Saito FG-41TS User manual

Φ32mmx2 25.4mmx2 40.9cc
18”x10”~20”x8”
・Filterwithweight[G36-154]・DurabletubeforGasoline(1m)[G36-155]
・Aluminumspinnernut[120S-30]・Tappetadjustingkit[30S-161]・Digitaltachometer[G17-167]
Bore
Mainbody:1,350g/Muffler:100g/Ignition:150g
Stroke Disp.
Weight(Approx.） Practicalspeed Approx.1,300-8,000rpm Maxonground Approx.6,600-8,000rpm
Propeller SP-2orSP-1Plug
Optionalparts
Standard
accessories
Gasoline30㏄classApplications
Batteryforignitionsystem Voltage:6-12V,greaterthan1,000mA※
・Limitgauge(0.1t)fortappetadjustment 1pc ・Wrenchfortappetadjustinglocknut 1pc ・Hexagonalwrench1pc
・Sparkplug[SP-2](Attachedtotheengine) 2pcs ・Plugwrench   1pc ・Mufflerset 1set
・Ignitionsystem（w/sensor）   1set ・Standoffmount   1set ・Anti-looseningnut1pc
Specifications
FG-41TSInstructionManual
1.Fuel
●Thefuelisa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・ENEOSRACINGSPECPRO-2T(SAITOSTANDARD)etc.
Ifsuchoilsarenotavailableinyourcountry,thenpleaseasktheofficialSAITOdistributorinyourcountryforanalternative.
●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.
2.Ignition
●Placethemainunitasfarfromotherelectricaldevicesaspossible.
●PlacethetwoswitchesoftheignitionandtheRCreceiverasfarfrom
eachotheraspossible.
(1)Plugcord(meshedhightensioncord)
2cordscompatibleforleft/rightcylinder.Insertthecapdeeplyontothe
plugtomakesureitwillnot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.(6-12V,morethan
1000mAisrecommended.).Betweenthebatteryandmainunit,make
suretoinstallaheavydutyswitchwhosecapacityishigherthan3A.
(4)Tachometercord(optional)
Connectthedigitaltachometer(Option).Otherwisetheconnectoris
normallyvacant.
Plugcap
Switch(morethan3A)
Sensor
(2)Sensorcord
(1)Plugcord Mainunit
(3)Battery
cord
(4)Tachometercord
Recommendedbattery
Voltage:6-12V
Capacity:1,000mA~
ver.June,2022
4.Break-inMOSTIMPORTANT!!
●Beforestartingtheengine,injectasuitableamount(approx.20〜30cc)ofengineoilintothelubrica-
tionnippleonthecrankcaseusingasyringeorpumpwhileturningthepropellerbyhand.Afterthat,
plugthisnipple.Asexcessisdischargedfromthebreathernipple,attachatubetothebreathernipple.
●Prop-recommendation:Mejzlik19”x8”
●Use15:1fuel:oilratioforbreak-in
●NevermakethefuelmixtureleanduringBreak-in.Itcouldcauseseizureevenduringidlingorlow
speedrunning.
●Beforestartingtheengine,openthemainneedleApprox.1.5~2turnsopen(CCW)fromfullyclosed.
●Starttheengine(usingastarterisrecommendedforsafety).
●Soonafterstarting,ContinuetoturnthemainneedleCCWtodropRPMsuntiljustbeforeenginestops
keepingthethrottleopenedfully.
●IfopeningmainneedledoesnʼtdropRPM,thenopentheslowneedletoo.
●Runinthisveryrichconditionfor1literoffuel.
●Now“initial”break-inisdone.
3.Propeller
●TheStandardpropisMejzlik20”x8”whichbringsapprox.7,000rpm(orFalcon20”x8”bringsapprox.6,600rpm）.Largersizeorgreaterpitch
cancauseenginebrokenduetooverload.
●Accordingtotheplane,useareliablepropwhichbrings6,600~8,000rpmmaxatground.
