YARDMAX 154FS-1 User manual

SaveThisManual forFutureReference
GasolineEngine
Operator’sManual
MODELNUMBER
154FS-1
SERIALNUMBER
PURCHASE DATE
Bothmodelnumberandserial
numbermaybe foundon the
mainlabel.Youshouldrecord
bothoftheminasafeplacefor
futureuse.
FOR YOUR SAFETY
READANDUNDERSTANDTHEENTIREMANUALBEFOREOPERATINGMACHINE
TametheGreatOutdoors®

Introduction 1
6SHFLĆFDWLRQV 3
Safety 3
KnowYourEngine 4
Controls 5
CheckbeforeOperation 6
Operation 7
Maintenance 9
Storage 12
Technical& ConsumerInformation 13
WiringDiagram 14
TABLE OF CONTENTS
Your new YARDMAX®engine offers quality construction
that is easy and safe to operate. With proper use and
care, it is designed to give you many years of dependable
service.
Prepare to experience the durability to take on any job
with the ease, portability, and convenience of your new
engine!
Discover theYARDMAXAdvantage
At YARDMAX, we understand that land ownership
definitely has its privileges, but it also comes with a
great deal of responsibility. When duty calls and you
need to respond, will you have what it takes to tame the
greatoutdoors?
Whenlookingforoutdoorpowerequipment(OPE)toget
the job done right, at the right price, YARDMAX delivers
the perfect combination of performance and practicality.
YARDMAXhas asolution that’sright foryou.
MAX Performance, MAX Value, MAX Support —
that’sYARDMAX
Backedbydecadesofprovenmanufacturingexpertise
Enhanceddesignfeaturescomestandard
Engineeredforthebestuserexperience
Qualitymetalpartsareusedinsteadofplastic
Arobustwarrantysupportsallproducts
Budget-friendlypricesmakeitpractical
Upforthejob?YARDMAXis.
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Introduction

