Question about McCulloch FHH18A Electric Pressure Washer

2 Answers

Shuts off when high pressure wand is attached

I hook up the hose, let water run, pull the trigger and water shoots out, motors kicks on - everything is fine. Attach the "high pressure wand " to the "gun" and it barely shoots water and shortly(seconds) trips the reset switch. I shut it off , hit the reset, pull trigger again ...same thing ! I've used this twice since I bought it ! I tried soaking the "wand" in vinegar and water to loosen up deposits ... nothing is working .... losing my mind here !
Bryan L. / Connecticut

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,740 Answers

Hi Brian. Welcome to FixYa I am Kelly. This sounds as if the bypass / unloader valve is stuck in place and the pump id dead heading causing the unit to shut off. (There is most likely some corrosion in the unloader / bypassy valve assy / housing. What you can try is pouring at least 3 oz of oil into the water inlet assy and briefly.... like VERY briefly switch the unit on then back off. Then let it sit over night. The next day connect everything for normal use then turn the unit on again briefly. Use a bucket to PURGE the oil that you put through the system by squeezing the wand Power SW Off until the oil purges. Then switch the unit on and rapidly trip the trigger at 0.5 sec intervals or less. If it trips off wait 5 mins and try it again. Do the rapidly tripping the trigger on the wand routine for about 20 seconds. Your forcing the bypass unloader valve to cycle trying to clear out any debris / corrosion.
This works often and well. There are exceptions. Hopefully it will work for you.

Thanks for using FixYa.

Kelly

Posted on May 17, 2010

  • Kelly
    Kelly Jun 30, 2010

    Brian if it is tripping the unit off the pump is dead heading. That means the unloader valve is NOT moving up and down as the pressure changes. I.e it is stuck. Corrosion builds of from lack of use on the springs and the oil trick that I mentioned in my first post has worked in 95% of the cases. If you have not given that a try I highly recommend that you do. I have been working on pressure washers gas and electric for well over 30 years. Unless the spring has broken from corrosion which in your case I doubt... the oil through the unit sitting over night should get you going again. If your one of the 5 percent that does not have success the only other option is to remove the unloader valve on the outlet side of the pump and clean it up. When you put it back together use #105 white grease available at any automotive parts supply to lubricate the seals, spring and mating surfaces.



    Thanks for choosing FixYa.



    Kelly

  • Kelly
    Kelly Jun 30, 2010

    Brian



    One more thing it can be is an actual clog in the wand nozzle. If a nozzle clog will not clear the only option is to remove the nozzle and physically dig out with a scribe or jewlers screwdriver what ever it is that has manifested itself in the nozzle. Sometimes a nail works well for clearing a REMOVED nozzle. You clean it from the inside. If there is debris in the nozzle that is too big to pass viat the orifice hole the only way to get it out is to remove the nozzle.



    Any feedback on what you have tried would be greatly appreciated. I really am trying to help..... Wtih one way communication it is difficult to get something fixed or repaired.



    Thanks again for choosing FixYa.

    Kelly

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

1 of two problems it could be you could have a blockage in the wand or u may have a dual water end on the wand turning the very end part adjust the width of spray and turning the second to end part adjust the water flow through the nozzle and that can be altered like i did inadvertently hence the machine works with no wand and with wand doesnt

Posted on Oct 31, 2014

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Husky 1800 Pressure Washer motor will not turn off when wand trigger is released


I think you have one of two things going on hear, an overpressure problem or a carburetor issue with the engine.

Jul 25, 2017 | Husky Garden

1 Answer

Why doesn't it work when the water hose is attached?


Pressure washers can only be started/run with water attached. No water burned out pump in 5 seconds! If pump puts out high pressure water without wand/hose attached, bad wand or hose, if not bad pump. Replace pump.