●Useawell-balancedone.Neverusethepropellerthathasbeenscratchedordamagedevenifslightly.
●Asthepropelleriscompressedslightly,tightenthepropellernuteveryhourofoperation.
Throttle
Fullopen
CCWtomake
rich
Main
Needle
⊖
Slowneedle
（Adjustby screwdriver）
CW→Lean
CCW→Rich
Slow High
Throttlelever
CW→Lean
CCW→Rich
Mainneedle
CW→Lean
CCW→Rich
5.Adjustmentofcarburetorafterinitialbreak-in.
◇Needlereferenceposition(Setafterinitialbreak-in)
●Starttheengineafteradjustingtheneedletothefollowing
referencevalue.
●Mainneedle：Approx.1.5-2turnCCWfromfullyclosed
●Slowneedle：Approx.3.5~4turnsCCWfromfullyclosed(Then
throttlevalveshouldbefullyclosed)
●Actually,thebestpositionoftheneedlesvarydependingonthe
prop,temperature,humidityandsoon.Pleaseadjustasnecessary
afterobservingtheengineperformanceduringflight.
◇Peakadjustment
●Afterstartingtheengine,warmupforapprox.30secondsatlowspeed.
●Achievethepeakatfullthrottle.
→TurnthemainneedleCWgraduallytothepositionwheretheRPMisgreatest(thepeak).ContinuingtoturntheneedleCWpastthe
peakcouldleadtoseizuresoturnitslowlyandcarefully.IftheRPMsuddenlydecreasesafterpassingthepeak,instantlyturnthemain
needleCCWtoagainincreasetheRPM.Otherwiseitcoulddamagetheengineseriously.
●OnceachievingpeakRPM,returnthethrottletolowspeed.Makeanoteofthepositionofmainneedleatthepeakatthattime.
(HowmanyturnsyoudidCWbasedonthereferencevalue.)
◇SlowneedleAdjustment
●Afterstartingtheengine,achievethepeakRPMreferringtotheprocedureabove.DONOTmovethemainneedlefromthepeakposition
atthisstage.
●AfterachievingpeakRPM,nextisslowneedleadjustment.OpenthethrottlefromlowRPMtofullthrottlequickly.
●IftheenginehesitatesforamomentorstallsbeforetheenginereachesmaxRPM,Itʼsbecausethemixtureistoolean.Thenturntheslow
needleCCWslightly.
●IftheengineisslowtoreachpeakRPM(fullthrottleset),itʼsbecausethemixtureistoorich.ThenturntheslowneedleCWslightly.
●AdjusttheslowneedleasaboveuntiltheRPMfollowsthethrottlemovementsmoothly.Theimportantpointistoadjusttheslowneedle
AFTERthemainneedlehasbeenadjustedtoitspeak.
●Nowbreak-inatgroundlevelisdone.Adjusttappetsbythemethoddescribedlater.
◇Pre-flight/Flightadjustment
●Whentheslowneedleadjustmentisdone,checktheresponsebyrevvingupfromlowspeedtofullthrottlequicklyseveraltimes.
●OpenthethrottlefullyandturnthemainneedleCCWapprox.60〜90degreesfromthepeakposition.Thisistomakethefuelmixture
richerintheairwheretheRPMgethigherthanontheground.
●Afteralladjustmentsaremade,flyyouraircraftandfinetunetheengineaccordingtothesituation.Basicallytuningshouldbedonewith
themainneedle.Readjustmentoftheslowneedleisrarelyneededifthefirstadjustmentoftheslowneedlehasbeendonesuccessfully.
6.Tappetadjustment
Thevalveclearanceshouldbecheckedandadjustedafterbreak-inandeverytimeaftertwohourswhiletheengineiscold.Beforeadjusting
tappetgaps,tighten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hexagonalwrench
untilyougetthecorrectgap
(belowpic)forbothofintake&
exhaust.
