Petrol brushcutter - The spark is flooded and does not burn?! What this is about

Hello, I have a problem with the NAC brushcutter (2t). The candle is flooded, the spark is and it does not burn, the spark is very strong, I don't know if it is important but its color is mostly blue. It feels like a half-length cutter is lighter to walk. Once he fired and I thought that the end of TORRET with him and nothing here ... still does not want to start. Compression is because today all seals and the piston with the cylinder were replaced. I have the impression that the spark is too late, as if it appears when the piston is at the bottom and not at the top. Thanks in advance. I hope you will help me

Check that the wedge has not broken.

DriverMSG wrote:

Check that the wedge has not broken.

Not...

Miracles, miracles, everything is burning ...
Did you water the fuel for the candles?

bearq wrote:

Miracles, miracles, everything is burning ...
Did you water the fuel for the candles?

Yes, and more than once she growled something and that's all ...

then you need to set the ignition.

korek123321 wrote:

bearq wrote:

Miracles, miracles, everything is burning ...
Did you water the fuel for the candles?

Yes, and more than once she growled something and that's all ...

So either there is no spark in the cylinder or the ignition is completely adjusted. Even with bad ignition it should walk, lame, but it should.

mechanix wrote:

then you need to set the ignition.

How to set it up?

in the manual it should be stated how many mm. a spark should appear before the upper position of the piston. Set it as in motorcycles, etc.

mechanix wrote:

in the manual it should be indicated how many mm. a spark should appear before the upper position of the piston. Set it as in motorcycles, etc.

There is only a gap in the candle between the electrodes in the manual. : /

the easiest way is to take a piece of metal rod. Twist the candle. Insert this rod in the hole for the candle, and turn the magnet wheel until the piston is at GP. On this rod, mark this point as 0. Start with 3mm. in front of the piston GP. If it still does not light, reduce the number of mm. Does this engine have electronic ignition because we know nothing about it?

There is nothing in the manual about setting the ignition because it is not regulated. The fact that the spark is on the twisted candle does not mean that it is under pressure. Old fuel can also upset your nerves.

Sure it is not, because the coil is permanently screwed there, and thus the ignition is constant.
So we are left with a spark that is missing in the cylinder ...

mechanix wrote:

Does this engine have electronic ignition because we know nothing about it?

No, I dug up the model of this scythe in the papers, maybe it will be easier NAC WLBC430-2ZXU

mechanix wrote:

Does this engine have electronic ignition, because we know nothing about it

Have you seen a scythe with electronic ignition?

bearq wrote:

So we are left with a spark that is missing in the cylinder ...

Exactly....

Added after 17 [hours] 8 [minutes]:

What no one will help me anymore?

How can we help you, you know the probable problem then?

Have you checked all these tips practically?

bearq wrote:

So we are left with a spark that is missing in the cylinder ...

Or there is a spark but too much fuel is getting into the cylinder flooding the spark plug.

Either when replacing the cylinder and the piston, the piston was inserted the wrong way round or the rings broke. If the fuel is coming (wet plug) and there is a spark, it remains to measure the pressure in the cylinder, which may be too low.
Have you purchased the piston and cylinder as a complete set or separately?

read this topic, lighten up a little - Constantly breaking rings

Staszek49 wrote:

Have you purchased the piston and cylinder as a complete set or separately?

I put everything on well. It was complete.

Added after 42 [seconds]:

mechanix wrote:

Have you checked all these tips practically?

Yes

korek123321 wrote:

DriverMSG wrote:

Check that the wedge has not broken.

Not...

Maybe you have a carburetor out of control or a problem with the suction, I recently somehow wanted to start a warm engine on the suction in DEMON. I did not tear a lot of my hand, I did not pull it out, maybe 60 times ... it even bounced a few times hahahah, as it turned out the choke lever was on it, I set it as needed, pressed the pump 3 times and fired with a kick .
Also sometimes crap poisons life, but you should really take a look at the carburetor, they are easily disrupted, and it is cold ass ... You should have in the manual how to set it up ...

I also had a problem with firing my NAC scythe recently. The problem was a broken hose supplying fuel from the tank to the carburettor. There was also a spark and the candle also apparently looked wet.
The second thing that made my life difficult when firing this scythe was a wet, oily air filter (sponge), which significantly impeded the air flow. By the way, I don't know why, but this filter, despite the fact that I clean it regularly, will occasionally be splashed with oil, which with fuel backs up from the carburetor.

ATTENTION ATTENTION I want to announce that the scythe works ^^ BUT I don't know whether to be happy with it or not. Namely, the scythe only fires in the WORK mode. And the choke does not want to start (as far as I know, the engine fires cold on the suction or not?). When I start in WORK mode and change to suction, it goes out as if I would completely cut off the air, but there is such a small hole. In June, it normally fired on the suction ... . Just let it work tomorrow as well . Is this how she should fire? I don't know what was the cause, but it works. THANKS All for your help

korek123321 wrote:

ATTENTION ATTENTION I want to announce that the scythe works ^^ BUT I don't know whether to be happy with it or not. Namely, the scythe fires only in the WORK mode. And the choke does not want to start (as far as I know, the engine fires cold on the suction or not?). When I start in WORK mode and change to suction, it goes out as if I would completely cut off the air, but there is such a small hole. In June, it normally fired on the suction ... . Just let it work tomorrow too . Is this how she should fire? I don't know what was the cause, but it works. THANKS All for your help

So, as I wrote on the choke, it is often impossible to start and sometimes it goes out immediately, after turning off the choke, you will start it without any major problem.

As I wrote earlier, the carburetor to adjust.

>>17287182
Hi, mine is like that. Until it spits fuel like unscrewed spark plugs.

My NAC had sudden death syndrome. I finished mowing one evening, and wanted to finish the next - and NOTHING. I jerked until my elbow hurt, and zero response. Characteristically it fired up on open throttle, with no suction, and with fuel pumping continuously. Interesting. I found a carburettor on a well-known website for 21,50 PLN (excerpt from the description ... Japanese carburettor) where there were only enthusiastic reviews, of the scythe resurrected type. I thought, what's the harm in trying it, either it will improve something or not, 50%. I carefully installed the new carburettor, being careful not to cover the tiny grommets with the gasket.
Well, and the scythe was resurrected - a really big shock. I don't think anyone will answer why, but that's the fact. I added a long enthusiastic review to the offer, as I was already mentally prepared to buy a new scythe.
>.