Anyone handy with petrol power washers

[rb02259]

I have a briggs quantum generac pressure washer. Great machine but I bought a longer hose and now it wont start or if it does stalls out

When I swap back to shorter hose it work perfect so I know the issue is the longer hose

Would this mean I need to tweak the unloader valve to account for long hose or can it just not take it?

Thanks

Ryan

 

[Erie Fred]

Look at the quick coupler.

 

[carbon]

The length of the hose will make no difference as water isn't compressible. Ive supplied upto 100m of 3/8" id hose without causing any problems. Is there a leak on the trigger, does any water drip from the nozzle with the trigger released? If it does you need to sort that out first.

 

[Erie Fred]

I have a briggs quantum generac pressure washer. Great machine but I bought a longer hose and now it wont start or if it does stalls out

When I swap back to shorter hose it work perfect so I know the issue is the longer hose

Would this mean I need to tweak the unloader valve to account for long hose or can it just not take it?

Thanks

Ryan

No, as above no difference in hose length.
Your quick coupler it seems is not opening the valve (inside the coupler) when coupled up.

 

[cocker]

Is there water passing through the long hose ? Or is an end fitting blocked ?

 

[Turbo]

One of the fittings on the new hose could be over crimped causing a restriction. That means the water has a hard time passing through the hose, causing back pressure and stalling the engine.

See if you can poke something down the end of the new hose like a drill bit and compare it to the old hose, the bore should be similar.

 

[rb02259]

Thanks so much all for the replies and suggestions. I don't think any water is leaking but I'll take it all apart tomorrow and see if there's anything obvious wrong with coupler and also start trying to clear it if needed

Will provide an update when can but that's good news it should be easy fix

Ryan

 

[carbon]

Is it possible to get a couple of picture of the pump and couplings?

 

[rb02259]

Yes certainly my wife has me out shopping lol but will upload tomorrow as I'm off work

 

[Agroshield]

The length of the hose will make no difference as water isn't compressible.

While water is not compressible, hose is expansible. That might make a difference if the machine is particularly fussy.

Connect it up and leave it switched off. Pull the trigger and see if the flow of water differs between the two hoses. That would tell you if the long one is restricted.

 

[roofman]

Have you bought a hydraulic hose and coupler, there are 2 types of coupler..closed and fully open. The closed type need to be connected to allow the "pip" on the inside to open. I use 60m 1/4 hose on my machines with no drop in pressure.

 

[Gareth J]

This is interesting. I was going to say that a longer hose can cause restriction and affect performance, as hose length and bore diameter obviously have an effect on the power needed to push a set flow rate of water through a hose. And that's my experience with adding and extension with a narrower (1/4") hose to my pressure washer. Reduced performance.

However, the replies here imply that water speed through a hose is so slow that length is practically irrelevant. I need to check the ends of mine to check they aren't blocked but if it's a reasonable flow rate pump, a narrow bore and long hose could surely reduce performance.

 

[Smallfry]

Non return valve in the hose, and hose fitted the wrong way round ?

Probably not, but ...........

 

[rb02259]

Have you bought a hydraulic hose and coupler, there are 2 types of coupler..closed and fully open. The closed type need to be connected to allow the "pip" on the inside to open. I use 60m 1/4 hose on my machines with no drop in pressure.

I'm honestly not sure I bought the hose on amazon and a new gun I will take some pics tomorrow and maybe yous will be able to tell from that but plenty of good suggestions here so thanks all thought it was

Here's a stock image of hose from amazon

 

[roofman]

I'm honestly not sure I bought the hose on amazon and a new gun I will take some pics tomorrow and maybe yous will be able to tell from that but plenty of good suggestions here so thanks all thought it was

Here's a stock image of hose from amazon

View attachment 477407

Looks normal pressure wash hose with M22 fitting, i gather you have checked its not blocked. also the gun is flowing with the trigger pulled, you can check this by running water through the machine without starting it

 

[Turbo]

Hose length definitely does affect performance. The longer the hose the higher the restriction and the lower the working performance at the jet.

When I worked at a karcher dealer the max recommended length for a 1/4 bore hose was 10m, anything longer you should use 5/16 or 3/8 hose.

 

[carbon]

As you have replaced the gun are you using it with the short hose? If not then it’s likely that the new gun has the incorrect nozzle fitted and that’s causing your problem.

 

[rb02259]

Thanks all so to add clarity whenever I pull trigger before turning power wSher on water flows out at seemingly normal pressure. But once I turn it over it immediately stalls

What I had been doing is leaving the gun disconnected and once engine warms up a bit I can connect hose and it works but shorter hose works straight off the bat

I'm using longer hose with a new gun I also bought so maybe too many variables in the mix. It had the standard green nozzle on it I believe

 

[rb02259]

As you have replaced the gun are you using it with the short hose? If not then it’s likely that the new gun has the incorrect nozzle fitted and that’s causing your problem.

Tomorrow ill try old gun with new longer hose to rule that out thanks

 

[carbon]

It had the standard green nozzle on it I believe

Do you mean one of these nozzles

The green only means it has a spray angle of 25 degrees, you still need to select the correct nozzle size based on the max operating pressure and flow rate.