Why is my karcher jet wash smoking excessively?

The colour smoke an engine produces gives a good idea of the fault: -
Black/dark grey smoke is partially burned fuel caused by the right amount of fuel being injected badly or by a small excess of fuel.

Blue/blue-grey smoke is burning engine oil.

White smoke is either steam (usually from coolant ingress) or massive amounts of unburned fuel. A few possible causes of the latter is strangled exhaust, one or more injectors stuck open or a damaged injector (broken nozzle).

If there is no coolant loss I suggest you remove the fuel injectors for testing.

definitely an oil consumption problem. How many miles? Could be worn rings and or valve guides. The oil light on when hot indicates low level or possible or weak oil pump. Check compression for possible head gasket or cracked head. I wouldn't drive it untill diagnosed.

I’m happy to assist further over the phone at https://www.6ya.com/expert/howard_977676954994c5b2

what colour smoke , correct fuel ??

check for possible excessive fuel and or oil in intake by removing air filter and looking in the throat of carburetor.

White smoke is coolant.
Black smoke is oil
Blue smoke is excessive fuel

Suggest removing the carburetor again, remove and clean the main jet plus the emulsion tube which is located behind the main jet. Look into the throat of the carburetor and find a short brass tube sticking into the venturi area a small amount. Use the flat face of a screwdriver to push down on that tube which should now fall out of the body. Use spray carburetor cleaner to wash these parts and use a toothpick to poke out any plugged holes. Make sure the fuel is fresh. Change the oil if you have not done so already. Hope this helps!

Hey mate,

What brand of burner are you running? I am a Karcher Tech but they all work on the same principle,

Your burner is getting to much diesel/kero, most have little flow swicthes on them to tell them to pump fuel or spark when there is water present in the burner coil, if this switch is faulty or getting a faulse reading then it will tell the unit to pump fuel when it is not needed and this will cause very excessive smoke for the first few mins when the burner kicks in...

If you have the excessive smoke continuously(even after 10 mins of continous use then it is probable that your fuel pump/system is running to rich, these units need regular servicing and adjustments as fuel nozzles/components wear,

There is alot of precise adjustments and checks on these units and i would reccommend getting it checked by a qualified tech, as when there is heated fuel and spark these units can be dangerous!

Hope this helps

Regards
Brad

It may be due to some water getting into the engine. I would change the gas and change the oil.

On a 2 stroke bike cause of smoke is due to excess oil in the fuel oil mixture, incomplete combustion in the cylinder or the engine oil finding it way in through the piston rings into the firing chamber. Check the oil levels and clean the plugs, which must be black in color by now, so replace if possible and if engine oil is low, the change the piston rings. Also look up the carburetor jets/nozzles are clean and the engine gets the correct fuel/air mixture by adjusting both fuel and air jets(turns)...sodeep