Saito FG-19R3 User manual

1.Fuel
●Thefuelisamixtureofregulargasolineorhigh-octanegasolineandhigh-quality2-strokeengineoil.
●[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. 
NEVERuse“cheapoil”designedforutilityenginesforbrushcutter,lawnmower,orchainsaw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).
●Duringthebreak-inprocess,use15:1mixedfueltoensurethebestlubricationforinitialrunning.
●Anydamagecausedbythefuelused,inwhichtheoilratioislowerthan20:1willnotbecoveredbywarranty.
●Donotusegasolinecontainingethanol.Itmaycausenotonlypowerlossbutalsocorrosioninsidetheengine.
FuelTank
FuelLevel
ToOutsideoftheplane
Ventline
Fuelsupplytocarburetor
Fuelfillerline
Ventline
Gasoline-compatible
tankstopper
Gasoline-compatibletubing
Filterwithweight
Setthecenterofthecarb
slightlyabovethefuellevel
Closeaspossible
Hollowout
3.Propeller
●RecommendedpropellerisAPC14x6.
●Useareliablepropwhichbringsmaximum9,000~10,000rpminconformitytoyourplane.
●Useawell-balancedprop.Neveruseapropthathasbeenscratchedordamagedevenifslightly.
●Neveruseexcessivelylightorheavyloadedprop.Theymaycauseenginefailure,bigaccident,oreveninjury.
●Asthepropelleriscompressedslightly,tightenthepropellernuteveryhourofoperation.
4.Break-inMOSTIMPORTANT!!
●Beforestartingtheengine,injectasuitableamount(approx.20〜30cc)ofengineoilintothe
lubrication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:APC14x6.
●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+1/2turnsfromfullyclosed.
Throttle
Fullopen
CCWtomake
rich
Main
Needle
CW→Lean
CCW→Rich
CW→Lean
CCW→Rich
CCW→Rich
CW→Lean
Mainneedle Slow(Idle)Needle
(Adjustwith⊖screwdriver)
Slow
High
Throttlelever
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turnCCWfromfullyclosed
●Slowneedle：Approx.7~8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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.
CorrectGap
Mustnotbeinserted
Closeto“0”withnolimit
Limitgauge
(0.1mm)
Loosenthelocknut
Adjustthegapturning
thesetscrew
TopDeadCenter
（Thestatebothvalvesareclosed) Tightenthelocknut
tofixthesetscrew
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#1
cylinder.Thenturntheprop
CCWbyhandtoplacethe
pistonatTDCofcompres-
sionstroke.
2.Loosenthelocknutand
adjustthegapbyhexago-
nal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#3-#2
cylinders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.
Note:
●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.
●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.
●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.
・Filterwithweight[G36-154]・Rubbertubeforgasoline(1m)[G36-155]
・Aluminumspinnernut[50-30]・Tappetadjustingkit[30-161]・Digitaltachometer[G17-167]
Ø22.4mm 16.2mm 19.18cc
APCD13”xP9”~D15”xP6”
Bore
Body:950g/Mufflers:60g/Ignitionsystem:195g
Stroke Disp.
Weight(Approx.） RPMRange Approx.1,800-10,000rpm Maxonground Approx.9,000-10,000rpm
Propeller 1/4-32sparkplug
SP-1
Plug
Optionalparts
Glow2st60/4st90classApplications
Batteryforignitionsystem Voltage:6-12V,greaterthan1,500mA
Specifications
FG-19R3InstructionManual
Standard
accessories
ver.June,2021
・Limitgauge(0.1t)fortappetadjustment 1pc ・Plugwrench  1pc
・Wrenchfortappetadjustinglocknut 1pc ・Hexagonalwrench1.5mm 1pc
・Sparkplug[SP-1](Attachedtotheengine) 3pcs ・Mufflerset  1set
・Ignitionsystem（w/sensor）  1set
※
※IfyouuseaLi-Po,werecommendthespeclessthan2,500mAcapacityand
lessthan30Cdischargerate
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)
Inserttheplugcapof(1)Plugcorddeeplyontotheplugof#1cylinder
tomakesureitwillnotcomeoff.Theothercapsandplugsshouldbe
installedbythesameway.(Refertocylinder#onthereverseside)
(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
1500mA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.
●Starttheengine(usingastarterisrecommendedforsafety).
●Runfor15~20secondsatlowspeedtowarmup.