Carefully read through this entire operator’s manual
before using your new engine. Pay attention to all
cautionsandwarnings.
ENGINESERIAL NUMBER
DISCLAIMER
YARDMAX reserves the right to discontinue, change,
and improve its products at any time without notice
or obligation to the purchaser. The descriptions and
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printing. Equipment described within this manual may be
optional.Someillustrations maynotbeapplicabletoyour
unit.
ENVIRONMENTAL
Recycle unwanted materials instead of disposing of
themaswaste.Alltools,hoses,andpackaging should
be taken to the local recycling center and disposed of
inanenvironmentallysafe way.
Recordtheengineserialnumberonthefrontcoverofthis
manual. You will need this serial number when ordering
parts,andwhenmakingtechnicalorwarrantyinquires.
ENGINETYPE
SERIALNUMBER
DISCLAIMER
Keep this owner's manual handy, so you can refer to it at
anytime.
This owner's manual is considered a permanent part of
theengineandshouldremainwiththeengineifresold.
The information and specifications included in this
publication were in effect at the time of approval for
printing.
READ THIS OWNER’S MANUAL CAREFULLY. Pay special
attentiontothesesymbolsandanyinstructionsthatfollow:
Warning!
Indicates serious injury or death will result if
instructionsarenotfollowed.
Danger!
Indicates a strong possibility that serious injury or
deathcouldresultifinstructions arenot followed.
Caution!
Indicatesa possibility that minor injury or an resultif
instructionsarenotfollowed.
Notice:
Indicates that equipment or property damage can
resultifinstructionsare notfollowed.
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Operator’sManual
Introduction
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* The power rating of the engine indicated in this document is the net power output tested on a production engine for the engine model
and measured in accordance with SAE J1349 at 3,600 rpm (Net Power) and at 3,800 rpm (Max. Net Torque). Mass production engines
mayvary fromthisvalue.
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oftheengine inapplication,environmentalconditions,maintenance,andothervariables.
SPECIFICATIONS
Model 154FS-1
Type 0.028" ~0.031"
Ratedpower
(kW/3600rpm)* 1.65Kw/3600rpm
0D[WRUTXH1ïPUSP 4.5N.m/3800rpm
Fuelconsumptionratio
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6SHHGćXFWXDWLQJUDWLR Ă
1RLVHĂG%$ 70
Bore×Stroke(mm) 54×38
Displacement(cc) 87
Compressionratio 8.5:1
Lubricatingmode Splash
Staringmode Recoilstart
Rotation Anti-clockwise
(fromP.T.O.Side)
Valveclearance(mm) Intakevalve 0.10-0.15
Exhaustvalve 0.15-0.20
Sparkpluggap(mm) 0.7~0.8
Ignitionmode Transistorizedmagnetoignition
Aircleaner noelement
Dimension
(mm)
Length 344
Width 316
Height 327
Netweight(kg) 12.5
SUPPORT
HavequestionsaboutyourYARDMAXequipment?
Callusat844-YARDMAX, emailus at
[email protected], or contact us via your
favoritesocialmediasite.
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SAFETY
SYMBOLS
Theratingplate on yourmachinemayshowsymbols.Theserepresentimportantinformationabouttheproductorinstructionsonitsuse.
Readtheseinstructionscarefully.
Weareyeprotection.
Wearhearingprotection.
Wearsafetyfootwear.
Do not remove or tamper with the
protectionandsafetydevices.
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Donottouchpartswhich arehotfrom
operation.Seriousburnsmayresult.
Stop engine, remove key, read manual
beforemakinganyrepairsoradjustments.
IMPORTANTSAFETYINFORMATION
Most accidents with engines can be prevented if you follow all
instructions in this manual and on the engine. Some of the most
common hazards are discussed below, along with the best way to
protectyourselfandothers.
OWNERRESPONSIBILITIES
Theenginesaredesignedtogivesafeanddependableserviceif
operated according to instructions. Read and understand this
owner’s manual before operating the engine. Failure to do so
couldresultin personalinjuryorequipmentdamage.
Know how to stop the engine quickly, and understand the
operation of all controls. Never permit anyone to operate the
enginewithoutproper instructions.
Donotallowchildrentooperatetheengine.Keepchildrenand
petsfarawayfromthe areaofoperation.
OPERATORSAFETY
SafetyMeasures
START/STOPSAFETY
StartingTheEngine
Warning!
Wash hands after using the machine, refueling, and
FKDQJLQJćXLGV Certain components in this product
anditsaccessories containchemicalsknowntocause
cancer, birth defects, or other reproductive harm
accordingtotheStateof California.
Warning!
Kick back or rapid retraction of the recoil cord will
pull the operators hand and arm towards the engine
quickerthanyoucan letgo.
Warning!
$OZD\VUXQ\RXUHQJLQHRXWGRRUV Exhaust from the
engine contains fumes known to cause cancer, birth
defects, or other reproductive harm according to the
StateofCalifornia.
Warning!
YARDMAX engines are not engineered or intended to
be used to power any other device than what it was
originally specified in. Including but not limited to
competitive racing events, recreational, sport or all-
terrainvehicles(ATV’s),go-karts,fun-karts,golf-carts,etc.
AvoidingKick Back
Lightlypulltherecoilhandle so thatthecordistaughtprior to
pullingharderto start.
Gripthestarterhandlesoyoucanquicklyreleaseitifneeded.
Ifgrippedtoo tightlyinjurycouldresult. 4
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Primingpump
OilDipstick
ChokeControl
AirBox
IgnitionSwitch
OilDrainPlug
CylinderHeadCover
SparkPlug
FuelShutoff Valve
StarterGrip
ThrottleControl
FuelTank
FuelFiller Cap
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FEATURESANDCONTROLS
KNOWYOURENGINE
FUELSAFETY
Warning!
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explosive. Fire or explosion can cause severe burns or
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lights, heat sources, or any other ignition sources. If
fuel spills, wait for it to completely evaporate before
startingtheengine.
HOT EXHAUST
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for a while after stopping the engine. Be careful not to touch the
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When the rope is taught with resistance pull quickly and
smoothlytoavoidkickback. 7R SUHYHQW ĆUH KD]DUGV DQG WR SURYLGH DGHTXDWH YHQWLODWLRQ IRU
stationary equipmentapplications, keep theengine atleast3 feet
(1 meter) away from building walls and other equipment during
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CARBONMONOXIDE HAZARD
Exhaust gas contains poisonous carbon monoxide. Avoid
inhalationofexhaustgas. Never run the engine in a closed garage
RUFRQĆQHGDUHD
OTHER EQUIPMENT
Review the instructions provided with the equipment powered
by this engine for any additional safety precautions that should
be observed in conjunction with engine startup, shutdown,
operation, or protective apparel that may be needed to operate
theequipment.
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5

