Compact Radial Engines MZ201 Instructions for use

INSTRUCTIONANDMAINTENANCEMANUAL
MZ201
We recommend reading this manual before installing or using the engine.
Compact Radial Engines Inc.
#3-8473 124th Street
Surrey, B.C.
Canada. V3W9G4

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CONTENTS PAGE
Presentingthe MZ201 engine 3
Warning 3
Introduction 4
Engine delivery 4
Guarantee 4
Importantsafetytips 5
Technicalspecifications 6
Performance Diagram 7
Main torque settings 7
Oil and Fuel 8
Ground checkto be carried outbefore startingup the engine forthe first time 9
Startingup the engine forthe first time and runningin 10
Finalcheck 11
Start up procedure 11
Adjustingthe carburettor 12
The reducer13
Trouble-shooting 15
Wiringdiagram18
Maintenance schedule 19
Exploded viewofthe MZ201 20
Listofspare parts 21
Preliminaryflightinspection 22
Engine repairslogbook 23
Modificationsordifferentmountings
compared to originalmodel Date

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PRESENTING THEMZ201 ENGINE
Congratulationson havingchosen the MZ201 engine. The specialdesignofthe variouscomponentsmakes
thisa particularlylight-weight, sturdyand reliable model.
Ifit isinstalled correctlyand serviced regularly,yourengine will lastforalongtimeand meetyour
requirementsin full.
Avant-garde technology wasemployed tomanufacturethisengine which isunique initskind. The light
alloycylinderhasbeen treated withNikasil and islight-weight,reliableand hasavirtuallyendless life-span.
The crankshaft ismade ofnickel-chrome-molybdenumsteeland built tohighstandardsofresistance.
Numericalcontrolequipmentand CAD-CAMtechnology havemade it possibletobuildultra-light
crankcaseand radialelasticmountingwithoutjeopardisingthe resistance level.Furthermore, the crankcase
incorporatesthe silent-blockengine mountingsand electric startermotor.
A12 volt,180 Watt alternatorservesthe ignition systemand isused tore-chargethe starterbattery.
Electronicignition and variableautomatictimingguarantee reliability,safetyand optimumengine
performance.
The above featuresensure the MZ201 isa complete, light-weightand reliable propulsion system.
Thismanualaimsto explain asclearlyaspossible howto install and getthe bestoutofyourengine.
WARNING
This is not an aeronautics approved engine.
Thisengine hasnotbeen subjected todurabilityand safetytestsincompliance withaeronauticalstandards.
Itisdesigned to be used in paramotors and ULM oraeroplaneswhere engine failure will notproduce serious
consequences.
The usermustassumeresponsibilityforall risksderivingfromthe useofthisengine and mustunderstand
thatthisengine issubjectto sudden failure.
Engine failuremayresult inan emergencylanding.Such accidentsmaycauseseriousmaterialdamageand
injuries.
Neverusean aircraft fitted withthisengine inareasoratconditionsand altitudeswhich maycause
problemsif forced to land asa result ofsudden engine failure.

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INTRODUCTION
Likeall high-performance engines,the MZ201 demandscareand maintenance. Itisvitallyimportanttouse
suitable fueland a good blend ofsynthetic oil fortwo-stroke engineswith a 50:1 ratio.
Properservicingand appropriate use are essentialrequisites.
ENGINE DELIVERY
Upon deliveryofthe MZ201, checkthatthe componentswere notdamaged duringtransportation.
Free the engine fromanypiecesofpackagingmaterialswhich maystill be trapped between the cylinder
head coolingfinsorcylinder; checkthatthe exhaustmanifold and carburettorare notobstructed.
Il
GUARANTEE
-Duration:
Thisguarantee isvalidforaperiod ofsixmonthsor200 hours fromthe datethe end userpurchased this
engine froma distributor. The invoice isused asproofofpurchase.
-Conditions:
ManufacturerCompactRadialEnginesInc isrepresented bytheir authorised distributors.
The manufacturerreservesthe righttomodifydimensionsand materialswithoutpriorwarning.The
guarantee covers faultycomponentsormanufacturingdefects.
-Thisguarantee doesnotcover:
- The normalwear and tear ofcomponents.
-The piston seizure and drilling.
-The electric starter motor and electric components.
-Damage produced by transporting the engine, accidents,fire, improper use, negligence, infiltration
ofexternalagents,premature wear or corrosion asaresult ofthe engine being immersed inwater or
other causes.
-Labour chargesand the cost oflubricants needed for repairsare to be paid by the customer.

