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How to prepare your Fuel/Oil Mixture 

 

A good method for preparing the fuel/oil mixture could prevent a good deal of problems. By 

adopting the same method every time, the preparation will become an automatic process that 

will simplify matters. 

 

Always use a clean approved container: make sure it is also free of condensation and that you 

know the exact capacity. 

 

1.

 

To dilute the oil more easily, pour a small amount of fuel into the container. 

 

2.

 

Pour in the required amount of oil. Shake slowly to mix the oil and fuel. 

 

3.

 

Add sufficient fuel to obtain the prescribed fuel/oil mixture. If you use a filter at this stage, 

it should have a very fine mesh in order to filter any water or foreign particles. 

 

4.

 

Screw the lid back onto the container and shake vigorously. Pour the fuel/oil mixture into 

the fuel tank of your aircraft. Use a funnel with a filter that is fine enough to prevent any 

impurities from entering the fuel tank whilst allowing the oil to pass through. 

 

PRE-START PROCEDURES 

 

Before starting up the engine for the first time, carry out a general inspection, checking in 

particular: 

 

- The carburetor and fuel feed circuit are securely installed. 

- Check the vacuum pressure tubing between the crankcase inlet and fuel pump, if you have a 

Bing carburetor, or the base of the carburetor if you have a Tillotson model. 

- Check the condition of the electric cables and that the spark plug’s high tension lead has been 

fitted correctly. 

- Check that the two black cables going from the engine shut-off control to the switch have 

been connected correctly 

- Ensure the rubber engine mounts are properly installed and that the locking bolts have been 

tightened sufficiently. 

- Check the gear box and all bolts, nuts on the gear box. 

- Never run the engine without the propeller; this is particularly important for the free air 

model. 

- Ensure the propeller and locking bolts are in good condition. Check that the propeller is 

suitable for the engine as well as the direction of rotation is correct. 

 

 

Summary of Contents for MZ202

Page 1: ...0 ...

Page 2: ...e Start Procedures 8 Starting up the engine for the first time 9 Step One Break In 9 Final check 10 Start up procedure 10 Adjusting the carburetor 11 The Gear Drive 12 Trouble shooting 13 Wiring diagram 16 Maintenance schedule 17 Exploded view of the MZ202 18 Preliminary flight inspection 19 Engine repairs logbook 20 Installation sketch of the MZ202 21 Modifications or different mountings Compared...

Page 3: ...not produce serious consequences The user must assume responsibility for all risks deriving from the use of this engine and must understand that this engine is subject to sudden failure Engine failure may result in an emergency landing Such accidents may cause serious material damage injury and or death Never use an aircraft fitted with this engine in areas conditions and altitudes that may cause ...

Page 4: ...rol C N C equipment and CAD CAM technology have made it possible to build ultra light crankcase Furthermore the crankcase incorporates the electric starter motor A 13 8 volt 180 Watt alternator serves the ignition system and is used to re charge the starter battery Electronic double ignition switching type with variable automatic timing guarantee reliability safety and optimum engine performance T...

Page 5: ...c starter motor Damage produced by transporting the engine accidents fire improper use negligence Damage produced by premature wear or corrosion as a result of the engine being immersed in water or other causes Replacement parts and or accessories that are not genuine MZ parts and or accessories Damage resulting from the installation of parts other then genuine MZ parts Damage caused by failure to...

Page 6: ...ping onto the hot engine Use only approved containers and ensure you comply with the relevant safety regulations when transporting fuel Before each use check the engine s mounting points propulsion components fuel lines wiring and fuel and air filters Use only a clean fuel oil mixture immediately before using the engine Check the intake and exhaust ports When not in use protect the engine to preve...

Page 7: ... Lubrication Fuel oil blend 50 1 synthetic oil Castrol TTS Fuel type Super 95 RON Ignition Magneto flywheel with electronic transducer with variable timing Electric regulator and battery charger output 180W 13 8 Volt Carburetor 2 x Bing 54 with float chamber and fuel pump Spark plug NGK CR8HSA spark gap 0 7 mm 0 027 Operating temperature CHT max 260 C 500 F EGT max 680 C 1250 F Starting By 450 W e...

