Saito FG-61TS - User Manual

Note:
●Asitusesoilmixedfuel,planesometimesmaygetdirtybyexhaust.
●Usereliableandwellbalancedprop,otherwiseitcauseabnormalvibrationandmayresultinseriousaccident.
●Duringoperation,thescrewsallovertheenginecanbeloosenbyheatexpansionofmetal.Tightenthemup
occasionally.
●Whentheexhaustvalvegetsdullbycarbonorsludgeespeciallyincoldatmosphere,removetherockercover
andapplysomeanti-rustspraytotheexhaustvalvetohelpthevalvetomovesmoothly.
●Allresponsibilitiesfortheuseoftheengine,andotherobligationsandresponsibilitiesbasedonlaws,regula-
tions,etc.arebornebythepurchaserandtheuser,andSAITOSEISAKUSHOCO.,LTD.isexemptfromany
responsibilities.
Warranty:
●Ifthereisanydeficiencyfromthefactoryconcerningmanufacture,pleaseconsulttheshopordistributoryou
boughtfrom,sothatourcompanywillrepairthemwithresponsibility.Anyfailureortroublecausedbyunnec-
essarydisassembly,modification,orotherusesthanthoseprovidedintheinstructionmanualisnotsubjectto
thewarranty.
Φ37.2mmx2 28mmx2 60.9cc
D21”~23”xP10”xP11
・Filterwithweight[G36-154] ・DurabletubeforGasoline(1m)[G36-155]
・Aluminumspinnernut[57T-30] ・Tappetadjustingkit[120S-161] ・Digitaltachometer[G17-167]
Bore
Mainbody:2,090g/Muffler:100g/Ignition:170g
Stroke Disp.
Weight(Approx.） Practicalspeed
Approx.1,500-7,400rpm Maxonground Approx.6,200-7,400rpm
Propeller CM-6Plug
Optionalparts
Gasoline50㏄classApplications
BatteryforignitionsystemVoltage:6-9V,higherthen1,000mA(2CLipoor5CNiMH)
・Limitgauge(0.1t)fortappetadjustment1pc ・Spannerfortappetadjustinglocknut1pc ・Carburetoradjustmentbar1pc
・Sparkplug[CM-6](Attachedtotheengine)2pcs ・Mufflerset  1set・Chokebar  1pc
・Ignitionsystem（w/sensor） 1set ・Mufflerbracket 1set・Plugwrench  1pc
・Standoffmount1set ・Anti-looseningnut 1pc ・Hexagonalwrench 1set
Specifications
FG-61TSInstructionManual
4.Needlereferenceposition(SetAfterBreak-in)
●Mainneedle：Approx.2.5~3turnsfromfullclose
●Slowneedle：Approx.4~5turnsfromfullclose（Thenthrottleshouldbefullyclosed）
●Actuallythebestconditionoftheneedlevariesdependingontheprop,temperature,humidityandso
on.Pleaseadjustseeingtheengineperformanceduringflight.
5.Tappetadjustment
ThevalveclearanceshouldbecheckedandadjustedafterBreak-inandeveryafter2hourswhilethe
engineiscold.Beforeadjustingtappetgaps,tightenupthescrewsaroundcylindersetc.
1.Removethesparkplug
androckerarmcoversofa
cylinder.Thenturnthe
propCCWbyhandto
placethepistonatTDCof
compressionstroke.
2.Loosenthelocknutand
adjustthegapbyhexago-
nalwrenchuntilyouget
thecorrectgap(Rightpic)
forbothofintake&
exhaust.
3.Oncethegapisset,
tightenthelocknutand
attachtheplugand
covers.Thendothesame
adjustmentfortheother
cylinder.
4.Turnthepropbyhandto
checkifthecompression
isenough.Ifthegapisless
than0,thevalveisalways
openedsightlyandlose
compression.Thenadjust
again.
CorrectGap
Mustnotbeinserted
Closeto“0”withnolimit
Limitgauge
(0.1mm)
2.Ignition
●Ignitionarrangement-Placethemainunitasfarfromotherelectricaldevicesaspossible.
(1)Plugcord（meshedhightensioncord)
2cordscompatibileforleft/rightcylinder.Insertthecaps
deeplyintoplugstomakesuretheywonʼtcomeoff.
(2)Sensorcord
Connectwiththecordfromthesensorattachedtothe
engine.
(3)Batterycord(black/redcord)
Useafullychargedbatterythathasadequatespec.(6-9V,
morethan1000mAisrecommended.).Betweenthebattery
andmainunit,makesuretosetaheavydutyswitchwhose
capacityishigherthan3A.
(4)Tachometercord
Connectthedigitaltachometer(Option).Otherwisethe
connectorisnormallyvacant.
Plugcap
Switch（morethan3A）
Sensor
(2)Sensorcord
(1)Plugcord
Mailunit
(3)Battery
cord
(4)Tachometercord
Recommendedbattery
Voltage:6-9.0V
Capacity:1,000mA~
