Coil liner problem

[Scentless Apprentice]

I just bought a new coil liner off of a local builder here in NZ, but I can't get it to run properly. For starters, I generally have to flick the a bar to get it started, and then if I touch the nipple with any kind of pressure, it stops completely rather than bogging down. If I do this a couple of times, I won't run for a few minutes. While it is running though, it runs very strong and fast, about 150hz, but at around 70% duty. I also left it running yesterday to see what would happen, it ran solidly for 12 minutes before kinda fizzling out, and then I was unable to start it for a few minutes.

I'm going to have to send it back to the builder, but I'd love to hear what you guys think is wrong with it. I have tried it on four different power supplies, with the same or worse results. All input is much appreciated

[artoftatt2]

First thing would be do not spend money with that guy anymore ..

[artoftatt2]

Spring tension and throw is probably off also check which way the capacitor is wired ..

[Eikonic]

How much gap is between the rear coil and the a-bar?
Even with a bad cap machines usually still run they just throw a lot more spark.
Does it help if you crank the voltage up?
if it has hand wound coils (without using the plastic bobbin), some times people use washers and tape the center core, when they do this the tape (usually masking tape) some times gets stressed and the coils short on the core after they heat up.

My guess is the a-bar isn't close enough to the rear coil to be inside the magnetic field of pull, prob just needs a shim under the coils....( guessing.. do to the "flick" you say you have to do to get it started)

edit. also check the contact for any foreign debri, hit the bottom of it with a small file a couple times just to clean it up. brass sucks.
I use copper or silver, cost more but worth it..

[skinmech]

Start with the basics...Poss needs de-magnetized...Hit it with the Blade of a Screwdriver......I ain't shitting you..

[vodu]

if you post a pic/video will be a lot easier to see, because just for saying could be a bazillion things....use the miracle of tecnology in your favor.
https://www.youtube.com/watch?v=a8_Ts5fMVho

[devans]

I would say to much presure on the back spring is all. The coils are strugling to pull it down. Then when you touch the nipple you add enough resistance to stop it again. But without seing it and all the gaps/pessures.............its hard to say mate.

[jesoner79]

duty cycle is too high and then tension on the back spring is too much so the coils are overworked replace rear spring and retune

[Stripe]

Start with the basics...Poss needs de-magnetized...Hit it with the Blade of a Screwdriver......I ain't shitting you..

Great trick to do with a new guy that is having a rough running machine. I give it a bang on the stainless countertop and they look at me like I'm nuts. Then their machine runs like a top. I always like to give it some time to sink in before I explain why and how it works...

[Scentless Apprentice]

Thanks so much for the input guys! Much appreciated. I definitely think the spring has too much tension, I ran the guy when I first got it, and he said it was running fine when he had it, but to send it back if I couldn't get it running. Here is a video of the machine running: