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Cors-Air M 25 Y/Black Devil Manual

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CORS-AIR M 25 Y / Black Devil

INTRODUCTION

Thank you for choosing our engine the CORS-AIR M 25 Y/Black Devil.
Your engine has many superior features that have been developed, tested and introduced by JPX
Italia over the few years this engine has been used in the ultralight industry. The high quality Cors-Air
M25Y/Black Devil is the most copied engine of its kind in the World. Fly with confidence, you own the
superior original.
We invite you to spend some time reading this manual, which will let you discover all the features
of your engine. Advice on maintenance and operation will help you to have a reliable engine and to
preserve your investment providing you years of reliable use. Furthermore, we invite you to deliver this
manual together with the engine should you decide to 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 THE SAFTEY OF YOURSELF AND OTHERS IS THE MOST IMPORTANT THING
FOR US.
Welcome to the Cors-Air World!

IDENTIFICATION OF THE OWNER

Owner
Address
Engine serial number
Reseller
Address
Owner's signature
Reseller's signature and stamp
Date of sale
1

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Summary of Contents for Cors-Air M 25 Y/Black Devil

  • Page 1: Introduction

    Your engine has many superior features that have been developed, tested and introduced by JPX Italia over the few years this engine has been used in the ultralight industry. The high quality Cors-Air M25Y/Black Devil is the most copied engine of its kind in the World. Fly with confidence, you own the superior original.

  • Page 2: Table Of Contents

    CONTENTS INTRODUCTION ................................1 IDENTIFICATION OF THE OWNER ..........................1 IMPORTANT NOTES ..............................4 Preflight / Postflight Safety Check ..........................5 ASSEMBLY: ..................................5 Operation ..................................6 Fuel / Mixing ..............................6 RUNNING-IN ..............................6 Tuning your Carburetor..............................7 Starting your ENGINE GENERAL Tips.
  • Page 3 CORS-AIR M 25 Y PARTS ..........................18 CORS-AIR M 25 Y ELECTRIC STARTER PARTS ....................19 ELECTRICAL SCHEMATIC (Electric Start only) ....................19 CORS-AIR M 25 Y / Black Devil Specifications ......................20 TECHNICAL FEATURES ............................ 20 Main Torques ..............................20 EGT Placement: ..............................

  • Page 4: Important Notes

    IMPORTANT NOTES Do NOT try to start the engine without the propeller. Severe engine damage can occur. NEVER start the engine with people near propeller or the sides. The breakage of a propeller can cause severe injury even several meters away. Do NOT start the engine with loose bolts or parts.

  • Page 5: Preflight / Postflight Safety Check

    Harness and bindings. ASSEMBLY: The CORS-AIR M 25 Y engine can be installed on a sturdy frame by using 4 rubber mounts of 40 mm between the back flange and the engine mount. It is suggested to install also the 5 rubber mount (20x30), fixing it in the proper hole located under the reduction flange through an angular square.

  • Page 6: Operation

    Otherwise a less effective position between the carburetor and fuel filter can be used. RUNNING-IN All CORS-AIR engines, before being delivered, are subject to a severe quality check in order to verify if all components are functioning correctly, but a further engine running-in will be required. A proper running-in will prolong engine life.

  • Page 7: Tuning Your Carburetor

    TUNING YOUR CARBURETOR A properly tuned engine idles and accelerates smoothly, does not smoke heavily and runs at 20- 60 RPM below maximum RPM. Your Black Devil engine comes tuned with the factory default carburetor setting: LO 1/2 to 3/4 turns counterclockwise open from fully seated and 1 1/2 to 2 turns counterclockwise open from fully seated.
  • Page 8 Tuning your HI (no TACH) Please read this section thoroughly to prevent engine damage from occurring When tuning the HI, the ideal mixture is reached when the insulator of the spark plug is coffee brown without carbon deposits. A black sooty plug means the engine is too rich, and white/grey plug means the engine is too lean.

  • Page 9: Starting Your Engine General Tips

    which can result in engine damage. Remember, even a slightly leaner mixture on the low RPM side is safer than on the high RPM side. 2-cycle engines should not be run in idle position for long periods of time as there is less lubrication and the fuel mixture burns less clean resulting in fouled spark plugs. When flying in idle for long periods of time, it is advisable to open the throttle from time to time to "clear"...