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IMPORTANT SAFETYTIPS
Safetyiseverybody sconcern. We setoutherebelowan incompletelistofthe mainsafetyprecautionsto
be taken when usingthe MZ201. Itwouldbe impossibletolistall the circumstanceswhich mayoccurwhen
you use thisengine, butbybeingaware ofthe potentialdangers, you will also reduce the risks.
Nonetheless, here issome usefuladvice
-Neverblend fuelin a closed environmentwhere the vapours could cause an explosion.
-Ensureall the enginescontrolsarefullyfunctioningand thatyou areabletolocatethe START-STOP
switch. Makesureyou can activateall the controlseasilyand thatyou can thereforeusetheminstinctively
and withouthesitation.
-Neverre-fuelif thereisachance ofthe fueldrippingontothe hotengine. Useonlyapproved containers
and ensure you complywith the relevantsafetyregulationswhen transportingfuel.
-Beforeeach use, checkthe engine sattachmentpoints,propulsion components,fuellines,wiringand fuel
and air filters.
-Useonlyclean fueland blend immediatelybeforeusingthe engine. Checkthe intakeand exhaustports.
When notinuse, protectthe engine topreventimpuritiesfromenteringthe fuellinesorfuelitself.Ensure
everything iscorrectly done before starting the engine.
-The engine mustbe alwaysserviced regularlyin orderto foresee engine failure atall times.
-Neverrun the engine on the ground when the propellerisrotatingunless the aircraft islocated inan area
where you can checkthatnothingand no-one can access the dangerzone.
-Neverabandon youraircraft with the engine running.
-Ifthe engine behavesunpredictably,keep awritten record. Inthe eventofanyproblems,do nottaketothe
air before solvingthe problemand makinga record in the engine logbook.

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TECHNICAL SPECIFICATIONS
Model MZ201
Type two-stroke, two-cylinder, lamellarengine
Coolingsystem air coolingsystem, bymeansofforced air (fan)ora
propeller, dependingon the type ofinstallation
Direction ofrotation anti-clockwise seen fromthe PTO
Capacity 626cc (Nikasil cylinder)
Bore x stroke 76 mm x 69 mm
Compression ratio 9.6 /1
Poweroutput 44.4 hp at4700 rpm
Peaktorque 67 Nmat4700 rpm
Lubrication Fuel/oil blend 50 :1
Fueltype Super95 RON
Ignition Magneto flywheelwith electronic transducerwith
variable timing. Electric regulatorand batterycharger
output: 180W 14.5 Volt
Carburettor Tillotson HR197Awith diaphragmpump.
Sparkplug NGK-CR8HAS Sparkgap:0,7mm
Operatingcylinderhead temperatureCHTmax. 260°C(500°F)
EGTmax . 680°C(1250 °F)
Starting Byhand, bymeansofan automatic re-winderand 450
W electric startermotor
Weight
GMP
31 kg engine completewith, startermotor,manual
starter, speed reducerand silencer.

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MZ201 PERFORMANCE DIAGRAM
MAINTORQUE SETTINGS
Name
Nm
Cylinderhead bolts M6 9 + 2
Crankcase bolts M6 15 + 2
Magneto flywheelnut M10 x 1 70 + 3
Cylindernuts M8 20 + 2
Pump suction pipe takeoff M6 x 1 6 + 2
Sparkplug M10 x 1.0 20 + 2
Propellerfasteningbolts M8 15 + 2
Otherboltsornuts M8 20 + 2
Otherboltsornuts M6 10 + 2
Type:MZ201T
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
50.00
RPM
Hp
0
1
2
3
4
5
6
7
8
Kgm
Hp Kgm
Hp 25.34 29.43 37.89 44.38 40.31 38.56 36.70
Kgm 5.8 5.8 6.4 6.7 5.5 4.8 4.2
3100 3600 4200 4700 5200 5700 6200 0

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OILAND FUEL
Whicheverblend ofoil and fuelyou use, therefollowssomeadvice thatwill helpyou keep the engine in
perfectrunningorder.
•The presence ofimpuritiesinthe fuelisthe maincauseofengine failure. Topreventthe fuelfrombeing
contaminated, it isnecessarytotakeaction atsource, becausethe potentialriskincreasesif impurities
enterthe fueltank.Alwaysuseaclean fuelcontainerthatcomplieswithsafetystandards.Alwaysfilter
the fuelwhen you fill orchangethe containerDonotfill the containertothe brim;neverforgetthatfuel
mayincrease in volume.
•Donotuseblendswhich havebeen stored foralongtimeorwhich havebeen exposed tosunlightina
translucentcontainer. Blend the fueland oil thoroughlybefore fillingthe fueltankbecausethereisarisk
ofthe two liquidsseparatingin time.
•Choose the same type and brand ofoil and stickto it unless it causesproblems. Bydoingso, you will get
toknowthe productwell and you will be abletoassess whetherit suitsyourengine. Ifyou changethe
type ofoil frequentlyand yourengine hasproblems, you will neverknowwhich type ofoil isresponsible.
•Itisextremelyimportanttoavoidswitchingfromsyntheticoil totraditionaloil.The twotypesarenot
alwayscompatibleand, if blended, it ispossiblethatafilmmayformand obstructthe engine s
componentsorcauseotherproblems.Asaruleofthumb, 20%ofcaseswherethe userhasswitched
froma synthetic oil to a traditionaloil hasresulted in problemswith the engine.
•Ifthe engine hasbeen installed the oppositewayup (withthe sparkplugpointingdownwards),choosean
oil thatleavesfewcarbon deposits.Oil depositstend tobuildup inthe lowestparts,forexample, inthe
sparkplugcavity.Ifthesedepositsdo notburnduringnormaluse, the sparkplugisfouled and thismay
result in self-ignition. Manufacturers oftop brand lubricantsguarantee the qualityoftheir products.
Oil specifications: synthetic oil for two-stroke engines: 50 :1 ratio
Fuelspecifications:the octane ratingshould be minimum:R.O.N.93 ormore.

