The reducer ..................................11 ................................13 Trouble-shooting Wiring diagram ................................16 Maintenance schedule ..............................17 ............................18 Exploded view of the MZ201 Preliminary flight inspection ............................19 ..............................20 Engine repairs logbook Modifications or different mountings Date Compared to original model...
Electronic ignition and variable automatic timing guarantee reliability, safety and optimum engine performance. The above features ensure the MZ201 is a complete, light-weight and reliable propulsion system. Like all high-performance engines, the MZ201 demands care and maintenance. It is vitally important to use suitable fuel and a good blend of synthetic oil for two-stroke engines with a 50:1 ratio.
INTRODUCTION Like all high-performance engines, the MZ201 demands care and maintenance. It is vitally important to use suitable fuel and a good blend of synthetic oil for two-stroke engines with a 50:1 ratio. Proper servicing and appropriate use are essential requisites.
Safety is everybody’s concern. We set out here below an incomplete list of the main safety precautions to be taken when using the MZ201. It would be impossible to list all the circumstances which may occur when you use this engine, but by being aware of the potential dangers, you will also reduce the risks.
TECHNICAL SPECIFICATIONS Model MZ201 Type two-stroke, two-cylinder, reed valve engine air cooling system, by means of forced air (fan) Cooling system or a propeller, depending on the type of installation Direction of rotation Counter-clockwise seen from the PTO Capacity 626cc (Nikasil cylinder)
OIL AND FUEL Whichever blend of oil and fuel you use, there follows some advice that will help you keep the engine in perfect running order. The presence of impurities in the fuel is the main cause of engine failure. To prevent the fuel from being contaminated, it is necessary to take action at source, because the potential risk increases if impurities enter the fuel tank.
How to prepare the blend A good method for preparing the blend 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 no end. 1. Always use a suitable container: ensure it is clean, free of condensation and that you know the exact capacity.
STARTING UP THE ENGINE FOR THE FIRST TIME AND RUNNING IN The first time you start it up, run the engine at 2000 - 2500 rpm for the first 15 - 20 seconds, then run it at the lowest revs (1500 rpm) for a few seconds, before stepping up the revs to 3000 - 3500 rpm. At this point, we recommend running in the engine before using it, pushing the engine to its full potential.
FINAL CHECK After having inspected all the bolts, there is one final and extremely important component to be checked: the spark plug. The spark plug is a sufficiently reliable indication of the carburation. Remove the spark plug and check the colour of the ceramic insulator at the electrode end. If it has turned a mid-brown colour, the carburetor has been adjusted correctly.
ADJUSTING THE CARBURETTOR Please see the separate “Tillotson” manual for high and low speed carburetor adjustment. Throttle cable - Once the throttle cable has been fitted, adjust the freeplay between the carburetor and the throttle lever by adjusting the tensioning device. - Set the throttle lever to minimum.
F = 5 kg When the MZ201 leaves the factory, it is already fitted with a speed reducer and the belt tension is adjusted correctly. However, during the first few minutes of use, the belt “settles” into position and loosens slightly.
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ALIGNING THE PULLEYS When replacing one of the two pulleys in order to change the reduction ratio and adapt it to the propeller diameter, always check that the two pulleys are perfectly aligned. A misalignment of over 0.5 mm, could shorten the life-span of the belt.
TROUBLE-SHOOTING Whatever model you choose, the engine will only function if: - good spark is produced, - there is a proper air/fuel mix. Often, the majority of problems arise when one of the above conditions is lacking. Get organized and follow a strict procedure in order to identify the problem. Fault finding must be a logical process.
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2. PROBLEM: INCONSISTENT IDLE Probable cause Remedy The starter motor is switched on. Switch off the starter motor. Badly adjusted carburetor/s. Adjust the carburetor/s. The inlet manifold is leaking. Tighten the joint, replace any faulty parts. 3. PROBLEM: THE ENGINE IS RUNNING IRREGULARLY Probable cause Remedy Check the spark plug, clean it inside and...
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5. PROBLEM: THE PERFORMANCE OF THE ENGINE IS UNSATISFACTORY Probable cause Remedy The recommended fuel mix has not been Check the fuel mix. used. Insufficient fuel feed. Check the fuel feed and clean the fuel filter if necessary. The air filter is dirty. Clean or replace the air filter.
The white connector must be connected as shown in the drawing: No.2 with No.3 No.5 with 6 and 1 Connect one ground cable to the engine One ground cable to the regulator One ground cable to the battery Connect the "+" wire directly to the battery Engine must run with the switch closed - Regulator must charge with the switch closed WARNING Ensure the battery cables are securely soldered to the terminals.
MZ201 ENGINE MAINTENANCE SCHEDULE Checks and work to be carried out (hours) 100 125 150 175 200 225 250 1) Tighten the cylinder head screws 2) Check the starter cable 3) Check the starter ring gear 4) Check the spark plug...
Daily checks (To be carried out as part of the preliminary flight inspection at the beginning of each flying day) Check the electrical contact is on “stop”. Remove any water contained in the fuel tank. Check the inlet manifold and the carburetor are securely fitted. Warning: a cracked inlet manifold may perforate the piston.
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