CONTROLS
The engine switch enables and
disablestheignition system.
The engine switch key must put in
fortheengine torun.
Pulling out the engine switch key
willstopthe engine.
The choke lever opens and closes
thechokevalveinthecarburetor.
Pullingthestarter griptocranktheengine.
The CLOSE position enriches the fuel mixture for starting a cold
engine.
The OPEN position provides the correct fuel mixture for
operationafter starting,andfor restartingawarmengine.
Some engine applications use a remotely-mounted choke control
rather than the engine-mounted choke lever shown here. (See
Figure2)
ENGINESWITCH CHOKELEVER
RECOILSTARTERGRIP
Figure1a
Figure1b
Figure2
IN-ON
OUT-OFF
EngineSwitch
OPEN
CLOSED
OPEN
CLOSED
Caution!
Don’t let the lever suddenly rebound, lightly put the
leverback.
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Operator’sManual

Figure3
RECOILSTART
StarterGrip
Figure4
The Priming Pump supplies more
fueltothecarburetorwhenstarting
theengineinthelowtemperature.
When you put the Priming Pump, you should not put more than
threetimes.
PRIMINGPUMP Notice:
Engines applied in snow blowers, are suggested
using between -22º F (-30º C) to 40º F (4.4º C). If
it operates below or above this temperature scope,
enginescouldn'tstartorworknormally.
Notice:
Your engine is shipped from YARDMAX without the
oil.Addoil pertheinstructionsbeforestarting.
For your safety, and to maximize the service life of your
equipment,itisveryimportanttotakeafew momentsbeforeyou
operate the engine to check its condition. Be sure to take care
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beforeyouoperatethe engine.
Before beginning your preoperation checks, be sure the engine is
levelandtheenginekeyhasbeenremoved.
1. ChecktheGeneral Conditionofthe Engine
Look around and underneath the engine for signs of oil or
gasolineleaks.
Remove any excessive dirt or debris, especially around the
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Lookfor signsofdamage.
Checkthatallshieldsandcoversareinplace,andallnuts,bolts,
andscrewsare tightened.
2. CheckOil
1) Removetheoildipstickand cleanoffwith atowel.
2) Re-insert the oil dipstick and check the oil level without
screwingitdown.
3) Iftheoilistoolow,addenoughoiltoreachthehighareaof
thesafelimits zone.
4) Reinstallandtighten oildipstickbackontheengine.
CHECKBEFOREOPERATION
ISYOURENGINEREADYTOGO?
Warning!
Improperly maintaining this engine, or failing to
correct a problem before operation, could cause a
malfunctioninwhich youcouldbeseriouslyinjured.
Warning!
Always perform a preoperation inspection before
eachoperation,andcorrectanyproblem.
Caution!
Alwayscheckthe engineoilonalevelsurface.
CHECKBEFOREOPERATION
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Controls

Figure5
Figure6
3. CheckbeforeOperation
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equipped)areclean andsecuredinplace.
If the spark plug is unplugged or removed do not crank the
engine.
CHECKFUEL
Turn engine off, open the fuel cap and check the fuel level. If the
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completely, takethefuelcapand tightenthefuelcapclockwise.
Refuel in a well-ventilated area before starting the engine. If the
enginehasbeenrunning,allowittocool. Refuel carefully to avoid
spilling fuel. Don’t add the fuel over the shoulder of the Fuel Tank
(maximumfuellevel).
Review the instructions provided with the equipment powered
by this engine for any precautions and procedures that should be
followedbeforeengine startup.
Only use unleaded gasoline with an octane rating over 90. This
will help eliminate carbon deposits and extended the service life
oftheengine.Donotusegasolinemixed with oil or contaminated
withdirtor water.
CHECKTHEEQUIPMENT POWEREDBYTHISENGINE
Notice:
Running the engine with a low oil level can cause
engine damage, so always check the engine oil level
beforestartup.
OilDipstick LowerLimit
UpperLimit
Fuel tankvolume:1.4L
Maximumfueloil level
Never refuel the engine inside a building where gasoline fumes
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pilotlights,barbecues, electricappliances,powertools,etc.
Spilled fuel is not only a fire hazard, it causes environmental
damage.Wipeup spillsimmediately.
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Before operating the engine for the first time, please review
the IMPORTANT SAFETY INFORMATION and the chapter titled
BEFOREOPERATION.
2. Tostartacoldengine,movethe
choke lever to the “CLOSED”
position. To start a warm
engine, turn the choke lever to
the“OPEN"position.
SAFEOPERATINGPRECAUTIONS
STARTINGTHEENGINE
Warning!
Carbonmonoxidegasistoxic.Breathingitcancause
unconsciousnessordeath.Avoidanyareas oractions
thatexposeyouto carbonmonoxide.
EngineSwitch
OPEN
CLOSED
1. Put the engine switch in the
keyhole.
Figure7a
OPERATION
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