3.Oncethegapisset,tightenthelock
nutandattachtheplugandcovers.
Dothesameadjustmentforthe
anothercylinderinorder.
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slightlyandwilllose
compression.Thenadjustagain.
CorrectGap
Mustnotbeinserted
Closeto“0”aspossible
Limitgauge
(0.1mm)
TopDeadCenter
（Thestatebothvalvesareclosed) Loosenthelocknut Adjustthegapturning thesetscrew
Tightenthelocknut
tofixthesetscrew
Notes:
●Bundletheflexiblemufflerswithwires,andtakesomemeasuretoreleasevibrationfromtheflexiblemufflerssuchasfixingthemtothe
airframe.Leavingthemufflersfreereduceslifeoftheflexiblemufflersrapidlyandmakesiteasiertobreakbyvibration.
●Asitusesoil-mixedfuel,theplanemaysometimesgetdirtyfromtheexhaust.
●Useareliableandwell-balancedprop.Otherwiseitmaycauseanabnormalvibrationandcouldresultinaseriousaccident.
●●Duringoperation,allenginescrewscanloosenduetometalheatexpansion.Checkandtightenoccasionallyespeciallypropnut,
exhaustnuts,andcylinderscrews.
●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.Applylubricanttoallowthevalvespringsreturnsmoothly.Youcancheckit
byyourfingers.
●Payattentiontothesurroundingssoasnottodisturbothersbynoiseandexhaust.
●Alwayskeepspectatorsbehindtheenginewhenoperatingtheengine.
●Asexhaustsmokeisharmful,becarefulnottobreatheinorotherwiseexposeyourselftoitsharmfuleffects.
●Payattentionnottotouchtherotatingpropellerwhenstartingengine,andmovetorearsideoftheaircraftoncetheengineisstarted.
●Allresponsibilitiesfortheuseoftheengine,andotherobligationsandresponsibilitiesbasedonlaws,regulations,etc.arebornebythe
purchaserandtheuser,andSAITOSEISAKUSHOCO.,LTD.isexemptfromanyresponsibilities.
※IfyouuseaLi-Po,werecommendthespeclessthan2,500mAcapacity
andlessthan30Cdischargerate
Firewall
Standoffmount
Fuelsupplytocarburetor
Fuelfillerline
Ventline
Gasoline-compatibletubing
Setthecenterofthecarb
slightlyabovethefuellevel
Closeaspossible
Fueltank
Gasoline-compatible
tankstopper
Filterwithweight
Fuel
Level
ToOutsideoftheplane
Ventline

No.
01
02
06
07
08
09
10
13
14
15
17
19
20
21
22
23
27
28
31
32
33-1
33-2
34
35
36
37
38
39
40
41
42
Item
Cylinder (Left)
Cylinder (Right)
Piston
Piston pin
Piston pin retainer
Piston ring
Connectin rod (Conrod)
Conrod screw
Cylinder screw set
14-1,-3,-4
Crank case
Rearcover mount
Breather nipple
Front bearing
Main bearing
Rear bearing
Crank shaft
Taper collet & Drive flange
27-1,-2
Prop washer & nut
28-1,-2
Crank case screw set
31-1,-2,-3,-4
Engine gasket set
32-1,-2,-3,-4,-5,-8
Cam gear housing (Left)
Cam gear housing (Right)
Cam gear (Left)
Cam gear (Right)
Cam gear shaft
Steel washer set
Tappet (Valve lifter)
Push rod
Push rod cover & rubber seal
40-1,-2,-3
Rocker arm
Rocker arm screw & nut
42-1,-2
Qty
1
1
2
2
4
2
2
4
2set
1
1
1
1
1
1
1
1set
1set
1set
1set
1
1
1
1
2
2set
4
4
2set
4
2set
No.