●Openthrottlegraduallyuptofull.InthemeantimeturnthemainneedleCCW.ContinuetoturnthemainneedleCCWuntiljustbefore
enginestopskeepingthethrottleopenedfully.
●Runinthisveryrichconditionfor1literoffuel.
●Now“initial”break-inisdone.
PlugCap
SwitchCapacity:3A〜
Sensor
(2)Sensorcord
Battery
Voltage:6-12V
Capacity:1,500mA〜:
( 1)PlugCord MainUnit
(3)BatteryCord
(4)TachometerCord

No. Item Qty No. Item Qty
01 Cylinder 3 41 Rocker arm 6
06 Piston 3 Rocker arm screw & Nut
07 Piston pin 3 42-1,-2
08 Piston pin retainer 6 43 Rocker arm pin 6
09 Piston ring 6 46 Valve 6
10 Master rod 1 Valve spring & Keeper & Retainer
11 Linked conrod 2 47-1,-2,-3
Conrod linkpin & E-ring 49 Rocker arm cover 6
12-1L,-2 69 Intake pipe 3
Cylinder screw set Muffler complete
14-1,-2 78-1,-2,-3,-5,-6
15 Crankcase 1 Carburetor complete 1set
17 Rear cover A (Intake manifold) 1 82-1-1,-1-2,-1-3,-1-4,-1-5,-1-7,-1-8,-1-9,-1-13,
18 Rear cover B 1 -1-14,-1-15,-1-16,-1-17,-1-18,-1-19,-1-20,-1-21,
19 Breather nipple 1 -1-22,-1-23,-1-24,-1-25,-1-26,-1-27,-1-28,-1-29,
20 Front ball bearing 1 -1-31,31-6,85,88B,89,90-1,91-1,131
22 Rear ball bearing 1 Main needle
23 Crankshaft 1 85,90-1
Taper collet & Drive flange Throttle lever
27-1,-2 88B,90-1
Prop washer & Nut 89 Slow needle 1
28-1,-2 Engine mount set
Crankcase screw set
31-1,-2,-3,-4,-5,-6
110 Anti loosening nut 1
Engine gasket set
120 Spark plug 3
32-1,-2,-3,-4,-8
33 Cam gear housing 3
131 Throttle valve extension adapter / set screw 1
35 Cam gear 3
152 Screw-pin 1
170 Insulator joint for carburetor 1
175 Initial lube nipple 1
36 Cam gear shaft 3
Electronic ignition system
37 Steel washer set 3set
153-1,-2,-3,-4
38 Tappet 6
Pump assembly
39 Pushrod 6
82-1-17,-1-18,-1-19,-1-20,-1-21,-1-22,-1-23,
Pushrod cover & Rubber seal
-1-24,-1-25,-1-26
40-1,-2,-3
47 6ea.
12 1set
78 1set
82-1 1set
14 3set
85 1
88B 127 1ea.
28 1ea.
31 1set
32 1set
95 1
40 6ea.
153 1set
160 1set
42 6ea.
Muffler right angle adopter / nut140 3
153-3
153-1
153-2
153-4
153
90-1
90-1
90-1
88B
131
82-1
-9
89
82-1
-16
82-1
-5
82-1
-2
82-1
-14 82-1
-3 82-1
-4 85
90-1
82-1
-29
31-6
82-1
-7 82-1
-8
82-1
-27
82-1
-27
82-1
-28
82-1
-13
82-1
-15
82-1
-1
82-1
-31
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
91-1
82-1
168.5
64
2038
58
4-
4.3
60.7 68.7 10 32.5
58.7
20
129.4
M7x1.0
78-1
78-5
78-2
78-3
78-6
01
06
07
08
09
10
11
12-1L
12-2
14-1
14-2
15
17
18
1920A
22
23140
27-1
27-2
28-1
28-2
31-1
31-3
31-4
31-5
32-1
32-2
32-3
32-4
32-8
33
35A
36A
37
38
39
40-1
40-2
40-3
41
42-1
42-2
43
46
47-1
47-2
47-3
49
69
120
152
110
82-1
31-2
95
175
170
CylinderIDnumber
(Viewfromfront)
#1
#2 #3
Firingorder
Propdirection
Firingorder
#1-#3-#2
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.
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
Allspecificationsandmodelsaresubjecttochangewithoutnotice.