Engine and
Check Bolts and Nuts
X
Engine Oil Check X
(See Lubrication section) Change * (initial 5 hours) X
Oil in Gear Reduction
(if equipped)
Change X
Air Filter Check X X
(See Air Filter section) Clean ** X
Replace X X
Spark Plug (Gap .030”) Check-Adjust X
(See Spark Plug section) Replace X
Fuel Filter Clean *** X
(See Fuel Filter section) Replace
* Perform initial oil change after rst 5 hours of operation, then every 50 hours or every season
** Service more frequently under dusty conditions
*** These items should only be performed by a mechanically procient person or by the servicing dealer
MAINTENANCE AND STORAGE
Please read the maintenance schedule, and observe these
recommended care operating intervals to extend the life of
your engine.
Good maintenance is essential for safe, economical, and trouble-
free operation. It will also help reduce air pollution. To help
you properly care for your engine, the following pages include
a maintenance schedule, routine inspection procedures, and
simple maintenance procedures using basic hand tools. Other
service tasks that are more dicult, or require special tools, are
best handled by professionals and are normally performed by a
technician or other qualied mechanic.
Maintenance, replacement or repair of the emissions control
devices and systems may be performed by any non-road
engine repair establishment or individuals. However, items
must be serviced by an authorized dealer to obtain "no
charge" emissions control service.
The maintenance schedule applies to normal operating
conditions. If you operate your engine under unusual conditions,
such as sustained high-load or high-temperature operation, or
use in unusually wet or dusty conditions, consult your servicing
dealer for recommendations applicable to your individual needs
and use.
CAUTION
TO PREVENT ACCIDENTAL STARTING:
AVOID INJURY! ENGINE MUST BE TURNED OFF AND
COOL AND SPARK PLUG WIRE MUST BE REMOVED
FROM SPARK PLUG BEFORE CHECKING AND ADJUST
ING ENGINE OR EQUIPMENT.
AVOID INJURY! TEMPERATURE OF MUFFLER AND
NEARBY AREAS MAY EXCEED 150° F 65° C. AVOID
THESE AREAS.
AVOID INJURY! CHECK ENGINE OFTEN FOR LOOSE
NUTS AND BOLTS. KEEP THESE ITEMS TIGHTENED.
WARNING
IMPROPER MAINTENANCE, OR FAILURE TO CORRECT
A PROBLEM BEFORE OPERATION CAN CAUSE A MAL
FUNCTION WHICH MAY RESULT IN SERIOUS INJURY
OR DEATH. ALWAYS FOLLOW THE INSPECTION AND
MAINTENANCE RECOMMENDATIONS AND SCHED
ULES IN THIS OPERATOR’S MANUAL.

Operator’s Manual
Viper® 196cc 4-Cycle Engine
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ENGINE MAINTENANCE
For daily maintenance checks, review“pre-operation inspection”
section.
Lubrication
Choose engine oil that meets or surpasses the latest API service
classication. Synthetic oils may be substituted for petroleum-
based oils in extreme temperatures. For temperatures higher
than 32º F, use SAE 30 or SAE 10W-30 motor oil. Use SAE 5W-30
or SAE 10W if temperatures are below 32º F. DO NOT USE SAE
10W40 MOTOR OIL.
Oil Maintenance
After the rst ve hours of operating a new Viper® Engine the
oil should be replaced, and every 50 hours of operating time
thereafter. The oil should be changed every 25 hours if used
under severe conditions, such as in high temperatures or under
heavy loads, otherwise changed weekly. Check oil periodically;
do not overll.
Changing Oil
Be sure the engine is not operating and is located on a level
surface before checking or relling oil. Engine should be warm
for easy removal of oil.
1. Detach spark plug wire and move away from spark plug. If
engine uses a battery; disconnect at negative terminal. SEE
FIGURE 8.
2. Remove oil drain plug and empty oil into suitable oil
container. Dispose of oil properly. SEE FIGURE 9.
3. Reinstall drain plug. Remove dipstick (if applicable) or oil ll
cap. SEE FIGURE 9.
4. Fill with appropriate oil to “FULL” or top line of dipstick;
otherwise to top thread of oil ll hole. SEE FIGURE 9.
5. Reinsert dipstick or oil ll cap and tighten.
CAUTION
OIL IS HAZARDOUS WASTE
AVOID INJURY! ENGINE OIL IS HAZARDOUS TO YOUR
HEALTH. DISPOSE OF OIL APPROPRIATELY. USE A
SAFE DISPOSAL/RECYCLING CENTER.
CAUTION
RUNNING ENGINE WITH AN LOW OIL LEVEL WILL
CAUSE DAMAGE TO YOUR ENGINE. THIS TYPE OF
DAMAGE IS NOT COVERED UNDER WARRANTY.
Figure 8: Spark plug location
Figure 9: Filling and changing oil
upper level
lower level
oil ll area/
dipstick
oil drain
plug
spark plug
spark plug
wire