Apr 05, 2016 | Garden

2 Answers

Why does the motor run when I do not pull the trigger of the gun after the high pressure washer is turned on? The motor is supposed to run only if the trigger of the gun is pulled and shuts off when the...


When water is running through system, the motor has to run to keep the pressure built up. So, if the water is leaking out, the motor think it needs to keep running to keep the pressure built up. The leak needs to be fixed to the motor will not run constantly.

Jun 16, 2014 | Karcher PSI Electric Pressure Washer

1 Answer

Black and decker electric power washer nothing coming out of wand all water coming out trigger.


Either the pressure tip or wand are blocked or the valve in the trigger is broken. Remove the high pressure tip and either try another tip or pull the trigger without a tip on the wand to see if you have the same problem. If available, try another pressure gun on the hose.

Jul 25, 2012 | Garden

1 Answer

I have a honda 2600 pressure washer. After running fine for a couple of seconds the water will stop flowing out the tip. It is receiving water,but will not flow it to the pressure hose. I even disconnected...


This happens when air gets inside the hose. An air bubble of sorts is in the hose and will not build pressure until you blow the air out of the line. Start the pressure washer, turn on the water. pull the trigger on the gun. It will spitter and spatter and come to a trickle. release the trigger on the wand. Pull the trigger again and it will eventually work it self out.

Jun 13, 2011 | Honda Black Max 2600 PSI Pressure Washer

1 Answer

When i switch on the power of my karcher K2.38 power washer, the motor runs but there does not appear to be any increase in pressure, which means that it is ineffective when it comes to cleaning the patio/...


Hi and welcome to FixYa, I am Kelly/
First off, remove the water supply hose from the power washer and locate the in line filter. Most of them are a plastic screen stuffed into the plumbing just behind the hose washer. Others have a short stand off and the filter / screen may be where the stand off attaches to the pressure washer. Others units have in in line sump that usually has a blue or red cap that you remove to clean the sump. Find the filtering mechanism(s) and clean it.
After doing this... attach the water hose loose to the power washer and turn on the water supply hose. Wait for all of the air to purge from the water supply hose. Then tighten the water supply hose. After that... Squeeze the wand trigger until all the air purges out of the high pressure hose and you get a solid stream of water with the unit off. Once you get a solid stream of water with the unit off... power the unit up and see if the high pressure hose becomes rigid / charges with high pressure. Next.... cycle the wand trigger 1 second on... and then wait for the hose to charge again. Do this multiple times. What your doing is forcing the un-loader / relief valve to stroke in the pump. Until the un-loader valve stokes un-restricted; you will have pressure problems. Next after the hose is fully charged... cycle the wand trigger very rapidly until you get high pressure each time you cycle the wand trigger. At this point your done and can proceed with patio cleaning.

Should this NOT resolve your problem.... get as much water out if it as you possibly can and pour a few ounces of engine oil into the water inlet. (Easier said than done... but you have to get oil into the pump and then let it sit over night. once you have oil in the pump pull the recoil 2 times with the ignition off just to force oil through the pump)
The next day you go through the same routine as stated above. This brings about 80% of the stubborn ones back to life again. Should it still be fussy after doing all of the above... you will have to replace the unload-er valve. If you removed the un-loader valve for any reason... you must clean out the pump housing and lubricate it and the un-loader valve with white grease (<-Available at any automotive parts source) BEFORE reinserting either the old one or a replacement un-loader valve. If you attempt to use the old one with lubrication.. make sure to remove any debris from the springs and wipe the seals clean with a PAPER towel before lubrication.

Thanks for choosing FixYa,
Kelly

Apr 16, 2011 | Karcher K2.26 Electric Power Washer

3 Answers

Black and Decker PW1300 Type 1 Pressure Washer The unit will not pressurize, the motor stays on, the water ways seem clear, a low pressure stream (normal for "motor off") comes out when I...


