Question about 5.5 HP GX160 Engine

1 Answer

Engine runs but back fires then dies when put under load

Used on a pressure washer. Pump OK

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  • Joseph Scheall
    Joseph Scheall Apr 14, 2014

    Rebuilding Carb did not help. No diaphrams in this style carb. Governor or valve problem?

  • Roy Cagle
    Roy Cagle Sep 14, 2014

    Check the valve lash for proper adjustment.

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  • 29 Answers

Rebuild the carburetor. Just replace the old gaskets, diaphragms, needle and seat. You can get a rebuild kit from your local lawm mower repair shop. also, don't run last years gas and if you keep gas in the tank over the winter buy a winterizer and pour it in the tank when starts to get cold. Hope this helps!

Posted on Apr 13, 2014

  • 7 more comments 
  • Mark Cunningham
    Mark Cunningham Apr 13, 2014

    Rebuild the carburetor. Just replace the old gaskets, diaphragms, needle and seat. You can get a rebuild kit from your local lawm mower repair shop. also, don't run last years gas and if you keep gas in the tank over the winter buy a winterizer and pour it in the tank when starts to get cold. Hope this helps!

  • Mark Cunningham
    Mark Cunningham Apr 15, 2014

    At this point you will need to have the professionals check the governor and valves for damge

  • Mark Cunningham
    Mark Cunningham Apr 15, 2014

    Ok after a little research I found that the small Honda engines b\carbs are at fault even after a rebuild. Check in tank filter, common problem. Make sure fuel in line is flowing. Check air filter. Buy new carb if no changes. This is common with these and should be pretty cheap to replace.

  • Leon Houlis
    Leon Houlis May 09, 2014

    The valves are not closing well and combustion chamber fuul

  • Leon Houlis
    Leon Houlis May 09, 2014

    of Add a Comment

  • Leon Houlis
    Leon Houlis May 09, 2014

    and combustion chambers are full of carbon Also adjust motors

  • Leon Houlis
    Leon Houlis May 09, 2014

    advance

  • Mark Cunningham
    Mark Cunningham May 09, 2014

    This is true, carbon build up could be causing valves to stick. Didn't know that there is an advance on these motors?!

  • Roy Cagle
    Roy Cagle Sep 14, 2014

    There is NO advance.

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1 Answer

I have a craftsman 675 pressure washer. It runs fine. But when I turn on the water, it dies. What is wrong with it?


either the engine is worn and has no power or the pump is overloading the engine........

squeeze the trigger before you turn on the water.....
try no high pressure hose to make sure the water exits the pump ok

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Try also running the engine without fuel tank cap, if engine runs fine replace the tank cap.

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Pressure washer turns off after 3 or 4 minutes


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RUN OK WHEN COLD, AFTER 15 MINUTES IT STARTS TO BACK FIRE THROUGH INTAKE IF GIVEN GAS AND ACTS LIKE IT IS GETTING TO MUCH FUEL AND THE ENGINE WANTS TO DIE IF I GIVE IT MORE GAS WILL DIE AND STARTS UP AND...


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Starts but won't stay running, i clean carburator and still have same problem, unit has been used very little, still look new, Thanks,


Have you checked your oil? You need pump oil half way up in reservoir. Open plug on top of pump and check oil. Pump takes SAE 20 or 30

Next, open oil plug below engine and check your oil level. It should come up 1/2 way on dip stick. Engine takes 10W30. Don't turn washer on its side or upside down to drain oil or oil will run into carburetor.

Is the water turned on? Are you holding gun trigger open while starting? Pump needs water flow. DO NOT tie gun trigger open with wire and then start engine. That gun will flip around and shoot a hole in your leg.

If the engine starts, then you have gas, spark and compression

If engine won't stay running, the exhaust port might be clogged, or the carburetor is not letting in enough gas, or gas is not flowing to carburetor.

Check the screen over exhaust port > is it dirty or clogged? Clean with WD-40 or break it out with a screwdriver.
Remove gas filter below gas tank >>> it has a hex bolt >> loosen bolt >> the gas should come flowing out >> put it back if gas comes out
Next remove rubber gas line feeding gas to carburetor >> gas should flow out this line too >> if flows then put it back.

What about your air filter? Take it off. See if engine fires and runs without air filter. Air filter may be clogged.

While air filter is out, you can see open port to carburetor. Spray some WD-40 into carburetor. Fire up the engine. It should spark real healthy on the WD-40. Keep spraying WD-40 into carburetor to see if you can keep engine going. Don't forget to keep gun trigger open so water is flowing and pressure is not building in pump.

If engine keeps going with WD-40 but dies without it, then your carburetor is very suspect. You might need a new one.

If engine will not keep going with WD-40, then the spark is very suspect.

Change spark plug. Try again. If it doesn't fire up after that, you need to take it to the shop for repair.

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1 Answer

Karcher 2600 (Honda engine) has lost pressure.


Dear Modad,
First one must see if the problem is in the Honda engine or in the pump. So you must try the Honda with no load. You can remove the gun from the pump, but leave the water supply going into the pump. In this way you still have some cooling effect from the water. Now with no load you try the Honda engine. If it is possible tune and set the Honda engine to work correctly. Now if the Honda runs smoothly,...then the problem is in the pump. Regarding the pump try the system by attaching the gun with no NOZZLE/ or LANCE. Open and close the gun to see reaction of Honda Engine. If in this case the Honda runs OK....then attach a NOZZLE so that you have pressure and load. If the Honda starts to die down, this could be that the Honda needs servicing. This like having a car and uphill it will stall and dies down. Here the engine needs servicing. One small thing to look for. I came across Honda driven pumps which have a cable coming from the Honda's carbureter to the head of the pump. When the gun is released the cable is pulled from the head of the pump by means of a piston type valve and this in turn will reduce the speed of the Honda. As you see it is difficult for me to pinpoint the real cause when I do not know the model number and type of pump you have. But if you go by these guide lines you shuld find the fault. Remember...ALWAYS try HONDA ENGINE without load first. I also wish to add that the Honda could be working OK...but then the pump has some problem that it is stopping the Honda. So the pump could also for some reason be jammed and this needs the pump to be serviced. Another hint is very simple. If the Honda is not getting to its maximum power and revs...then the pump will drop pressure.
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Regards,
Fulltech.

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1 Answer

Stalling


likely you air to fuel ratio is too lean, runs mean and hot but under load dies. then floods the carb.
when it happens pull the plug ,
kill engine :
is there a lot of gas or none.
remove the filter and watch the action of the carb does it open and close easily is the filter clean.
try supplying it more gas turn the gas supply screw 1/2 CCW and see if it will stay running, if not add more.
( NOT the idle screw on the carb side w/spring )
By the way did a bit of water come out if not the clutch/pump may be binding or stuck with soap goop.back flush with hot water.

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