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-514
!
AIR FILTER
Refer to maintenance schedule for suggestions on when to
service your air lter. Clean lter daily in extremely dusty
conditions.
Removing/Installing Air Filter (SEE FIGURE 10).
1. Remove air cleaner cover.
2. Remove the air lter.
3. Replace with clean or new air lter.
4. Replace air lter cover.
Washing Air Filter
1. Wash in warm water with mild soap until dirt and debris are
removed. Press lter when washing, do not twist.
2. Rinse in warm water until soap and dirt are removed.
3. Dry lter by wrapping in a clean cloth and pressing lter until
it is dry.
4. Oil lter thoroughly with any common household lubricating
oil.
5. Attach the lter and air cleaner cover to the engine.
SPARK PLUG
The recommended spark plug is a Torch F6TC.
Checking And Changing Spark Plug
1. Check spark plug every 50 operating hours.
2. Disconnect the spark plug cap, and clean any debris from
around the spark plug area.
3. Remove spark plug and replace if any of the following occur;
pitted electrodes, burned electrodes, cracked porcelain, or
deposits around electrodes.
4. After analysis, seat spark plug and tighten with spark plug
wrench to compress the sealing washer. SEE FIGURE 9 on
previous page.
• Reinstalloriginalsparkplug,tightenadditional1/2turn.
• Installingnewsparkplug,adjustsparkpluggapto.030”
(0.6-0.7 mm) and tighten additional 1/8 – 1/4 turn.
NOTE: Loose spark plug may overheat and damage engine.
Over tightened spark plug may damage threads in the
cylinder head.
WARNING
FUEL IS HIGHLY FLAMMABLE AND MUST BE HANDLED
WITH CARE. NEVER FILL THE TANK WHEN THE ENGINE
IS HOT OR RUNNING. ALWAYS MOVE OUTDOORS TO
FILL FUEL TANK.
CAUTION
NEVER RUN ENGINE WITHOUT AIR FILTER PROPERLY
INSTALLED. ADDED WEAR AND ENGINE FAILURE MAY
OCCUR IF AIR FILTER IS NOT INSTALLED ON ENGINE.
SEE FIGURE 16.
air cleaner cover
air lter element
air cleaner body
Figure 10
air cleaner support
Spark Plug Maintenance
Spark plug should be removed, cleaned and gap adjusted after
approximately fty hours of operating time.
NOTE: A sand blaster should not be used to clean spark
plugs. Microscopic particles remaining in the plug may
score the engine cylinder during operation. Use solvent
and a wire brush to clean the plug and compressed air to
blow out completely.

Operator’s Manual
Viper® 196cc 4-Cycle Engine
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FUEL FILTER
Cleaning Or Replacing Fuel Filter
1. Disconnect spark plug wire from spark plug. Remove spark
plug.
2. Drain fuel from tank before attempting to clean/replace lter.
3. Remove two nuts holding muer to engine and remove
muer.
4. Remove single tank bolt from fuel tank assembly.
5. Remove two nuts from underside of tank.
6. Gently lift tank o of engine and disconnect the hose clamp.
SEE FIGURE 11 and 12.
7. Remove fuel tank lter by using proper size socket to turn
lter counter clockwise.
8. Filter may be washed with kerosene or similar solvent.
9. If lter is extremely dirty or torn, replace with new lter.
8. Reassemble and ll with clean fresh gasoline. Check for leaks
prior to starting engine.
BATTERY ELECTRIC MODELS ONLY
Viper® Engines use a 12 V 7.0 AH/20HR battery. Never connect
the battery in reverse polarity avoiding a short circuit to the
battery charging system. Always connect the positive (+) battery
cable to the battery terminal before hooking up the negative (-)
battery cable.
Connection
1. Connect positive (+) battery cable to the starter solenoid
terminal.
2. Connect negative (-) battery cable to an engine mounting
bolt, frame bolt, or other procient ground connection.
3. Connect positive (+) battery cable to the positive (+) battery
terminal.
4. Connect negative (-) battery cable to the negative (-) battery
terminal.
5. Coat both terminals and cable ends with grease.
Figure 11
Figure 12
fuel pipe hose clamp
fuel lter
CARBURETOR
• Nevertamperwithfactorysettingofthecarburetor.
• ContactyourserviceproviderorViper®ifadjustmentisneeded.
WARNING
BATTERY MAY EXPLODE
• baTTerymayexplODeifprOperprOceDureis
NOT FOLLOWED, CAUSING SERIOUS HARMTO PEO
PLE NEARBY.
• keep away frOm all sparks, OpeN flames,
AND SMOKING MATERIALS.
CAUTION
BATTERIES MUST BE REMOVED FROM MACHINE AND
STORED IN A WARM LOCATION WHEN AMBIENT TEM
PERATURE FALLS BELOW FREEZING.

