HE PARAMOTORES MVL 125 User manual

USER’S MANUAL MVL ENGINE 2019
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USER’S MANUAL MVL ENGINE
C/ Estaño –Nº56
28510 Campo Real
Madrid –España
Mobile: [phone]
Phone: [phone]
Fax: [phone]
E-mail: [email protected]

USER’S MANUAL MVL ENGINE 2019
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INDEX
 INTRODUCTION & IDENTIFICATION
OF THE OWNER
3
 TECHNICAL AND STRUCTURAL
FEATURES
4
 MAIN TORQUES
4 - 5
 ASSEMBLY / ADJUSTMENT/FUEL
CARBURETOR
5 - 7
 RUNNING IN
8
 MAINTENANCE
8 - 10
 TENSION OF REDUCTION BELT /
IGNITION
9 - 10
 WARRANTY
10 - 11
 TROUBLE SHOOTING
 IMPORTANT ADVICE
 PROPELLER FITTING
 HOW TO START THE ENGINE
 NOTES
11 - 12
13
14 - 15
16
17

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 INTRODUCTION
Thank you for choosing the MVL engine. We invite you to spend some time
reading the user’s manual which will help you discover all the features of
your engine. Advices on maintenance and operation will help you to have a
reliable engine and to preserve your investment. Furthermore, we invite
you to deliver this manual together with the engine if you sell it, so it can be
useful for the next owner as well. The manufacturer and the resellers are
ready to answer your questions and, if necessary, to solve every problem,
because OUR CUSTOMERS SAFETY IS THE MOST IMPORTANT THING
FOR US.
IDENTIFICATION OF THE OWNER
Serial number: Owner’s name & address:
Owner’s signature Reseller’s signature Date of sale

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 MVL 125cc WITH CENTRIFUGAL CLUTCH
oENGINE2 - stroke single cylinder
oCOOLING - Extraction from propeller
oCYLINDER CAPACITY - 125 cm3 (54×54)
oCYLINDER - Aluminium Nikasil coated
oCARBURETOR - Walbro WG8
oPOWER - 23 HP / 9.580 R.P.M.
oIGNITION - Electric ignition coil
oTRANSMISSION - Poly V belt driven with centrifugal clutch
oRATIO 1: 3, 65
oSTARTER - Manual pull starter / FLASH OR ELECTRIC STARTER
AVAILABLE
oFUEL - Unleaded gasoline + synthetic oil 2,5 %
oWEIGHT - 14 Kg. complete
oTHRUST - 73 Kg.
oCYLINDER HEAD TEMPERATURE - MAX TEMPERATURE 250°C
oEXHAUST GAS TEMPERATURE NOT EXCEEDING 590 C°
oENGINE MOUNTING - BY 4 SHOCK ABSORBING RUBBER
MOUNTS
oROTATION –COUNTERCLOCKWISE
oSEAL RING - IN VITON WITH VERY HIGH RESISTANCE
oOIL - 2,2% TOP QUALITY OIL 100/100 SYNTHETIC
 MAIN TORQUES
oKg. m(Nm)
oNUTS TO FIX THE HEAD1,6 - 16 RETIGHTEN AFTER 1ST HOUR
oNUTS TO FIX HALF-CRANKCASE 1,6 -16
oNUTS TO FIX THE CLUTCH 3,5 - 35
oNUTS TO FIX BACK PART OF DRIVE SHAFT TO IGNITION FLYWHEEL 2,5 -
25
oGAP BETWEEN COIL AND FLYWHEEL 0,5 mm

