My best guess is that you are having trouble with the pipe. It’s sucking like crazy but the return pulse is not hitting correctly. Which is why it just falls flat. The return pulse pushes all that fuel back into the cylinder but the timing of it appears to be running late. You could try shorting the pipe 1” at a time. Only shorting the first section that bolts onto the cylinder. I found 6 to 7 inches long to be about the sweet spot on all the ones I have done so far. That’s about 13,000 rpm in the cut. Don’t worry about the direction the pipe is going or how it looks until you get the sweet spot. After you find the sweet spot do pie cuts to shape the pipe.
@@IndianaDoug It has a lot to do with timing and the volume of air available inside the engine. Larger engine and the pipe will need to handle a larger volume of air as well as needing to have the timing of the pipe working with the engine. You can try tuning it but if you are having trouble getting it to work then something is short circuiting in the timing. I would recommend not doing a lot of testing trying to fatten the carb a little at a time. Start with the carb tuned as fat as you can then lean it out as needed. If it still has trouble don’t keep trying. It can suck all the fuel out the pipe and basically cause the engine to run without lubricant. Just tune it really fat and if it goes lean just stop and work the problem. I would hate to see you score up the cylinder. Be careful with how much you test in these situations. I learned this lesson the hard way.
@jasentonguepowersaws4206 Tanton suggested raising the arm a bit too. I have a dual jet oem carb being built by LaVanway, just trying to get this one to work until I get it.
No. The carb can’t keep up with the demand. It’s 120cc, ported, unlimited ignition, piped, chainsaw. The demand for fuel and air is MUCH greater than stock. I’ll get it sorted though.
@@IndianaDoug ya I understand it's still being prototyped and it's not in production yet I wasn't being an asshole about it l was just joking with you. Sorry for the misunderstanding.
I apologize then man, hard to tell. Neotec’s stock version is fine for cutting firewood like I demonstrated in the first couple of videos. But now I’ve modified it. So any running conditions is not their fault.