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-516
TRANSPORTING ENGINE
1. Shut fuel o by closing fuel shuto valve. Failure to turn fuel
o may cause raw fuel to enter the crank case contaminating
the engine oil and providing insucient lubrication. SEVERE
ENGINE DAMAGE MAY RESULT. SEE FIGURE 13.
2. Never transport engine inside an enclosed space or vehicle.
Fuel or fuel vapors may ignite causing serious injury or death.
3. If fuel is present in the fuel tank remove fuel or transport with
an open vehicle in an upright position.
4. If an enclosed vehicle must be used, remove fuel into an
approved red fuel container. DO NOT siphon by mouth.
5. Run engine or drain to use up the fuel in the carburetor and
fuel tank. Always run engine in a well ventilated area.
6. Wipe away any spilled fuel from engine. Allow to dry.
STEPS FOR LONGTERM STORAGE
30 DAYS OR MORE WITHOUT USE
1. Add fuel stabilizer according to manufacturer’s instructions.
2. Run engine for 10-15 minutes to ensure that the stabilizer
reaches the carburetor.
a) Turn fuel shut o to OFF position and start engine and run
until engine runs itself out of any residual fuel left in carb bowl
and fuel lines. (It is normal for the engine to run two to three
minutes before the fuel is completely out of system.)
3. Remove the remainder of the fuel from the fuel tank into an
approved fuel container.
4. Store engine in its upright position.
5. Remove all debris from engine.
Figure 13: Fuel shut-o valve in the ON position.
WARNING
FAILURE TO FOLLOW MAINTENANCE INFORMATION
CAN CAUSE DEATH OR SERIOUS INJURY.
DO NOT REMOVE FUEL WHILE SMOKING, NEAR OPEN
FLAME, OR OTHER POTENTIAL HAZARDS.
AVOID INJURY! NEVER STORE ENGINE WITH FUEL IN
THE TANK INSIDE A BUILDING. POTENTIAL SPARKS
MAY BE PRESENT CAUSING IGNITION OF FUEL AND
FUEL VAPORS.
WARNING
AVOID INJURY! TO AVOID INJURY OR DEATH, NEVER
SIPHON FUEL BY MOUTH.
AVOID INJURY! CHECK ENGINE OFTEN FOR LOOSE
NUTS AND BOLTS. KEEP THESE ITEMS TIGHTENED.

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 17
SPARE PARTS
Only use approved Viper® spares.
TROUBLESHOOTING AND REPAIR
At Viper®, we build quality and durability into the design of our
products; but no amount of careful design by us, and careful
maintenance by you, can guarantee a repair-free life for your
Viper® Engine. Most repairs will be minor, and easily xed by
following the suggestions in the troubleshooting guide in this
section.
This section will help you pinpoint the causes of common
problems and identify remedies.
For more complicated repairs, you may want to rely on your
retailer, an authorized service center or Viper®. Viper® will make
the necessary repairs if a service center is not available. A parts
breakdown is located toward the end of this manual.
We will always be glad to answer any questions you have, or
help you nd suitable assistance. To order parts or inquire about
warranty, call or e-mail us using the contact information found
in this section.
ORDERING REPLACEMENT PARTS
Parts can be obtained directly from the factory. To order parts
visit www.ardisam.com or call 1-800-345-6007.
For other general questions, you can e-mail us at info@ardisam.
com.
Please include the following information with your order:
1) Part numbers
2) Part description
3) Quantity
4) Model number and serial number
CAUTION
PRACTICE SAFETY AT ALL TIMES. ENGINE MUST BE
TURNED OFF AND ALLOWED TO COOL AND SPARK
PLUG WIRE MUST BE DISCONNECTED BEFORE AT
TEMPTING ANY MAINTENANCE OR REPAIR.