Hi and welcome to FixYa, I am Kelly.
Not sure if anyone has responded to you but.... This is a symptom of the unloader / bypass valve sticking. The unloader bypass valve is located on the output side of the pump either under a brass cap or an extended stem with a knob on it for pressure adjustment.
Try this...
- Lay the unit down so that the water supply connection fitting is facing up. Leave the high pressure hose connected with wand. (Power to the unit)
  • First inspect the inlet screen for debris.
  • Next pour about 3 oz of regular automotive engine oil in the water supply fitting. Take your time... do momentary on / off cycles of the switch (bump the pump.... on / off) You are trying to get oil to the outlet fitting (No more than 1 second on off cycles)
  • Check for evidence of oil at outlet fitting
  • Leave it set overnight with oil in the unit. (Water supply and outlet fittings up.)
NEXT DAY.... add 2 oz more oil and connect water supply. (PURGE HOSE of ALL air before connecting)
  • Do not pull wand trigger yet
  • Cycle unit on and off about 10 times slowly... don't ruin the switch then let sit 10 mins.
  • Turn unit on without triggering and let run for about 2 minutes.
  • NEXT STEP be advised your going to shoot out OIL
  • Begin triggering the wand on 1 sec off 3 seconds for at least 2 minutes (your trying to get the unloader bypass spring / plunger and seals to start moving inside the pump high pressure area.)
  • If your wand has a soap application function make sure the wand is in the HIGH PRESSURE position. (Closed CCW)
This procedure does not always work but, I have revived about 70 % of the pressure washers I worked on by just doing these steps. If the procedure does not work... you will have to disassemble the unloader / bypass valve by pulling it out of the housing and then cleaning up the inside of the pump housing and wiping the seals clean. IMPORTANT STEP here: Before inserting the valve back into the pump housing you MUST lubricate it with #105 white grease. Housing and unloader / bypass valve parts. (white grease in small tubes at any automotive parts source.

Thanks for choosing FixYa,
Kelly

Feb 24, 2011 | Garden

1 Answer

Won't stay running


Pressure washer when you first try to start them that stop underload. We had the same type of problem with 11 hp Honda if you hold the trigger open the motor will be under less load we found by running the motor for about a minute it would work normally. Remember to make sure the water hose is turned on pull the trigger on, until water is coming out of the wand , now try and start the motor but also hold the trigger open, now you will not be building maximum pressure, after about a minute release the trigger and see if it keeps running.

Feb 19, 2011 | Briggs & Stratton 2200 PSI Gas Pressure...

2 Answers

Honda 2400 psi before it went out i cold tap the end of the wand on the ground and the pressure would return now when pull the trigger there is no pressure only a fine spray .its a karcher with a honda...


hi,
there is a small ball bearing inside the nozzle on the end of the lance , this can get jammed or missaligned and the nozzle orifice can get blocked , clean this or replace the whole lance with another 200 Bar lance .

hope this helps

Feb 01, 2010 | Honda Karcher G2400HH-R Pressure Washer

1 Answer

Ex-Cell VR2500 Builds Pressure but Won't Spray


I have a similar problem and diagnosed it to be a problem with the gun. I spoke to a technician that services this pressure washer and he walked me through all the diagnostic steps. The pump is working because there is pressure being built up and the gun sort of works because you can get water out before the washer is started. The technician said that the mechanism inside the gun is either clogged or broken. I am going to Home Depot or Lowes to purchase a new gun and will try it tonight. Guns are only about $30-40. He said generic is fine as long as the thread matches and PSI is in range. Good luck!

Aug 09, 2009 | Karcher 2500 PSI Pressure Washer

Not finding what you are looking for?
McCulloch FHH18A Electric Pressure Washer Logo

713 people viewed this question

Ask a Question

Usually answered in minutes!

Top McCulloch Garden Experts

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Roland W VanLue
Roland W VanLue

Level 3 Expert

486 Answers

roeb

Level 2 Expert

263 Answers

Are you a McCulloch Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...