NAC dy164pmb Lawn Mower: High RPM, Regulation Issues & Noise - Manual Adjustment Possible?

Hello
I have had NAC dy164pmb for 9 years.
For some time in my opinion has a very high turnover. High enough that I can mow in the Start position, i.e. with suction.
I took everything I could but the turnover was still high.
Is it possible to manually reduce its turnover? Because on such high it's fear to mow, I'm afraid that in a moment something will break or break. In addition, it makes a lot of noise.
Possibly what could be the reason for this.
I think the film illustrates this well:
https://youtu.be/2Cr_73zPerE
And this is what the cable looks like in the movie.

The gentle ringing comes from a spike and is unrelated to the above.

Hello,
Use at such a turnover is risky.
The engine will not last long.

I do not have such a mower, but it needs to be adjusted,
from the video you can see that you can reduce turnover manually,
there I would look for the option of moving the lever so that the final turnover was lower.

maybe here you need to change:

In my opinion, the engine gets too little fuel.

mark-l wrote:

I can mow in Start position, i.e. with suction

It is difficult to refer to the scope and quality of work in the statement:

mark-l wrote:

I took everything I could clean

but I would suggest refueling the fuel system.

1 / remove the fuel hose in front of the tap and observe the appearance of the fuel stream;

2 / disassemble the fuel tap and clean it;

3 / unscrew from the engine and disassemble the carburetor. In addition to the elements available after disassembly of the settler, it would be necessary to take care of the plastic fuel nozzle in the upper part of the carburetor and the patency of the channels in the carburetor body. This nozzle is accessible after removing the plastic screw regulating the position of the mixture damper.
It is worth remembering the number of turns of the screw being removed. The nozzle must be pulled out - it is pressed into the carburetor lid on the o-ring. A good solution would be to hand the dismantled carburetor body for cleaning in an ultrasonic cleaner to a service center.

As for adjusting the position of the speed regulator lever, about which col. @ dylus1 , you can verify the need for this operation. Well, if with the engine off the mixture throttle is maximally open, it's all ok. If it tends to cover the carburetor throat, then first examine the condition of the pull rod and the spring, and only finally we adjust the position of the above lever.

Czyżycki wrote:

In my opinion, the engine gets too little fuel.

mark-l wrote:

I can mow in Start position, i.e. with suction

the plastic fuel nozzle in the upper part of the carburetor should be taken care of and the patency of the channels in the carburetor body. This nozzle is accessible after removing the plastic screw regulating the position of the mixture damper.

Shot in 10
Man has a lawn mower for so many years and was not aware of its existence. I took it out, washed it, blew it and it works. In addition, I had to slightly bend the cable from the speed control because despite the fact that it was popping nice when it was slow, it went to the maximum on working ones.
The throttle is now half closed.
Thanks again for your interest and help.
greetings