Operator's Manual
Viper® 99cc 4-Cycle Engine
8
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OPERaTION
PRE-OPERaTION INSPECTION
1. Check that the engine is equipped with the proper amount
and type of oil. To determine the most appropriate type of
oil to use, see the 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 muffler and recoil starter.
8. Be sure air filter and cylinder fins are clean and free of debris.
9. Check the equipment powered by this engine. Review the
operator’s manual provided 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.
OIL TYPE:
SAE 5W-30
OIL TYPE:
SAE 10W-30
OIL TYPE:
SAE 30
TEMP (F)
-20 0 20 40 60 80 100
TEMP (C)
-30 -20 -10 0 10 20 30