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Howto prepare the blend
Agood method forpreparingthe blend couldpreventagood dealofproblems.Byadoptingthe same
method everytime, the preparation will become an automatic process thatwill simplifymatters no end.
1. Alwaysuseasuitablecontainer: ensureit isclean, free ofcondensation and thatyou knowthe
exactcapacity. To dilute the oil more easily, poura small amountoffuelinto the container.
2. Pourin the required amountofoil. Shake slowlyto blend the oil and fuel.
3. Add sufficientfueltoobtainthe prescribed blend. Ifyou useafilteratthisstage, it shouldhavea
veryfine mesh in orderto filteranywaterorforeign particles.
4. Screwthe lidbackontothe containerand shakevigorously.Pourthe blend intothe fueltankof
youraircraft.Useafunnelwithafilterthatisfine enoughtopreventanyimpuritiesfromenteringthe fuel
tankwhilstallowingthe oil to pass through.
GROUND CHECKS TOBECARRIED OUT BEFORE STARTING UPTHEENGINE FORTHE
FIRSTTIME
Before startingup the engine forthe first time, carryouta generalinspection, checkingin particular:
Ensure the carburettorand fuelfeed circuit are securelyinstalled.
Checkthe suction pressurepipingbetween the crankcaseinletand the fuelpumpon the carburettor,also
checkthe decompression valve and carburettorinlet.
Checkthe condition ofthe electriccablesand thatthe sparkplug shightension lead hasbeen fitted
correctly.
Checkthatthe twoblackcablesgoingfromthe engine shut-off controltothe switch havebeen connected
correctly
Ensurethe silent-blockengine mountingsareproperlyinstalled and thatthe lockingboltshavebeen
tightened sufficiently.
Checkthe reducer, the belt tension and the fasteningscrewon the eccentric.
Neverrun the engine withoutthe propeller; thisisparticularlyimportantforthe modelwithoutforced air
cooling.
Ensure the propellerand lockingboltsare in good condition. Checkthatthe propellerissuitable forthe
engine aswell asthe latter sdirection ofrotation.
(Only good quality balanced propellorsmust be used)

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STARTING UPTHEENGINE FORTHEFIRSTTIMEAND RUNNING IN
The first timeyou start it up, run the engine at2000 -2500 rpmforthe first 15 -20 seconds,then run it at
the lowestrevs(1500 rpm)forafewseconds,beforesteppingup the revsto3000 -3500 rpm.Atthispoint,
werecommend runninginthe engine beforeusingit,pushingthe engine toitsfull potential.Part ofthe
runninginprocess can be carried outinflight.Ifyou choosetodo soon the ground, ensurethe engine is
bolted securelyin position.
•Start the engine and run it at2500 to3000 rpmfor5minutes,then step up the revsto4000 rpmforone
minute before droppingto 3000 rpm.
•Repeatthe process, increasingthe revsto 4000.
•Settleat4500 rpmfor5minutes,then drivethe engine tothe maximumrevsfor10 secondsbefore
returningto 3000 rpm.
•Repeatthe above process, runningthe engine atmaximumrevsfor20 seconds.
•Repeatthe above process, runningthe engine atmaximumrevsfor30 seconds.
•Settleat3000 rpmfor5minutes,then at4000 rpmfor5minutes,then run atthe maximumrevsforone
minute and return to 3000 rpm.
•Run for2 minutesatmax. revs, then drop to 3000 rpm.
•Run for5minutesat4000 rpm,then 3minutesatmax. revs,returnto3000 rpmfor2minutes,then cut
off the powersupplyand stop the engine.
Duringthe above operations, checkthatthe temperature ofthe cylinderhead neverexceeds260°C(500F)
Duringthe running-in, it isparticularlydangeroustoincreasethe quantityofoil if you areusingCastrol
TTS. An excessive amountofoil will cancelthe benefits ofrunning-in the engine.
Duringthe first fewhours ofuse, neverapplyfull powerforprolonged periods,butjustforafewminutes
duringtake-off.Byrunning-inthe engine thoroughly,you will prolongitslife-span. The engine will loosen
up and function atfull powerafterapproximatelyfive hours.
Anyirregularitiesin the engine speed maybe caused bya badlyadjusted carburettor.
Afterthe first hourofuse, checkthatall boltsaretightlyfastened inaccordance withthe torque settings
given in the table on page 7.