Starting with what is now post #31, I merged your new thread with your earlier one. Starting a new one dealing with the same basic topic makes it almost impossible to keep track of what's already been done. Please keep your posts in this thread till your issue is resolved. Thanks for...
You can also find BDC by turning the flywheel side to side. When you feel resistance on the left, go the other way. When you feel resistance on the right, bring it between those two points. The resistance is the piston going into the cylinder and starting the compression stroke. Half way...
Make only slight adjustments and do it ONLY when the engine is warmed up. After each adjustment, run it around a little just to clear it. If it is improving, continue to adjust it SLIGHTLY in the same direction and again, run it a little to let it settle in to the new setting. When it idles...
Chances are you only adjusted the HSN (High Speed Needle). The LSN (Low Speed Needle) is what you need to lean to control idle and throttle from a stop.
Read through the following thread. Lots of useful info in there. If it's hard to start due to compression you can also loosen the glow plug...