Has no pressure unless trigger is released then it will build up a little . i just replaced the unloader valve and got same result. i have the monifold off and there is nothing wrong with any of the seals and valves. looks like new inside . this washer has only 10 hours run time on it ,
Your water inlet may be stopped up. Whether this model only has a screened hose washer or a better filter, pay special attention to that. Be sure the pathway is free and clear.
Take each of poppet valves and while pushing (with a pencil or something) on the part that moves up and the spring pushes it back down - with magnification and lots of light, be sure there isn't a small piece of debris affecting one of those valves. Its easy to miss, so look very closely.
Next, remove the hose from the pump. We are by-passing the entire unit that includes pressure hose, trigger gun, lance, spray nozzle. If it seems to pump a lot of water out of the pump--then the problem is most likely the trigger gun is clogged or the pressure nozzle is clogged. Some trigger guns can be taken apart -- some, not so much. Same with nozzles.
I hope this helps you, Randell. If yes, please take a sec to rate me. Thanks!
Don
SOURCE: pressure washer stalls out when wand nozzle is released
common for not starting unless trigger engaged as you are turning the pump as well as engine creating pressure,as for stalling pump has unloader valve which is probably in need of grease(use good silicone grease)this allows water to ciculate when trigger released.
SOURCE: I have a Generac pressure washer, model #01450-0,
Take a small diameter wire and poke thru the discharge hole of the spray head to clean out.
Second time in 6 months that I had the same problem. The problem is alway in the spray head.
SOURCE: where is the unloader valve on my pressure washer
is not necessarily a cap, but could be a screw in plug, that should be close to the hose hook-up on the pump Inside there there should be a round ball and a spring that you can tighten or loosen to adjust the unloader and if it has been used ALOT, where the ball seats there could be grooves cut in there and you might need to get a valve kit to fix it
SOURCE: Karcher G3050OH Pressure Washer Spill / Unloader Valve (Bypass)
You should put 'locktite' on the male thread and screw it in all the way and lock it there. That is how it works ,the spring keeps the valve at the bottom closed during high pressure operation. When the gun is released the part with the o-ring is forced down resulting in the valve opening and then the pressure is by-passed.Those dont normally give trouble. Look for a blocked nozzle or a restriction somewhere in your high pressure hose.
SOURCE: Unloader Valve - Karcher Pressure Washer
where is the unloader valve locaed on a Briggs Stratton pressure washer?
869 views
Usually answered in minutes!
Hose assy. not stopped up , all valves are clean and working . when engine is running without the hose attached it still dosent have high pressure. The engine will stall when handle isnt depressed now. It hasnt been doing that . this is a new property of the problem. What to look for next ? It still has me baffled .Thanx guys
The engine stalling when the trigger is released is 100%, definitely as unloader issue. If you've just replaced the unloader and the engine stalls when you release the trigger; either the new unloader is screwed down too far for your pressure washer or the unloader is not installed properly. Screwing the unloader counter clock-wise (less pressure on the spring) is how to back off on the pressure setting.
Nobody has thought of it yet, but with the manifold off, pull the crank cord and be sure all pistons are moving. It is possible that one of the pistons has become unattached from the "wobble-plate", or cam -- which ever it has.
Other than that--there is nothing else. Just so you understand, the only way to actually have pressure is for the proper amount of water to be forced through the pressure nozzle. So - right out of the pump, you wont have pressure. But you should have "flow". Certainly you would look at it (with the hose off) and even if it was working right you may think "I can **** harder than that". That's because you only have flow -- not pressure.
So long as the new unloader is causing the engine to stall -- and us not knowing why this is occurring -- there is no need to test further. That bit has to be understood and fixed.
I had assumed that your washer had one of those unloaders that the body is molded into the manifold head of the pump. Apparently it uses a completely separate unloader??? At this point I'm a little worried that you've installed it backwards. I've seen a lot of people do that. This is why it is urgent that we understand exactly what is happening with the unloader before doing anything else.
Hopefully you can work on it tomorrow, and we can communicate until we find it. It has to be one of the things I've brought up -- there is nothing else. Oh, one more, and this one is way out there - but its possible for the engine shaft to be spinning inside the hollow shaft of the pump. This can happen if the set screw becomes loose and the "key-way" falls out. Oh, but that couldn't be the case because your engine wouldn't bog down and die when you release the trigger.
Don
×