Question about Karcher 2500 PSI Pressure Washer

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Engine will not run

Put gas in air filter box engine will run for short time. gas is flowing from fuel shut off valve ok. when i take the hose off the carb. and try to start the engine no gas is coming out of the hose i think the problem is the fuel pump am i correct or is there a different problem. please help me thank you joe

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There is no fuel pump it's purely gravity feed. At the bottom of the carb should be a bolt with a nut on it loosen the nut and start backing this out it is actually a needle valve and they frequently get corroded and need to be cleaned. Fuel should be coming out of the bottom of the carb, reinstall it and try again. If it's still not working your float may be stuck, or your carb is gunked up. I'd pull the carb get a carb kit and rebuild it. It's about a twenty minute job. Or take it into a mower shop and have them do it if your not comfortable trying. Gas won't flow out on the cylinder side unless you have a problem gas has to be sucked out of the carb by the negative pressure in the engine.

Posted on May 12, 2009


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Car idles fine, but sputters, bogs and dies if gas pedal is pressed.

new spark plugs this decade. (a tune up?0
the filter is part of all 60k tuneups. letting it clog wrecks good pumps.
my wild guess, its lack of fuel flow, do to old filter.
or low fuel pressure.
car is identical to a Corolla. so is not unique or rare as some Geo cars are.
the cam belt not changes, invites valve kissing piston tops. BOOM
end of engine. (costs more to fix then worth of car)
the word is bogging, my engine bogs
if if bogs WOT (wide open throttle) and dont catch up < ITS NOT THE TPS. ever.
tps bad causes short bogs, called hesitations.
The map sensor , is what measure air flow and the ECU matches fuel to this air flow.
my guess, is it does that, but fuel pressure is like 15PSI, bad.

Apr 14, 2015 | 1995 Geo Prizm

2 Answers

Gas will not flow from tank to filter

Check for a fuel shutoff valve in the fuel line. Many manufacturers have them to allow the users to run the carburetors empty at the end of the mowing season. It is easy to forget about.

Apr 11, 2015 | Garden

2 Answers

Does anyone have a wiring diagram?

you have 3 safety switches usually,if you would of had the make and model,i couldve got you a manual,anyways,there is a seat,deck and neutral switch if any of those go bad it wont start,to find out if it is a safety switch,unplug the thin wire that goes to the coil,it should be black,try to start it,if it starts,it is a switch,if it doesnt then the coil,points or plug are bad

Apr 08, 2015 | Garden

1 Answer

Have a stay running problem

Informative post, well done; for a more tailored answer include the Make/Model/Year/Engine Model/Deck Size.

A mechanically functional (meaning all the internal parts are working, i.e. pistons, valves, etc) engine requires 3 things, compressed air, fuel, and spark; all at the right time.

Based on the newness of your machine and the very short run time (minutes, with 24 hour recovery), I would start with tracking down a fuel problem. Due to the low hours there should not be a compression or spark issue. First I will share my standard process of elimination for fuel problems.

Tracking down fuel problems.
  1. Make sure there is plenty of fresh fuel in tank. High Octane less than one month old. Water in the fuel system will often cause hard starting, low power, backfiring, surging or stalling.
  2. Is there a cut off valve at the gas tank? If so check that it is open or working if it is electric. (No cut off at tank on the D140)
  3. This step comes from repeated personal experience with JD gas tanks. Remove fuel line from filter and remove the filter, gas should pour out of the hose coming from the tank. (Look at the filter before removing it; it should look ¾ full of fuel. If it's not that's a clue to fuel flow problems) If gas does not pour out remove the gas tank cap. If fuel flows now, you need to unclog the cap vent or replace the cap. The vent is that tinnnny little hole in the center of the cap. If the fuel still does not flow then blow air from the filter end of the hose back up through fuel line to blow out any blockage inside the gas tank. Do your self a favor, leave the gas cap off and turn the outlet air on your compressor down below 20 psi. If the tank is nearly full you will blow gas out of the tank. Do this outside if possible; at the very least you need a well ventilated area.

    After blowing air from the air filter back to the tank, you may have to reverse the process and pressurize the tank to get the fuel started. I place my hand over the open tank and hold the air hose between the joint of my thumb and forefinger to seal the tank, and then squeeze the trigger. Once you have a good fuel flow out the line to the filter, put on a FRESH FILTER. Try cranking the engine. If it still does not start move on to the fuel pump and carburetor.
  4. Check the fuel pump.The fuel pump system on the twin Koehler and the Twin Briggs (and others) are almost identical. Watch this excellent, eight minute, video to learn how to check the fuel system, including the pump, up to the carburetor. . Small Engine Repair Checking Vacuum Fuel Pump Fuel System on Kohler Twin...

