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A rotary engine, also referred to as a Wankel engine, is a type of internal combustion engine. Rather than using reciprocating pistons found in a conventional engine, a rotary engine utilizes rotors to convert pressure into a rotating motion.
Here's a basic breakdown of how a rotary engine works:
1. Intake: During the intake phase, the engine draws in a fuel-air mixture into the housing. This is achieved as the rotor moves away from the intake port, increasing the volume and reducing the pressure in the chamber, hence sucking in the fuel-air mixture.
2. Compression: As the rotor continues to move, it compresses the fuel-air mixture against the wall of the housing.
3. Combustion: When the fuel-air mixture is compressed to a suitable pressure level, a spark plug ignites it, causing an explosion. This explosion pushes the rotor around, generating power.
4. Exhaust: As the rotor continues to move, it also pushes the burned gases out of the exhaust port, leaving the chamber ready for the next intake of the fuel-air mixture.
It's important to note that while rotary engines are generally lighter and more compact than conventional piston engines, they can be less fuel-efficient and generate higher emissions.
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Adjusting a carburetor on a 2 stroke engine can be a technical task, but essentially there are three main adjustments to be made: the idle speed adjustment, the low speed mixture adjustment, and the high speed mixture adjustment.
Here is a step-by-step guide:
1. Warm up the engine: Let your engine run for at least 10 minutes to reach its operating temperature. This will give you a more accurate adjustment.
2. Set the idle speed: Locate the idle speed screw, usually found next to the fuel bowl. Turn the screw clockwise to increase idle speed, and counterclockwise to decrease. The ideal idle speed is around 1,500 RPM.
3. Adjust the low speed mixture: Find the screw labelled "L" or "Low". Gradually turn this screw clockwise until the engine starts to sound rough, then slowly turn it back (counterclockwise) until the engine runs smoothly.
4. Adjust the high speed mixture: Run the engine at full throttle. (Make sure this is safe to do in your situation). Find the screw labelled "H" or "High". Slowly turn this screw clockwise until the engine starts to slow down, then gradually turn it back (counterclockwise) until the engine runs at maximum speed without the sound of being "out of breath".
5. Repeat adjustments: Go back and forth between adjusting the idle speed, low speed mixture, and high speed mixture until the engine performs optimally at both idle and full throttle.
6. Test drive: After making these adjustments, give the vehicle/engine a test drive to make sure it performs well under different operating conditions.
Remember that this is a general guide, and the precise locations of the adjustment points can vary significantly between different models and makes of engines. Ensure that you're familiar with your engine and refer to your owner's manual before making any adjustments.
Also, pay close attention to any signs of discoloration on the spark plug since it is an excellent indicator of an improperly tuned carburetor. A carbon-fouled plug (dry, black) might indicate a too rich fuel mixture, while a whitish plug might point to a mixture that is too lean.
Please be aware, adjusting your carb is often just maintaining and occasionally fixing. If your engine has other issues this may not fix them. Always verify with a professional if you are unsure.
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