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oIT IS VERY IMPORTANT TO RETIGHTEN THE CYLINDER HEAD NUTS AFTER
THE 1ST HOUR OF FLIGHT!
 ASSEMBLY:
You can install the engine on the frame by using 4 rubber mounts of 30 mm.
To attach the propeller use only bolts of class 10/8 (100 Kg) and make sure that their
length is enough to exit from the reductor-pulley. Tighten the 6 bolts M8 in a cross, at
1.5 /2.0 Kg.m.(15/20 Nm). Re-check the torque of the bolts after the first hour of
engine’s working.
For the connection between the carburetor and the fuel tank use a proper hose of the
right diameter. The length of the fuel line must not be more than 80 cm.
IMPORTANT NOTES
DO NOT try to start the engine without the propeller. DO NOT start the engine with
loose bolts or parts, since this can cause the detaching of the propeller, the ovalization
of the propeller holes, and the damage of the rubber mounts.
IMPORTANT! BEFORE FLYING CHECK ALWAYS EVERY PART OF YOUR CRAFT,
FROM ENGINE TO FRAME. Verify that there are no damaged electric wires, that there
are no leaks from hoses, tank, carburetor or engine’s crankcase, that the propeller is not
damaged or loose, that the exhaust-pipe has no cracks, that the frame is not bent or
broken because of falls, that rubber mounts are not cracked, that the reduction belt is
not loose and every bolt is tight. Finally you can start the engine, leaving it to warm up
at a speed of 2.200 to 3.000 rpm with head temperature at least 100 °C.

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 FUEL
Use for the mixture only premium gas for cars 98 octane, together with good-quality,
synthetic oil for mixtures at a quantity of 2,5% (DO NOT USE MIXTURE ALREADY
DONE AT PETROL PUMPS).
When you prepare the mixture, make sure that the can has not dirt or water in it, put
always the oil first and mix thoroughly. Never run the engine without the air-filter,
because dirt and dust raised by the propeller can damage it.

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 ADJUSTMENT OF THE CARBURETTOR
The carburettor has one adjustment screw for the high rpm.
CARBURETOR SETTINGS
MVL ENGINE
H screw
1 hour + 20/30 minutes
This is the standard carb. set up we suggest, as engine manufacturer, of course any
carburator should be adjusted in base of weather conditions and flight altitudes.
WARNING: THE FOLLOWING OPERATION HAS TO BE DONE WHEN THE ENGINE IS
HOT.
For regulating the fuel flows, play gently with lever # 1 opening it in case you need to
make the engine running richer, and viceversa closing it in case you have to run the
engine a little bit lean.
Lever # 2 is used for adjusting the mechanical idle, that we suggest to set up at
2500/2600 RPM.
#3
# 1
#2
Lever #3 controls the choke #
2 and must be kept open

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 RUNNING-IN
All the engines PARAMOTORES HE have a quality control before being delivered in
order to verify if all the components related to the fixed parameters, but a further
running-in is still necessary.
A CORRECT RUNNING-IN PROCESS WILL PROLONG THE LIFE OF YOUR
ENGINE!
Go to a quiet place, put a thick rubber carpet under your craft to avoid that stones
or other things damage the propeller by putting it on earth and let the engine work
at a speed of 2500 rpm for 5 minutes, then regulate speed at 3000/3500 rpm for
15 minutes, then at 4000 rpm for other 15 minutes.
Switch off the engine and check that there are no loose nuts or bolts and that
every component is ok.
DO NOT TOUCH THE HOT PARTS! (POWER UNIT AND EXHAUST PIPE).
Start the engine again and take it step by step to 4000 rpm for 5 minutes, then
accelerate to 4500 rpm for 15 minutes.
During the first 10 hours, do not subject the engine to extreme efforts and speed.
Also during normal use excessive loads (ex. tandems with passenger) can force
the engine with possible damages to the engine itself.
ALWAYS CHECK at sight your craft before and after every flight, for loose parts
or damage.
During the run-in period vary the power often for a proper piston ring setting.
 MAINTENANCE
oAFTER THE FIRST HOUR OF RUNNING, CHECK THE BELT TENSIONING
AND TIGHTEN IT IF NEEDED.
oAFTER THE FIRST 2 HOURS, TIGHTEN HEAD NUTS (IN CROSS ORDER)
WITH A TORQUE WRENCH AT 1.6 Kg.m (16Nm).
oAFTER THE FIRST 3 HOURS OF ENGINE RUNNING MAKE A NEW BELT
CHECK UP AND IN CASE RETENSIONING IT AT 350 HRZ
- Every 20 hours:
oCheck the condition and gap (0.7 mm) of the spark plug

