Hello,
I am having some issues with my "70cc" Chinese 2 stroke. So, starting is a pain. I have to pedal with the clutch engaged for at least 200m or 300m total until the engine starts to show signs that combustion is happening, then two attempts later the engine does indeed start. The carburator e-clip i have set to both "low" and "high" positions for rich and lean fueling until 3/4 throttle, but the results are the same. The carburator is the NT Speed, the one with the red back. The spark plug was black and filled with weird fluff when i removed it. It also was black when the c clip was set to lean fueling. I am suspecting i added too much 2 stroke oil to the premix, since i forgot to measure if the gasoline i added really was one liter. The red back I have removed to add airflow, but i get the same issue. Also, the engine begins to die after 20min of operation. At full throttle, it bogs down. At 3/4, it runs best and achieves the highest speed.
To summarize my setup:
- NT Speed Carburator, stock, back removed
- C clip currently one level under leanest setting
- Fuel may have contained too much oil, yet I have also topped it up with fuel without any oil in it, and I have the same issue.
- Running the engine dry, with petcock closed, then turning the petcock on and pedaling leads to the same starting issues, so I don't suspect flooding.
If I kill the engine, it might start again easily without much pedaling, but if I wait 5 minutes, I have to pedal as much as starting with a cold engine.
I would like to thank everyone who took the time to read this, you are all great people.
I am having some issues with my "70cc" Chinese 2 stroke. So, starting is a pain. I have to pedal with the clutch engaged for at least 200m or 300m total until the engine starts to show signs that combustion is happening, then two attempts later the engine does indeed start. The carburator e-clip i have set to both "low" and "high" positions for rich and lean fueling until 3/4 throttle, but the results are the same. The carburator is the NT Speed, the one with the red back. The spark plug was black and filled with weird fluff when i removed it. It also was black when the c clip was set to lean fueling. I am suspecting i added too much 2 stroke oil to the premix, since i forgot to measure if the gasoline i added really was one liter. The red back I have removed to add airflow, but i get the same issue. Also, the engine begins to die after 20min of operation. At full throttle, it bogs down. At 3/4, it runs best and achieves the highest speed.
To summarize my setup:
- NT Speed Carburator, stock, back removed
- C clip currently one level under leanest setting
- Fuel may have contained too much oil, yet I have also topped it up with fuel without any oil in it, and I have the same issue.
- Running the engine dry, with petcock closed, then turning the petcock on and pedaling leads to the same starting issues, so I don't suspect flooding.
If I kill the engine, it might start again easily without much pedaling, but if I wait 5 minutes, I have to pedal as much as starting with a cold engine.
I would like to thank everyone who took the time to read this, you are all great people.