Why doesn't soap come out of my Karcher 1750g gas pressure washer the soap will not come out thriugh the tube

can't solve this but can you solve why mine leaks oil all the time?

I posted an answer to no soap on the Karcher Factory-Reconditioned 2,600 PSI 2.3 GPM Gas Pressure Washer G 2600 VHR. Same machine I suppose, but use the black 65 l degree low pressure nozzle.
It's in the manual , I missed it and had a hell of a time trying to figure it out. If that doesn't work check the check valve on the pump(Where the soap hose is) , see if it's gummed up.

Be careful taking it off there's a spring and ball bearing in there.

On pressure washers with cleaning solution pick-up hoses you have to make sure you are using the black, low pressure, soap tip. If you are using the high pressure tips, red, yellow, white or green, there will be too much back pressure at the pick-up tube for it to work properly. If you are using the soap tip, check that the pick-up tube and filter are clean.

with most pressure washers, the soap is mixed before the pump. in order for this to work correctly you must use the black spray tip. It is much larger then the others and delivers the soap at a much lower pressure. put the soap tube in the soap solution and it will be drawn up and out the tip.

You will need to adjust the pressure to low pressure by adjusting the lance. This way the machine will draw chemical at low pressure.

It must be set on NO pressure. If it has exchangeable tips, it is the black one. If the end of the soap tube looks like THIS, (#5) you may need to twist it to open it

Two nozzels came with your washer one has a cone shaped head, the other one is blunt, attach the blunt one to the trigger. You will notice on the barrel of the nozzel it says "mix" turn the indicator line to "mix" and it should work. This is a very low pressure setting and is used to "apply" the soap only. You cannot despense soap in the hight pressure mode.

Dear johnny_river,
In general there are many causes why soap is not sucked. In a domestic and various other machines the soap is only sucked in low pressure. So one thing you can try is remove the nozzle or the complete lance from your gun. This will give a low pressure. If you attach a pipe directly to the machine soap inlet, and soap is not sucked, than the soap valve is "stuck closed" with soap. It is important that one must work with fresh water after using soap. This to flash the system from any soap left. So in a few words attach a pipe directly to the nipple at the machine and use low pressure. Important , you do not have to use soap to test....use fresh water. If this works( which it should)...than service the flow control tap or change it altogether.
Regards,
fulltech.

Dear Pajodi,
I just came across your problem. I have just joined FIXYA, and solved various Karcher problems. First of all with all respect, the shop from where you bought the machine, must have told you all necessary instructions to operate your machine.
Now the soap always works on low pressure. So if you have a variable lance, turn it to low pressure. You can also remove the lance, and the soap will surely starts to work. With turbo lances, the soap system does not work. This concludes that the soap does not work when high pressure is used. Bigger machines do spray soap at high and low pressures. But these have regulating knobs, to swith off and on, the soap supply.
Regards,
MG.

If there is a check valve in the little line that you put into your soap tank, it doesn't need primed. I have very large 5000 psi units and have enough suction without one. If you can't get it going, you can always remove the hose end near the pressure washer end and fill it by immersing the tubing in the soap, but that shouldn't be necessary. Sometimes the little fitting with the check valve in the bottom get plugged up as well, so that might be your problem. Hope this helps you, Rick