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BLACK BULL 

USER’S MANUAL 

Last update September 2020 

 
 
 
 
 
 
 
 
ENGINE CONFIGURATIONS AVAILABLE: 
 
ELECTRIC STARTER 
HAND STARTER 
HYBRID  
 
 
 
 
 
 
 

  

      

 

Summary of Contents for BLACK BULL

Page 1: ...BLACK BULL USER S MANUAL Last update September 2020 ENGINE CONFIGURATIONS AVAILABLE ELECTRIC STARTER HAND STARTER HYBRID ...

Page 2: ...ION OF THE OWNER AND INTRODUCTION 2 TECHNICAL AND STRUCTURAL FEATURES 3 MAIN TORQUES 5 ASSEMBLEY 6 ADJUSTMENT CARBURETOR RUNNING IN 7 8 MAINTENANCE 9 TENSION OF REDUCTION BELT 11 WARRANTY 13 TROUBLE SHOOTING 14 IMPORTANT ADVICE 15 NOTES 19 ...

Page 3: ...sive property of CORS AIR So they are not allowed reproduction or replication in whole or part without the express permission of the CORS AIR This manual has been prepared to provide technical information necessary for the installation and repair of motors We invite you to spend some time reading this to avoid risks to the health and safety of people and economic damage Furthermore we invite you t...

Page 4: ... PLATED ROLLER BEARINGS CARBURATOR DIAPHRAGM FEEDING SIX BLADE REED VALVE SYSTEM CONNECTED TO THE CRANKCASE SPARK PLUG NGK BR8ES OR SIMILAR SYSTEM SIX PORT DISTRIBUATION AND EXHAUST WITH BOOSTER CYLINDER IN ALLOY WITH NIKASIL COATING REDUCTION WITH POLY V BELT AVAIBLE IN 1 3 0 CYLINDER HEAD TEMPERATURE MAX TEMPERATURE 230 C MEASURED UNDER SPARK PLUG EXHAUST GAS TEMPERATURE NOT EXCEEDING 590 C ENGI...

Page 5: ...MOTO OIL 2 2 2 5 ENGINE WEIGHT HAND START KG 16 7 COMPLETE WITH 2018 VERS EXHAUST AND INCLUDING RUBBER MOUNTS AND AIRBOX IN CARBON ELECTRIC START KG 17 4 COMPLETE WITH 2018 VERSION EXHAUST INCLUDING RUBBER MOUNTS AND AIRBOX IN CARBON ...

Page 6: ...S Kg m Nm NUTS TO FIX THE HEAD 2 5 25 NUTS TO FIX HALF CRANKCASE 1 2 12 NUTS TO FIX THE PINION SMALL PULLEY 3 5 35 NUTS TO FIX IGNITION HANDWHEEL manual version 4 5 45 NUTS TO FIX IGNITION HANDWHEEL electric version 2 5 25 GAP BETWEEN COIL AND HANDWHEEL MIN 0 3 mm MAX 0 4 mm TIGHTENING OF REED VALVES PLATE 1 2 12 PISTON RINGS GAP TOLLERANCE 0 25 mm ...

Page 7: ...vice will allow the fuel to arrive to the carburettor protecting in this way the battery 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 the damage of the electric start and the breakage of the rubber mounts BATTERY must be loaded and use...

Page 8: ...d of an adjustment phase of the engine the running in is still a fundamental step in its life for getting the best performance and reliability The parts that require a longer running time for the operation of the propulsion and that need to get to an optimum settling are cylinder and piston During the running in phase and limited to this period only the fully synthetic oil percentage is 2 5 All en...

Page 9: ... ENGINE AT FULL THROTTLE FOR A LONG TIME The engine running in is finished respect your engine and it will become your trustworthy partner in flight CARBURETOR Your Black Bull is equipped with a Tryton carburettor specially adapted for the Cors Air engines It is a top quality membrane carburettor 100 made in Italy that grants an optimal performance with decreased consumption and a better atomizati...

Page 10: ...y 20 hours check The condition and gap 0 7 mm of the spark plug electrode Clean the air filter in case you have a fuel filter before carburetor clean it also The torque of every bolt The tension and condition of the reduction belt Fuel lines and wiring That the cord of the starter has no abrasions Every 50 hours check Same controls of the 20 hours and furthermore The torque of the engine s crankca...

Page 11: ...e at sight it is important because you can understand when your engine is running at the proper temperature before taking off If you install also an EGT probe you will be able to check the temperature of exhaust gas and avoid the engine seizure The max temperature of exhaust gas is 590 C DO NOT EXCEED THIS TEMPERATURE Tutorials on our web page at http www corsairmotors com en download ...

Page 12: ...elation to the reduction plate Remember these are Fine adjustments and we suggest not to rotate the cam any more than 1 mm per adjustment After each adjustment you can try to start the engine and check the result If the engine does not start well then it usually means the belt is still too loose and is slipping in this case repeat the operation by tensioning the belt another 1 mm Consider that if ...

Page 13: ...ould you notice any black rubber dust inside small pulley pinion your belt needs to be re tensioned because it is loosing IGNITION ONLY FOR ENGINE WITH HAND START In case the coil and or the handwheel must be changed it is compulsory to turn to your dealer or to trained personnel even if this operation can appear simple at the first sight since the timing of the engine if wrong can change the perf...

Page 14: ...uning of the carburettor or running with petrol only oil mixture omitted The presence of dirt sand or foreign bodies in the carburettor of the engine Corrosion through bad storage of the engine or inadequate preparation for storage of the engine Running the engine without an air filter fitted to the carburettor Miss assembly of engine parts or components not assembled by CORS AIR but by the manufa...

Page 15: ...CARBURETTOR DISMANTLE THE SPARK PLUG AND DRY IT BEFORE REASSEMBLING SPARK PLUG TAKE OFF THE FUEL LINE FROM CARBURETOR AND START THE ENGINE 2 3 TIMES THE REED VALVE PETALS ARE OPENED OR BROKEN CLEAN AND ADJUST THE CARBURETTOR CABLE PULLING THROTTLE IS NOT FULLY OPEN CLEAN THE CARBURETOR NETS inside THERE IS NO TANK FILTER RESTRICTION IN THE FUEL PIPE SPARK PLUG CHANGE HEAD GASKET AND THE CYLINDER G...

Page 16: ...ervals 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 suddenly the RPM of the engine both in flight and on the ground The...

Page 17: ...start Unscrew the spark plug and pour into the hole a teaspoon of oil for engines then re install the spark plug letting the propeller turn slowly by hand for 2 or 3 times completely Disassemble the propeller Loosen the reduction belt Plug the hole of the exhaust pipe Cover everything with a cloth and put it in a dry place Once a month charge the battery and let the pinion of the drive shaft turn ...

Page 18: ...t or medium Loctite on the 4 6 pins and tighten them completely Always use the aluminium disk Insert the propeller Insert the propeller disk Insert the central bolt and tighten it at about 1 5 Kg 15Nm checking that the clip can be inserted Insert the safety clip ...

Page 19: ...Y REGULATOR WILL FAIL 1 4 WHEN REGULATOR USED WITHOUT BATTERY IT WILL FAIL 1 5 UNIT TEMPERATURE WORKING RANGE 10 C TO 50 C on unit surface BLUE WIRE TO THE COIL BLACK WIRE TO THE NEGATIVE PIN OF BATTERY RED WIRE TO POSITIVE PIN OF BATTERY Note for lead battery 1 1 limited voltage 16VDC 1 2 when reversed connected to battery regulator will fail 1 3 when regulator used without battery it will fail 1...

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