  5. Note: My engine was starting hard (sometimes not at all) and dying in the field this year. While doing a valve adjustment, I found a hairline crack in the bend of the vacuum hose powering the fuel pump. It's the short hose running from the valve cover to the fuel pump. The fuel pump will not work if this hose is cracked.
  6. Many systems have a fuel shut off solenoid. This is a small cylinder on the bottom of the carburetor. It has two wires running to it. It should make an audible click when you turn the key on. If it does not click you will have to replace it or track down an electrical problem.*
  7. If this has not solved the problem you may have to remove and disassemble, clean, or rebuild the carburetor at this point. You may have water, dried fuel (varnish) or trash in the carburetor bowl. Before removing and disassembling the carburetor try draining the bowl. Or, take the bowl off, careful not to drop the small parts inside. Clean the bowl and replace. I often remove the bowl on small engines and save the hassle of a complete carb removal.

*NOTE: Connect a volt meter across the two battery posts. If battery voltage drops below 9 volts when cranking or while the engine is running, the fuel cut off solenoid will not function. That means the engine will not start or will die soon after starting. So check your battery voltage before, during, and after cranking. If the battery voltage is good before but drops below 9 volts while cranking this is generally a sign the battery has one or more bad cells. Replace the battery. If the battery is in fact good, and the voltage is still dropping, you may have a bad starter motor which is drawing too much amperage.

If you find this fuel checkup does not solve the problem, repost your question with updated info and I will walk you through the next step.Tracking down a spark problem; yes, your problem could involve the coil. (Not as likely as fuel)
Small Engine Repair Checking Vacuum Fuel Pump Fuel System on Kohler Twin...

Mar 27, 2015 | John Deere D140 22HP V-Twin Foot Pedal...

2 Answers

Is a subaru outback 2002 2.5 engine, hard to start cold and running rough under acceleration stall when push accelerator pedal and sometin]mes die no power. codes P0171 and P0130

Check the following items:
1. good clean air filter?
2. no leaks in the air filter box, cover closed properly?
3. connecting hoses attached to the air box properly?
4. pcv valve working correctly?

1. Change the air filter if you don't recall the last time it was done. I record the mileage on filter with a permanent marker. Put it in a location where its visible with the air box opens. Change the air filter every 2 years or 30000 miles which ever occurs first.

2. Ensure that the two parts are aligned properly and that all the clamps and hoses all fit correctly. A good way to find vacuum leaks is to use vaseline on the ends of any poor fitting hoses. Do one at a time and you can isolate the problem hoses.

3.The two vent hoses that attach the valve covers to both sides of the air box can become loose with age. Adding some screw clamps can solve a small leak. Replace the hoses if they are hard and dried out. Also inspect the throttle body connection part of the air box for loose clamps and fitment.

4.Pcv test is pretty simple. Start the engine, open the oil cap, then hold a piece of paper over the cap. If the pcv is working the engine vacuum should try to suck the paper in. If the vacuum is weak then clean or replace the pcv valve.

If the all the above checks are good then its time to replace the front oxygen sensor.


Dec 18, 2014 | 2002 Subaru Outback

2 Answers

Fuel problem with John Deere 23hp engine

time to pull the hose off the fuel pump coming from the tank and drain the tank and check flow of gas coming from tank hose, and possibly inline fuel filter is plugged or there is junk in your tank/line from tank not letting enough fuel to run to pump so pump can pump it to carb !

May 15, 2012 | Briggs & Stratton Briggs Stratton...

2 Answers

My truck act like its not getting gas when i press the gas and then when i am stopped at a light it acts like it want to cut off until i put it in park. i need help on what it can be.

If your check engine light is not on, it could be your fuel filter. I would check this first. The fuel filter is easy to change and is cheap. Usually only costing a few bucks. It is located shortly after the fuel tank on the fuel line running the length of the steel frame.

Nov 02, 2010 | 2001 Ford Expedition

1 Answer

OBDII SETS CODES P0401, P0171 & P0174 . 1998 Mercury Sable

P0401- Exhaust Gas Recirculation Flow Insufficient Dectected
Possible causes - Harness or connectors (EGR volume control valve circuit is open or shorted.)
- EGR volume control valve stuck closed
- EGR volume control solenoid valve
- Dead (Weak) battery
- EGR passage clogged
- Exhaust gas leaks Possible solution - Clean EGR Valve
- Repair EGR harness or connector
- Replaced EGR volume control solenoid valve
- Replaced EGR volume control valve
Code P0171- Fuel Injection System Too Lean Bank 1 Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem P0174- Fuel Injection System Too Lean Bank 2 Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.

Jun 28, 2010 | 1998 Mercury Sable

1 Answer

My riding lawn mower won't start. New battery (cables & connections are clean), new filter, plug, rebuilt carb. It's getting spark but won't start? I cleaned the magneto and flywheel. Any other ideas?

Spray starting fluid into the air box if it starts and dies out there is a fuel delivery problem if the mower has a petcock fuel shut of valve disconnect the fuel line after the petcock and hold a container under the hose turn on the valve to ensure gas flow to carb if there is no petcock valve I would still check the line to carb make sure gas flows through the hose to carb.

Jul 23, 2009 | Champion International Champion& Small...

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