Honda GCV190 pressure washer engine

[Tiger Small Engine]

Thanks to everyone who replied to my pleas for info. I went ahead and drained the oil from the engine again and did another oil change this time making sure that I only added 18oz of 10w30. The oil that I had just installed less than 30 minutes of operating time was quite dark not a honey color when I drained it. Unfortunately the lower level of fresh oil made no difference. After about 5 minutes of running it began to smoke If I let up on the spray wand the pump goes into bypass and the smoking is greatly reduced but as soon as I start spraying again the smoking starts up. So the oil level is not the issue. I am confident that I got the valves adjusted properly, the pressure washer started on the 1st pull and ran great until it started with the smoking...white smoke no doubt oil. I did not check it this time but what happened earlier was oil being drawn into the carb form the oil breather tube. Whoever suggested that the issue might have to do with valve guide, seal or engine wear is probably on point.
So now I am asking what steps I should take to troubleshoot and repair this issue. Yes I know about not screwing I the dipstick on Honda engines. This one has the small plastic dipstick that screws in at the base of the engine. It has a mark about half way up that is the full mark and after adding g 18 oz and reading the dipstick with it just placed on the tube (not screwed in) it is right at the full line.
Again any and all input welcome
Spit

Rebuilding a small Honda engine is not worth it cost or time wise. If you want to take the engine apart and rebuild it, and have never done this, there are plenty of videos, etc. that can help you.

 

[Cfs]

Rebuilding a small Honda engine is not worth it cost or time wise. If you want to take the engine apart and rebuild it, and have never done this, there are plenty of videos, etc. that can help you.

Tiger
When you reference rebuilding the engine. What are you thinking might need to be done to it? I am thinking that the rings, piston and cylinder is not the issue. It runs so well until the oil starts to find its way from the breather hose to air filter box/intake. I have been researching everywhere I can. I have seen a few posts on other sites that refer to a potential problem with the breather and a oil return hole/port now that was on a Kohler but I am curious if the same issue could be an issue on a GCV190?
I have been looking at the IPL for the engine and see that the breather seems to be vertically mounted rather than horizontally like most small engines. Have you ever had one apart and do you think it makes sense to take a look at it?
What about the oil seal on the intake valve as a possible cause? I saw a video of a problem with an exhaust valve guide shifting. The fix was taking an intake valve seal removing the actual seal from the center and placing the disc onto the valve under the valve spring and it holds the guide in place. This post talked about this issue with the valve guide on GCV190 being a known issue?
I really appreciate your input. I am not questioning anything that have shared. I am retired and have the time to examine and learn by tinkering hands on.

I am going to disconnect the breather hose from the intake box hook up a longer hose to the breather and verify that the oil is coming from the breather

I will post back what i find. Again I am wondering where the return port for oil in the breather is located and if it can be partially plugged restricting oil returning to the oil sump?

Thanks again for your help
Spit