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oClean the air-filter, the carburettor filter placed at the end of the fuel
pipe and the filter of the fuel tank
oCheck the torque of every bolt
oCheck the tension and condition of the reduction belt
oCheck fuel lines and wiring
oCheck that the cord of the starter has no abrasions.
- Every 50 hours
oSame controls of the 20 hours and furthermore:
oCheck the torque of the engine’s crankcase nuts
oChange spark plugs
oChange the petals of the reed valve
oCheck the reduction belt and the play of pulley bearings, change them
in case of need
oCheck the conditions of the starter gears (version with electric start)
oOnce a year (independently from flight hours) change the diaphragm of
the carburettor.
oN.B. It is advisable to keep records of all maintenance in a log book for
the engine.
It is also advisable to install an instrument (CHT) to control the head
temperature at sight.
 TENSION OF THE REDUCTION BELTDRIVE –USE
CAUTION
Attention:abeltwhichisovertensioned candopermanentdamageto
bearings of pulley anddrive shaft.
Therefore we strongly suggest for you to follow carefully these
instructions.
Beforeadjustingthebelt takeafeltpenormarkerandmakeasmallsignonthecamshaft
andon the front of the reduction plate.
ThisisyourZeroorstartpointandfromhereyouwillbeabletoclearlyseehowmuch
youmove the eccentric tensioningcam in relationto thereductionplate.
Remember theseareFineadjustments andwesuggestnottorotatethecamanymore

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than1 mmperadjustment.Aftereachadjustmentyoucan try tostart theengineand
check theresult.
Iftheenginedoesnotstartwellthenitusuallymeansthebeltisstilltoolooseandis
slipping, in this case repeatthe operationbytensioningthe beltanother1 mm.
Consider that if the beltslips a little, butthe engine still startsfine, then the tension is
correct. Belt tension always increases automatically when the engine is running
because of thermal expansion in thepulleys.
Once you havefound thecorrect tension, donot adjust itanymore.Incaseofdoubts
please contact yourparamotordealer–ortheHE team.
To adjust the belt do the following:
oLoosenthecamofpulleyboltlocated,oncethisisloosenedthenyoucanturnthe
camwitha
n.27 mm size wrench - careful to observe the 1 mm increments.
oOnceyouhavefinishedturningthecamremembertore-tightenthesafetyboltsat
2,5kg.(25 Nm),firstthebackbolt,bykeepingfirmthecamwiththewrench,and
thenthesidebolt.
 IGNITION
Incasethecoiland/orthehandwheelmustbechanged,itiscompulsorytoturntoyour
dealer or to trained personnel, even if this operation can appear simple at the first
sight,sincethetiming oftheengine,ifwrong,canchangetheperformanceandcause
damage to the engine. To check the timing: the distance between the coil and the
flywheelmagnetis0,4-0,5mm.
 WARRANTY
Warranty includes spare parts and labor, transport excluded.
For any defective part, please contact your reference authorized dealer or HE
directly, so that you can get proper indications about how to handle it.
DURATION OF WARRANTY
1 YEAR beginning from the date of purchase from PARAMOTORES HE.
WARRANTY IS VOID IN THE FOLLOWING SITUATIONS:
Alterationsto the enginenotapprovedbyPARAMOTORESHE.
Wear & tear of components of the engine due to the instructions within
the product manual not being adhered to.

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Accidentalfallsordroppingof theengineor itscomponents.
Overheating and seizure of the engine due to prolonged high speed
running of the engine, running with excessive loads, running with
inadequate loads, running with insufficientoilinthepetrol(forawrongtuning
ofthecarburetor)orrunningwithpetrol only (oil mixtureomitted).
Thepresenceofdirt,sandorforeignbodiesinthecarburetoroftheengine.
 Corrosion through bad storage of the engine orinadequate preparation for
storage of the engine.
Running the enginewithout an air-filterfittedto the carburetor.
Miss-assembly of engine parts or components not assembled by
PARAMOTORES HE but by the manufacturer of the paramotor or by the end
user, supplied disassembled for packing and transport purposes, included all
electrical orelectroniccomponents.
Corrosionoftheengineorcomponentsemanatingfromstonechipsoranyother
impact or abnormal stress damage.
Workother than the maintenance setout in the product manual having
been carried out ontheenginebyanyoneotherthan PARAMOTORESHE
orofficialdealers.
Incidentalorconsequential loss or damage.
Engine used for racing use.
PARAMOTORES HE AND ITS RESELLERS REMAIN AT YOUR
DISPOSAL FOR EVERY INFORMATION AND ADVICE ABOUT THE
USE OF THE ENGINE
 TROUBLE SHOOTING
THE ENGINE DOES NOT START
Please check:
switch on-off
cable of the spark plug
correct spark plug gap
all the connections of the electric plant
that fuel arrives correctly from the tank to the carburettor
FLOODED ENGINE

