ORIGINAL: serious power
Hi Charley,Atul,
Combustion in simple glow 2 strokes is very inefficient.
To make fuel mix changes and get the engine to reflect the change in its performance you would have to change the plug,crank timing and pipe timing to specifically suit the new mix.Not at all practical.So with 2 strokes we get the best compromise of prop/fuel/plug and pipe length for the particular 2 stroke we are dealing with.
Brian
Brian: you make a very good point about 2-strokes. My JETT 76 reacts differently to 15% fuel depending on the muffler installed. With the non-tuned muffler, the engine runs fine but at about 700 RPM Less than with the tuned muffler. However, with the tuned muffler, the transition is not as smooth. I wonder if others have experienced differences with different mufflers on 2-strokes.
The YS-engines though do seem to love 30%. There's a big difference in the way the engine behaves between 20% and 30% fuel.
Atul