Page 8: ...Name Nm Cylinder head screws Crankcase screws Magneto flywheel nut Cylinder nuts Spark plug Wooden Prop fastening screw Other screws or nuts Other screws or nuts Fan case Fan nut M6 M6 M10 x 1 M8 M10 x 1 5 M8 M8 M6 M6 M6 16 16 70 26 16 5 2 20 2 10 2 10 2 15 3 ...

Page 9: ...oduct well and you will be able to assess whether it suits your engine If you change the type of oil frequently and your engine has problems you will never know which type of oil is responsible for any problems you may have It is extremely important to avoid switching from a synthetic oil to a mineral based oil The two types are not always compatible and if mixed it is possible that a film may for...

Page 10: ...purities from entering the fuel tank whilst allowing the oil to pass through PRE START PROCEDURES Before starting up the engine for the first time carry out a general inspection checking in particular The carburetor and fuel feed circuit are securely installed Check the vacuum pressure tubing between the crankcase inlet and fuel pump if you have a Bing carburetor or the base of the carburetor if y...

Page 11: ...ancel the benefits of the break in procedure of this engine Now that you have completed step one Step two is to increase the revolutions of the engine in increments of 1000 rpm every five seconds up to full throttle and maintain full throttle for one full minute During this time monitor the EGT max 1250F and CHT max 500F then reduce the rpm in increments of 1000 rpm every ten seconds down to idle ...

Page 12: ...prematurely Too weak or lean a blend however may cause irreversible damage to the cylinder and piston The engine is now ready to be used as intended START UP PROCEDURE Ensure the contact is on start and that you are able to disconnect the circuit immediately if necessary Allow fuel to enter the fuel lines and carburetor by using your plunger primer Adjust the throttle position about 20 Press the s...

Page 13: ...r faster and adjust accordingly To do so turn the air screw slowly in the appropriate direction this operation should only be attempted with the engine mounted on a test stand or by trial and error with the engine switched off due to the proximity of the propeller It may be necessary to give the screw a turn more or less than the prescribed amount 2 Idle adjustment The minimum number of revs is 18...

Page 14: ...otation The only way of reducing the noise and boosting performance is to fit a gear reducer between the engine and the propeller Choosing the right reduction This engine is sold with mechanical gear reduction which includes helical gears We choose this type of gear for the minimum noise it makes and for the power it can give in a compact size Our gear reduction also includes a centrifugal clutch ...

Page 15: ...pen for 5 seconds then replace the spark plugs The spark plug is damp on account of excessive condensation Dry the spark plug carefully The spark plug electrodes are further apart than the recommended distance Adjust electrodes so that the distance is 0 7mm as indicated in the technical specifications The electrodes are worn away Replace the spark plugs The spark plug is dirty oil and lead deposit...

Page 16: ...nd out adjust the distance between the electrodes Replace if necessary Defective or damp high tension lead Dry any damp cables or replace the damaged cable if it cannot be repaired Faulty spark coil Replace with an identical coil do not change model Fuel or air filters are obstructed Clean or replace the filters 4 THE ENGINE HAS STOPPED Probable cause Remedy The fuel tank is dry Re fuel The fuel l...

Page 17: ...he fuel filter if necessary The air filter is dirty Clean or replace the air filter The air inlet is leaking Tighten all joints check the carburetor joints for air tightness Carburetor diaphragm for engines fitted with diaphragm carburetors Replace the diaphragm No ignition The ignition system is faulty Check the ignition circuit Adjust the ignition Bad carburation Check the carburetor adjustments...

Page 18: ...harness Ensure the battery cables are securely soldered to the terminals Bad connections will lead to wire over heating and irreversible damage to the battery If you wish to be able to disconnect the battery cable connectors of the right size may be used Remember that the battery generates 700amps if a short circuit occurs When connecting the battery and start up motor always ensure the gauge of t...

Page 19: ...X X X X 11 Check balance and tracking of propeller X X X X X X X X X X X 12 Replace propeller fastening screws X X 13 Clean air and fuel filters lubricate air filter X X X X X X X X X X X 14 Replace fuel filter do not use paper filters X X 15 Check the carburetor adjust idle setting and cable tension X X X X X X X 16 Clean carburetor and check the condition of the idle pipe X X X X X 17 Replace fl...

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Page 22: ...20 Engine repairs logbook Date Report of the repairs carried out ...

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