20 Most Recent Devilbliss DeVILBISS Devap DVH2600 Gas-Powered Pressure Washer Questions & Answers

you have a faulty presure relief valve. it is building up presure and killing the engine.

It is not adjustable, it's set from the factory

you have to use a large tip in order to get soap and also check to see if the soap hose inlet is open

It's possible that the 'unloader' in the pump is plugged. A local small engine repair shop can replace it (generally under 50 bucks). Of coarse you have the hose hooked up to it and the water on.

It could be the valve(s)

yes pump can be taken apart but when you do it will be to your best interest to rebuild with new valves and o rings. Be sure to check the housing and make sure it isn't cracked. If it is cracked throw it away and get a new pump.

No it is a 4 cycle engine and does not use mixed gasoline.

i have a honda power washer EXHA2424, I replace new spark plug, new gas., cleans the cabureetor, and it still won't start please advice me what to do

take the pump apart and free up the sticking internal valves

To evacuated the oil from what I believe is the gas cap area, you are going to need some type of a siphon pump to remove the oil. A total engine tear down might be needed depending on where all the oil is. Remove the spark plug, and turn the engine over, if you are getting oil coming out the spark plug hole, then you are going to have to either tear down the engine, or leave the engine sitting in a way that you can drain all of the oil out of the system.If no oil comes out of the spark plug hole, then you should be good to go once you siphon out all the oil

It may be your engine, but it may also be the water pressure. Try this: Hold the trigger down while pulling the recoil starter. This acts as an unloader for the pressure washer, and may allow the engine to turn over. There is also an oil level in the pump as well as the engine. Check both levels.
Just a thought, but I've been there. Best regards, W/D

Make sure you are holding the trigger and water is spraying while you are trying to start it, otherwise pressure will build up in the pump and it will kick back.

Hi there mburns44 i believe your problem is either that either the Air/Fuel mixture is too rich and causing it to flood or you have clogged jets. carburators are tricky and often times need to be cleaned or adjusted by a professional. I hope that this helps :)

The pump on this unit doesn't use oil so you won't have to worry about the oil on that.

The engine oil can be changed though and is very easy to do. If you look to where the engine is mounted to the frame of the machine there is a oil plug on the bottom side that you can remove with a 12mm wrench. You are going to want to have something to catch the oil under the machine, I would recommend a gallon of milk with the top cut off.

A couple of things, what makes the engine change tone and revs is pressure, depending on the age, it may have excessive calcium build up in the pump, there may have also been a build up of crud or a wasps nest in the end of the hose when you connected and is now in the actual pump, you can remove the base and flush the sytem, hope this helps the problem, good luck.

These pumps are notorious for seasonal problems.
Tip the unit to the point you can pour engine oil into the water inlet connection. What your attempting to do is free up the ball seats in the pump. They get corroded when they sit and lock in place. Adding the oil or a vast amount of WD 40 to the water inlet often does the trick for loosening up the seat balls and springs.
After you add the oil (3 - 4 ounces) or WD 40 to the water inlet line just slowly pull the engine through with the ignition switch off. As the water inlet cavitates add more oil.
Let it sit over night and then take a block of wood and a hammer and tap on the power head. Don't over do it and do it in such a manner your not going to shear off any bolts or break anything. But... be serious with the hammer and block of wood.
Then connect inlet water hose, the pressure hose and test the unit. You may want to purge the oil lubricant into a bucket before you start the engine.
Give it a try and see what happens.

Thanks for using FixYa,
Kelly