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Dismantle the spark plug
dry it well
before re-assembling it, let the propeller turn slowly 2/3 times.
THE ENGINE DOES NOT HOLD IDLE SPEED OR HAS AN IRREGULAR
SPEED
Clean and adjust the carburettor.
Check the reed valve petals are closing completely.
Hold the reed up to a light and you should not see any light past
the petal seating area.
THE ENGINE CANNOT REACH MAXIMUM SPEED
Check cable pulling throttle fully open.
Check that there is no dirt in the carburettor or tank-filter nor
restrictions in the fuel pipe, due to too tight curves, or air
bubbles.
Check the spark plug; is it’s worn, change it with one of the
same brand and same heat range.
In case the head is dismantled to be decarboned, change both
the head gasket and the cylinder gasket.

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 IMPORTANT ADVICE
DO NOT FLY in bad weather conditions!
NEVER switch on the engine with people near propeller, or to
sides.
The BREAKAGE of a propeller can cause very severe hurts
even several meters away.
DO NOT keep engine at peak rpm after the take off, except for the
absolutely necessary time and for emergencies (obstacles or
sudden wind).
If you use big propellers, REMEMBER that cooling is not perfect
flying at high speed, so keep under control the temperature of the
engine with proper instruments (CHT).
In addition, dismantle the propeller at regular intervals and check
that it is perfectly balanced, since an unbalanced propeller, even
slightly, creates micro-vibrations which are not felt by the pilot, but
can damage seriously parts of the engine with consequent
breakages.
Please do NOT forget that the propeller has mass and a
considerable inertial moment, so it’s advisable not to vary suddently
the RPM of the engine, both in flight and on the ground.
These sharp and violent stresses could cause damages to the
reduction, to the engine, to the belt and also possible deformations
to the fixing holes of the propeller.
Once you have found the perfect carburation, DO NOT modify it
unless you change flying place going to much higher or lower
altitudes or unless climate and temperature are very different from
the ones where you fly usually.

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 PROPELLER FITTING
Paramotores HE recommends using the Helix propellers.
In the case of propeller impact, it is necessary to verify that all the engine parts
have not suffered any damage, paying particular attention to the components
listed below: Reduction pulley and bearings; Reduction eccentric; Engine carter,
engine carter support and engine rubber mounts.

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The propeller’s rotation is counterclockwise, considering the back view.
Push the propeller against the reduction drive, until it is completely
inserted. Now gently screw the bolts up to the end. Be sure that the bolts
are suitable to the propeller in use.
Maximum pressure to apply:
• Carbon propeller: 10-12 N/m on every M6 bolt;

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 HOW TO START THE ENGINE
We wish to remind you that a correct priming is the key for starting any 2
stroke engine.
Please follow the following instructions:
1. Lightly press pin on WG8 cover metering diaphragm for priming
the carburetor.
2. Stop priming the engine once fuel gets inside the WG8.
Remember that the less fuel gets in the smaller is the risk to
overflood your engine, which will make you even difficult to start it.
1. Quickly pull the rope, without reaching end run.
In winter time, or in cold weather, you may help the engine start by closing
the choke ( lever # 3).
Pull the rope 2-3 times, until you hear the blow in engine combustion
chamber, then open again the choke, and start the engine.
During the start-up phase, always pay maximum attention to the propeller
and to those who could be nearby. Many accidents happen before to flying.
On every test or warm-up, we suggest always wearing the paramotor on
your shoulder, to fasten the harness, take a look around, then to turn on
the engine with the pull (or electric) starter, however always be ready to
press the shutdown button, in order to stop the motor in any moment if
necessary.

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Notes: