Honda 5hp stationary engine blows milky oil in to air cleaner

Gray fluid is usually indicative of old oil with water mixed into it. First you have to determine if the fluid is coming out of the motor or pressure pump. Then change the oil in that, or both, and then watch the condition of the oil when you use the washer. With new oil, it won't turn gray but will get a milky coloration to it. There shouldn't be any way for water to get into the motor oil short of the engine being sprayed directly with high pressure water. If water is getting into the pump oil you'll have to check the seals inside the pump.

Hello
You may have a clogged main jet in the carburetor, remove the engine shroud to expose the carburetor, the carburetor will be held on in most cases by tow bolts and then a basket underneath, remove the carburetor and flip it over in a rag to catch the fuel, then remove the screws holding the fuel float bowl on, carefully work the bowl loose to avoid tearing the bowl gasket, if you do damage it you will need a carburetor repair kit. Once the float bowl is removed remove the floor and the needle valve at the fuel inlet, set them aside, using a can of spray carburetor cleaner spray the inside of the carb and then blow through the jets with compressed air to dislodge the dirt (this is a must) that is obstructing fuel flow and causing the lean stall out, reverse and reinstall you should be good to go.

Yes it is always a good practice to bleed the tank down. there is a check valve in the top of the receiver tank that keeps air from blowing back Thur the system. However if it's leaking you will have pressure on the oil sump. As for type of oil use a 30 weight non detergent oil. Recommend using ir's t30 all season or another type made for air compressor's.

Very rare to have problems with rings. Blow-by would produce high pulsating pressure in the crankcase causing oil to blow out the oil filler plug/ dipstick. If normal crank pressure, suspect problem with valves or gaskets. Remove air filter cover and check for air blowing out of intake or very hot head or air discharge tube. Leaking valves or blown gasket will cause low volume/ low pressure and hot discharge air. Remove the in-tank checkvalve and look for carbon deposits /debris build-up. If the checkvalve and the interior or discharge hose are coated with oil deposits /carbon, most likely problem is valve plate/ gaskets /head. Good luck with your repair.

Oil in the air lines indicates you have air pump problems; either worn or broken piston rings or badly scored cylinder wall(s), usually both. You'll have to disassemble the air pump or take it to a service center to find out what's wrong inside pump.

Warm it up with a heat lamp, hair dryer etc. Release all air pressure from the tank first. Check your oil and use only compressor oil.

to have milky oil it means water has mixed with oil

The IAC, (Intake Air Control valve) is a rotary valve that binds with carbon build up. the valve is usually on the bottom of the throttle body, has two small coolant hoses going to it.

call up karcher and tell them your problem