Operator's Manual
Viper® 99cc 4-Cycle Engine
12
For additional information email
or call 800-345-6007 M-F 8-5
maINTENaNCE SCHEDUlE
maINTENaNCE ITEm
Every time
of use
First month
or 20 hours
Each season
or 50 hours
Every 6 months
or 100 hours
Each year
or 300 hours
Clean Engine and
Check Bolts and Nuts
X
Engine Oil
Check
X
(See Lubrication section)
Change *
X
X
Air Filter
Check
X
(See Air Filter section)
Clean **
X
Replace
X
Spark Plug (Gap .030”)
Check-Adjust
X
(See Spark Plug section)
Replace
X
Fuel Filter
Clean ***
X
(See Fuel Filter section)
Replace
Valve Clearance
Check-Adjust ***
X
Cylinder Head
Clean ***
X
Fuel Tank
Replace ***
(Every 3 years)
* Perform initial oil change after first 20 hours of operation, then every 50 hours or each season. Oil must be disposed of safely and respon-
sibly. Do not pour into sewage drains, onto a garden/yard or into a water source. Your local zoning or environmental regulations will give
you more detailed instructions on proper disposal techniques.
** Service more frequently under dusty conditions
*** These items should only be performed by a mechanically proficient 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 difficult, or require special tools, are
best handled by professionals and are normally performed by a
technician or other qualified 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 warranty 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.