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-518
TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE CAUSE REMEDY/ACTION
Engine will not start 1. Power switch o 1. Flip switch to ON position
2. Fuel valve o 2. Check fuel valve is on
3. Spark plug wire disconnected 3. Connect spark plug wire to spark plug
4. Out of fuel 4. Refuel
5. Spark plug wet, faulty or improperly
gapped
5. Clean, replace or gap spark plug
Electric Start 5. Battery discharged 5. Recharge battery
Engine runs rough, oods during op-
eration
1. Dirty air lter 1. Clean or replace air lter
2. Choke partially engaged 2. Turn o choke
3. Carburetor out of adjustment 3. Call factory
Engine is hard to start 1. Stale fuel 1. Drain old fuel and replace with fresh.
Use fuel stabilizer
2. Spark plug wire loose 2. Make sure spark wire is securely attached
to spark plug
3. Dirty carburetor 3. Clean carburetor, use fuel stabilizer, new
fuel can
Engine misses or lacks power 1. Clogged fuel tank or fuel lter 1. Remove and clean
2. Clogged air lter 2. Clean or replace
3. Improper carburetor adjustment 3. Call factory
4. Spark plug dirty, improper gap, or
wrong type
4. Replace spark plug and adjust gap to
.030”
Engine runs, then quits 1. Fuel cap not venting 1. Replace fuel cap
Contact a service provider if above remedies fail.

Operator’s Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-5 19
PARTS BREAKDOWN
196cc ENGINE MAIN PARTS EXPLOSION
12
11
9
87654
3
2
1
30 29
28
27
23
26
24
22
21
20
19
18
16
13
17
25
14
15
10
32 33
31
34
*Keys 9 and 13 not sold separately. Only as part of kit.
Air Filter Kit* (9a) Part Number: 913156
*
*
Carburetor Kit (38) Part Number: 10044
8 4
6
Carburetor Gasket Kit
Engine Gasket Kit
Governor Spring Kit

Operator's Manual
Viper® 196cc 4-Cycle Engine
Check for parts online at www.getearthquake.com or call 800-345-6007 M-F 8-520
196CC ENGINE MAIN PARTS LIST
REF
NO.
PART
NO. DESCRIPTION QT Y.
1 913418 FUEL CAP 1
2 913419
913791
FUEL TANK 31320/31320E
FUEL TANK 31330 “L” SHAPED
1
3 913424 MUFFLER ASSEMBLY 1
4 913380 GASKET INTAKE 1
5 913381 HEAT SHIELD 1
6 913382 CARBURETOR GASKET 1
7 913407 CARBURETOR 1
8 913393 AIR CLEANER GASKET 1
*9  AIR CLEANER BODY 1
9a 913156 KIT AIR CLEANER FOR 196CCVIPER 1
10 64131 NUT M6 X1.0 HSF GR8.8 ZN 2
*11 913175 AIR CLEANER SUPPORT 1
*12 913174 AIR CLEANER ELEMENT 1
*13  AIR CLEANER COVER 1
14 913446 STARTER ASSEMBLY 1
15 913466 VALVE FUEL SHUTOFF 1
16 913433 BLOWER HOUSING RECOIL 1
17 64274 NUT FLYWHEEL 1
18 913435 ENGINE SWITCH 1
19 64275 STARTER CUP 1
20 913468 FLYWHEEL FAN 1
21 913474 IGNITION COIL 1
22 913332 BREATHER TUBE 1
REF
NO. PART NO. DESCRIPTION Q T Y.
23 64183 OIL SEAL MAG 1
24 64157 WASHER 1
25 64156 OIL PLUG 1
26 913328 DIPSTICK W/SEAL 1
27 913172 SUPPORT TANK 1
28 913465 BACK SPRING SPEED CONTROL 1
29 913420 FUEL TANK SHOCK PAD 2
30 913412 CONNECTOR FUEL FILTER 1
31 913514 GOV SPRING KIT 1
32 913177 ENGINE GASKET KIT 1
33 913176 CARB. GASKET KIT 1
34 913329
913794
OIL SEAL PTO 31320/31320E
OIL SEAL PTO 31330
1
35 31320 MANUAL START ENGINECOMPLETE
NOT SHOWN
1
36 31320E ELECTRIC START ENGINECOMPLETE
NOT SHOWN
1
37 31330 MANUAL START ENGINECOMPLETE,
WITH“L” SHAPED TANK NOT SHOWN
1
38 10044** KIT CARBURETOR 1
All weights, specications and features are approximate and are subject
to change without notice. Due to continuous product improvements,
product images may not be exact items.
*Keys 9, 11, 12, and 13 are available as an air lter kit, part number
913156. Keys 9 and 13 are only available as part of the kit. Keys 11 and
12 can also be purchased separately. ** Carburetor kit (P/N 10044) includes intake gasket (4), heat shield
(5), carburetor gasket (6), carburetor (7), and air cleaner gasket (8).