How do you "winterize" a power washer?

[JeepYJ]

I use this stuff (picture below). Screw it on the water inlet and pull the starter cord a few times (ignition off), until the fluid starts shooting out the water outlet. I bought my Generac 6590 in March 2015 and it’s still going as strong today, as back then. It’s stored in my uninsulated garage, all the time.

I use this after every time I run the pressure washer just in case I forget to do it in the fall. I found 4-5 on clearance at Walmart years ago so still working through that supply. Drain and disconnect all the hoses and wands.

 

[HAP]

Leave the engine switch off and pull it over a few times with it tilted over on the side where the water hose connects. Displaces most of the water in the pump.
R,
HAP

 

[atch]

I plan to move my power washer to an unheated shed out back for the winter.

What do I do to keep the water inside it from freezing and breaking something?

Can I start it for a few seconds to pump the water out?

Here is a screenshot

I ordered a can of this stuff from Amazon and used it today before putting the washer in the unheated shed. Thanx everyone for reading/replying.

Even so I was going to take the pump off of the engine and store it in the house anyway. Those 4 Allen headed bolts were being a real b**ch to get out so I used the can and moved on to something else.

 

[mikegt4]

I have been using this arrangement on my PW for 27 years. The original pump lasted until 2 years ago when the internal plastic valves crumbled from age. I replaced the pump but I certainly can't complain about 25 years of service so winter prep must have worked. I just cobbled together this funnel from parts I had laying around, zero cost for me. I used a "boiler drain" which is like a normal hose faucet except it is 90* instead of angled and fastens to the input hose attachment on the pump. The rest is just some thread adapters and a bell adapter serving as a funnel. I just attach it to the pump input with the funnel facing up, fill to about half way with RV antifreeze and pull the engine through until the antifreeze squirts pink out of the pump output ******. Winter prep done in about one minute.

 

[smackey05]

Drain, add antifreeze and lubricant and put away for the next year.