3.Methodofchoke（Noneedwhenyouusestarter）
●Inadvance,makeathinholeonthecowlingtoinsertthechokebar/
slowneedleadjustmentbar.
●Whenchoke,besuretoturnofftheswitchoftheignitionsystem.
●Asshowninthefig,passthechokebar(withM3.5threadonitstip)
thoroughtheholeonthecowling.Thenturnthebartoinsertintothe
M3.5internalthreadatthecenterofthethrottlelever.
●Pullthechokebarandfixitwithacliporclampwithfullthrottleas
showninthefigsothatitmaynotgobacktothepreviousposition.
●Graspthepropbyhandandturnittotheforwarddirection(CCW)for
severaltimes,untilthecarburetorgenerateshissing-likesound.After
hearingthissoundforabout5times,quicklyflickthepropbycrackingit
some10times.Thenchokingisdone.
●Afterthat,removethechokebar.Afterthat,powerontheignitionsystemandflickthepropquicklytostarttheengine.
Iftheenginedoesnʼtstart,repeatthechokingprocedure.
Cowling
chokebarforinsert
M3.5screw
Throttlelever
Throttlevalve
（Movetotheleft）
Slowneedle
chokebar
Temporaryfixed
byaclip
ForCCW
Makerich
Main
needle
ForCW
Open
Throttle
lever
Slowneedle
CCW
Rich
CW
Lean
Mainneedle
Throttle
lever
1.Fuel
●Thefuelismixtureofcommercialregulargasolineandreliableoilfor2-strokeengines.
●[Exampleofoilrecommendation]
・KlotzKL-200OriginalTechniplate ・DeluxeMaterialsPowerModel2T-Setc.
●Besuretousethemixture“gasoline:oil=15~20:1”byvolumeratio.(Ex.1000mlofgasolineshouldbemixed
withmorethan50mlofoil).
●InBreak-inprocess,use15:1mixedfueltoensurethebestlubricationforinitialrun.
●Anydamagecausedbythefuelused,inwhichtheoilratioislowerthan20:1ratio,isnotwarranted.
●Donotusegasolineethanolmixed.Itmaycausenotonlypowerlossbutalsocorrosioninsidetheengine.
Firewall
Standoffmount
Cutout
Fueltank
Fuel
level
Tooutside
Airinhalationpipe
ToCarbnipple
Fuelfeedingpipe
Airinhalation
pipe
Rubbercapfor
gasoline-resistant
Gasoline-prooftube
Filterwithweight
Setthecanter
ofthecarb
slightlyupperthanfuellevel
Closeaspossible
Standard
accessories
3.Break-inMOSTIMPORTANT!!
●Prop-recommendation:APC-22x10forBreak-in.
●Use15:1oilmixedfuelforBreak-in.
●NevermakethefuelmixtureleanduringBreak-in.
Itcouldcauseseizureevenduringidlingorlowspeedrunning.
●Beforestarttheengine,openthemainneedleApprox.3turns
openfromfullclose.
●Starttheengine(usingastarterisrecommendedforsafe).
●Runforabout10secondsinlowspeedtowarmup.
●Openthrottlegraduallyuptooverhalfopen,inthemeantimeopenthe
mainneedlesometurns.Continuetoopenthemainneedleuntilthe
speeddropandgetsdull,wherethethrottleopenedoverhalf.
●Ifitcannotmakerichbyopeningbymainneedle(rpmdoesnʼtdrop),
thenopenslowneedletoo.
●Runinthisveryrichconditionfor2tanks.
SAITOSEISAKUSHO,CO.,LTD.
www.saito-mfg.com
22-7,3-chome,Tokagi,Ichikawa-shi,Chibaprefecture272-0024,JapanPhone:047-378-4156FAX:047-378-4155
FG-19R3InstructionManual
Allspecificationsandmodelsaresubjecttochangewithoutnotice.

Summary

3. Break-in MOST IMPORTANT!

1. Fuel

2. Ignition

Plug cord

Connects ignition system to spark plug. Ensure secure fit to prevent misfires.

Sensor cord

Connects engine sensor to ignition system. Ensure proper connection for ignition timing.

Battery cord

Connects ignition system to battery. Use specified voltage and capacity for reliable operation.

Tachometer cord

Connects engine to digital tachometer. Used for monitoring engine speed.

3. Method of choke

4. Needle reference position

Main needle

Adjust fuel mixture for idling and low-speed operation. Tune for optimal performance.

Slow needle

Adjust fuel mixture for high-speed operation. Fine-tune for engine performance.

5. Tappet adjustment

Warranty

Saito FG-61TS Specifications

General

Brand	Saito
Model	FG-61TS
Category	Engine
Language	English