I purchased a karcher HDs 5/11ux jet washer but when I came to use it after 5minutes a big puff of smoke came out of the chimney of the burner it looked as if diesel or oil had got in to the burner

SOURCE: karcher HDS 750 HOT HIGH PRESSURE WASHER

G-day Mate.

Did you check if the igniters? they may be cloged up with ****. Unscrew the Sight glass on top of the boiler and run the machine (in cold or hot mode, doesn't matter, as the igniters are running all the time) and see if there are working, you should take them out anyway and give them a wipe with a rag as general maintenance item, and when you put them back in there should be about 5mm gap between them.


Less common reasons for the boiler to not work
- Faulty fuel solenoid valve, (You should hear a click sound about 5 - 10 seconds after you pull the trigger)
- Dirty fuel filter,


Take a look at those simple things and let me know if its any of these.

I have a Karcher HDS 750 1989 Year model

This machine just keeps going, it's had a fairly tough life but it has stood up to it all,

i hadent spent anything on it until about 6 months ago when i purchased a new fuel pump for it as the old was wasn't pushing 170PSI to the Disiel injector it had slowly droped 70psi, and it doesn't create a hotter burn in the boiler, but still very good for a 19yr old pump,

other than that thats all it's needed, it's still going strong to date
Very robust machine.

my e-mail is [email protected]

Cheers Matt.

SOURCE: where can i put lubricating oil for karcher jet wash machine

It sounds like you are referring to the oil in the swash plate housing. You can use a multi grade motor oil such as 20w50 or 10w40. Fill to about half way over the swash plate. If the old oil has gone amilky colour, please replace the oil seals first.

Testimonial: "post was very helpful and i am going to replace o ring rubber seal where i suspect oil is leaking and also fill it with oil.Thanks very much"

Jerry Magee

• 232 Answers
• Posted on Nov 10, 2009

SOURCE: Reddy Heater R40 starts , then within a few

The R40 has an on board computer with a photocell that views the flame color. If the photocell does not like the color of the flame, then the heater shuts down....within 5 secs.
Your problem could be:

1. the air pump pressure incorrect..
2. defective electronics.
3. restricted fuel supply.
4. air leak in air line or fuel line

SOURCE: just bought a used karcher hds 500ci every now & again

you burner assy needs to be cleaned , spark electrodes properly gapped and the fuel pump pressure set , the chemical pick up often gets clogged , and the chemical valve ( pump side becomes jammed ( a small ball bearing jams in the seat )
also clean out the diesel tank and clean or replace the fuel filter , if the smokes is white thats caused by water in the fuel , black smoke is too much fuel going to the burner assy or your ignition electrodes not igniting it

SOURCE: surges then a big puff of smoke and it shuts down

Surges then a big puff of smoke and it shuts down