43
46
47
48
49
69
78
82-1
83-1
85
88
89
95
110
120
149
152
153
160
164
175
Item
Rocker arm pin
Valve set (Intake & Exhaust)
46-1,-2
Valve spring & Keeper & Retainer
47-1,-2,48
Cotter (Valve spring retainer lock)
Rocker arm cover
Intake pipe
Flexible muffler
78-1,78-6
Carburetor complete
82-1-1,-1-2,-1-3,-1-4,-1-5,-1-7,-1-8,-1-9,-1-13,
-1-14,-1-15,-1-16,-1-17,-1-18,-1-19,-1-20,
-1-21,-1-22,-1-23,-1-24,-1-25,-1-26,-1-27,-1-28,
-1-31,-1-34,-1-40,85,88,89,91-1,131
Carburetor body assembly
82-1-1,-1-2,-1-3,-1-4,-1-7,-1-8,-1-13,-1-14,-1-15
-1-27,-1-28,-1-31
Main needle
Throttle lever
Slow needle
Engine mount set
95-2,-3,-4,-5
Anti loosening nut
Spark plug (SP-2)
Oil slinger
Screw-pin
Electronic ignition system
3-1,-2,-3,-4
Pump assembly
82-1-17,-1-18,-1-19,-1-20,-1-21,-1-22,-1-23,
-1-24,-1-25,-1-26
Inlet manifold assembly
164-1,-2
Initial lube nipple
Qty
4
2set
2set
4
4
2
1set
1set
１set
1
1
1
1set
1set
2
1
1
1set
1set
1set
1
153
-1
153
-2
153
-3
153
-4
153
82-
1-31
82-
1-7 82- 1-27 82- 1-8 82- 1-1 82- 1-14 82- 1-3 82- 1-4 82- 1-34
82-
1-15
82-
1-28
82-
1-13
82-
1-37
82-
1-37
82-
1-9
82-
1-5
82-
1-16
82-
1-2
91-1
88B
131
89
85
82-
1-17 82- 1-18 82- 1-24 82- 1-19 82- 1-25 82- 1-20 82- 1-24 82- 1-21 82- 1-25 82- 1-22 82- 1-23 82- 1-26
82-1
78-1
78-6
78
69
22
14-4
32-3
95-2 95-4
95-3
32-4 164
-1
32-5
31-3
17
82-
1-40
0141
48
49
43
02
120
0609 1008 13
31-1 31-227-2 27-1110
120
28-2 28-1
21
20 23 36 34
34
37
38
39
19
15175
14-3
14-1
32-1 33-1
33-2
32-2
32-8
40-1
40-3
40-2
07
42-1
42-2 46-147-147-2
46-2
149
38.5
215
45 160
120
78.9
90.5
55.5
43.9
40
45
65
E.C.
E.C.
Warranty:
●Ifthereisanydeficiencyfromthefactoryconcerningmanufacture,pleaseconsultwiththeshopordistributoryouboughtfrom.Our
companywillberesponsibleforrepair.However,anyfailureortroublecausedbyunnecessarydisassembly,modification,orotheruses
thanthoseprovidedintheinstructionmanualisnotsubjecttowarranty.
●Ignitionsystemissubjecttothewarrantyonlyforinitialfailure.Oncethesystemhasbeenactivatedsuccessfully,itwillnolongerbe
subjecttowarranty. Allspecificationsandmodelsaresubjecttochangewithoutnotice.
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

フレキシブルマフラーは針金で束ね、機体に固定する等、フレキ自体から
振動を逃す工夫をして下さい。ぶら下げたままにして使用すると、エンジ
ンの振動により寿命を著しく短くし、フレキ部分が割れ易くなります。
Bundletheflexiblemufflerswithwires,andtakesomemeasureto
releasevibrationfromtheflexiblemufflerssuchasfixingthemto
theairframe.Leavingthemufflersfreereduceslifeoftheflexible
mufflersrapidlyandmakesiteasiertobreakbyvibration.
機体に固定等
ぶら下げたままにしない
Fixtotheairframeetc.
Donotleaveitfree
針金で束ねる
Bundlebywires