  • Page 10: Black Devil Engine Troubleshooting

    2) Starting the Engine: Check your surroundings and verify the area is clear. Securely grasp the paramotor frame near where the engine mounts to the frame in your free hand. Check to see that the throttle is in the idle only position and then start the engine using a smooth full stroke when pulling.

  • Page 11: Flooded Engine

    Fuel  Fuel arrives correctly from the tank to the carburetor Check supply lines to ensure fuel is making it t the carburetor intake. (See Starting Sequence.)  Flooded engine (See Flooded Engine)  Carburetor is properly tuned (See Tuning Your Carburetor) ...

  • Page 12: The Engine Does Not Hold Idle Speed Or Has An Irregular Speed

    THE ENGINE DOES NOT HOLD IDLE SPEED OR HAS AN IRREGULAR SPEED  Dirty or incorrectly adjusted carburetor. Clean and adjust the carburetor (see Tuning Your Carburetor)  Belt tension loose. (See ADJUSTING THE REDUCTION BELT DRIVE TENSION)  Partial Vapor Lock (See Fuel system Vapor Locks) ...
  • Page 13 The pop off pressure can greatly vary between each manufactured carburetor. The Cors-Air engine works best with the pressure not between 10 and 11psi. This value is just a general guide. Altitude, temperature and other specific factors (airbox or air filter) can affect carburetor performance.

  • Page 14: Pop-Off Pressure Testing

    Pop-off pressure testing Before testing we must make sure that the carburetor is "wet" inside. If it was overhauled, before testing, it will need to have fuel added inside otherwise the pressure value will not be accurate. 1) Prime the carburetor before testing. 2) Connect fuel hose to the fuel inlet of the carburetor.
  • Page 15 Increasing a too low pop off pressure In order to increase the pressure we need to use a stronger spring or very carefully expand the existing one. This operation needs to be done in very small increments; otherwise you will end up with a very high pressure.

  • Page 16: Maintenance And Parts

    MAINTENANCE AND PARTS Checking the Engine / Preventive Maintenance The following preventive maintenance will ensure long life for your Black Devil engine. Please follow the specifications in this manual when doing maintenance. Every 20 hours: Check the spark plug condition and gap (0.7 mm) Clean the air-filter, the carburetor filter placed at the end of the fuel pipe, and the filter of the fuel tank Check the torque of every bolt Tighten head nuts (in cross order) with a Torque Wrench at 2.2 Kg.meter (22Nm)

  • Page 17: Ignition Coil / Handwheel

    In case the coil and or the hand wheel must be changed, you are required to return the engine to your dealer or to a trained Cors-Air repairman. This operation can appear simple at first sight, but if performed incorrectly can alter the engine timing affecting performance and cause damage to the engine.

  • Page 18: Cors-Air M 25 Y Parts

    CORS-AIR M 25 Y PARTS 1) HEAD 24) CARBUTETTOR 2) CYLINDER 25) FLANGE AIR FILTER 3) PISTON complete with PISTON-PIN and 26) ADJUSTER FOR ACCELERATOR WIRE LOCK 27) * PINION (50 or 52.2 mm) 4) PISTON RINGS (N° pcs. 2 together with the...

  • Page 19: Cors-Air M 25 Y Electric Starter Parts

    CORS-AIR M 25 Y ELECTRIC STARTER PARTS 31) DRIVE SHAFT complete with CONNECTING 32) ELECTRIC STARTER 33) FLANGE FOR ELECTRIC STARTER 34) COVER OF BACK SUPPORT BASE 35) IGNITION 36) CHARGE REGULATOR 37) COIL 38) CROWN WHEEL complete with PINION...

  • Page 20: Cors-Air M 25 Y / Black Devil Specifications

    CORS-AIR M 25 Y / BLACK DEVIL SPECIFICATIONS The Company reserves the right to make technical and aesthetic changes without notice in order to improve the quality of the product. TECHNICAL FEATURES Cycle 2 strokes Total displacement 172,5 c.c. Bore 65 mm. Stroke 52 mm.

  • Page 21: Warranty

    WARRANTY CORS-AIR engines are manufactured with top-quality material; therefore the warranty is valid for the engine and also JPX ITALY accessories. DURATION OF WARRANTY 1 YEAR beginning from the date of sell or exit from JPX ITALY Warranty includes spare parts and labor, transport excluded.

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