Ryobi Gas Pressure Washer Advice Needed

[shurguywutt]

Good morning gents, I have a 2015 Ryobi RY80940B (Honda GCV190)- SN 0A15074D060170 pressure washer that needs some attention. I used it about 2 months ago and it worked fine. When I went to use it the other day it started surging at idle but worked fine when I squeezed the wand handle so I used it to clean a couple mats. Eventually it just stayed locked at high pressure even when I released the wand handle. I figured this was bad for the pump so I shut it off to think about it. I figured the carb was probably dirty even though I use non ethanol fuel only in this unit. So I started to take the carb off and all of the gaskets and insulators all fell off and I don't remember the order they go in lol. Anyways, after doing some investigation online it appears not only could the carb be dirty but there is also a valve on the bottom of the pump that is secured by a jam nut that loosens over time and messes with the pump's load on the engine. This could have been causing my problem from the beginning. Anyways, I am just looking for some advice on how I should proceed from the experts here. There is not really any good info about how to set this valve that I could find. Also I couldn't find a good diagram on the order that all of the gaskets/insulators go so any help on that would be helpful too! Thank you in advance!

 

[Bertrrr]

Think I would uncouple the engine from the pump first and tackle that issue - the pump can come later-
the fact that it was surging while running with no / load indicates the governor hunting which points to dirty fuel/ carb etc.
If you can't find a manual or parts break down on line I'd get another carburator and keep the old one for a spare.
They are pretty reasonable to purchase.
As for your pump- when you release the trigger - it should go into by-pass by way of the relief valve which is usually mounted on the pump - sounds like it's stuck - post some pics if you can

 

[shurguywutt]

I used it about 2 months ago and it worked fine.

I take that back, now that I think about it there was slight surging when I used it a few months back.

I would uncouple the engine from the pump first and tackle that issue

Is it difficult to detach?

 

[beatleswmc01]

There may be service manuals available online. For getting the parts back on in the right order, engine parts breakdowns will be able to help (PartsTree is a good one for when you don’t have commercial access to breakdowns). Remember to try to avoid buying parts until you have things properly diagnosed, saves a lot of headaches but in your situation you’re probably not totaled.

 

[shurguywutt]

Would only run on choke so I cleaned the carb and got it to idle ok. I am having a problem with the 'throttle down' now. When I pull the trigger it gets locked into high pressure flow (doesn't matter if you pull the trigger or not). Not sure how to get it to idle down. There is a throttle cable that attaches from the governor to the pump (like a pressure plunger type device that moves the gov). I was suspecting it may be getting locked up in the pump. After I removed the retaining clip I can't get the plunger(??) out of the pump. I have sprayed it with pen oil and tried to work it with a vice grip. No dice.

Am I going in the right direction here? Thanks for any ideas