Replaced a pressure washer pump

[JustDandee]

So I have this low hour Honda powered, Karcher pressure washer given to me. I have had trouble with the pump since day one wanting pressureize the line. I have pulled it part and only get temporary functionality…

I want to know if anyone has replaced these? Anything to consider as far as mounting, brands? Have changed PSI successfully?




I am wondering if I use something like this? https://www.amazon.com/YAMATIC-Hori...Replacement/dp/B07KMY34ZZ/?tag=wranglerorg-20

when I google Karcher pump these come up.

 

[sab]

Almost twenty years ago, when I lived in the north, I forgot to winterize my pressure washer, and the pump housing cracked when it froze. I don’t recall the installation of a new pump being troublesome, but I am old, and it was a long time ago. I ordered the replacement through Sears because it was a Craftsman pressure washer. I think the pump was actually a Briggs and Stratton.

 

[TJ4Jim]

So I have this low hour Honda powered, Karcher pressure washer given to me. I have had trouble with the pump since day one wanting pressureize the line. I have pulled it part and only get temporary functionality…

I want to know if anyone has replaced these? Anything to consider as far as mounting, brands? Have changed PSI successfully?


View attachment 551712

I am wondering if I use something like this? https://www.amazon.com/YAMATIC-Hori...Replacement/dp/B07KMY34ZZ/?tag=wranglerorg-20

when I google Karcher pump these come up.

Did my 25 year old Honda HP washer last year with a new pump and carb off Amazon and it's like new. I just searched Amazon with the model # and had several direct fit to choose from, after that it was just 4 bolts and done.

 

[LJ owner]

I have the identical Karcher pressure washer. Owned it for 20+ years. It has been great but last winter, it would sometimes lose prime. Now that we are in warm weather, it is fine. Guessing the seals are getting hard and need replacing. Plan on going to a Karcher service center and order a new pump, I have one 20 minutes from my home.

 

[macleanflood]

I think Northern Tool sells a replacement pump for pressure washers.

Problem is you need to match the crankshaft size and woodruff key. And bolt pattern. So I'd get your broken pump off and get that measured. I wouldn't trust researching the make and model of engine because who knows if that batch of Honda engines was ordered with a special shaft.

I have two or three bad pressure washers. One engine got put on a soil shaker rock screen I built and the other one is waiting for a go cart build.

I've got a 4x4 lift with an 18 HP Briggs and Stratton and it needs repowered. Try finding a hydraulic pump that bolts to the same shaft, key and bolt pattern. Might buy a lathe just to build an adapter.

-Mac

 

[1o1proof]

Same experience as @TJ4Jim, no worries no problems.

 

[JustDandee]

Alrighty.. I thought it was some old Costco unit and seeing that I got some options I will take a closer look at the rebuild kit and/ or swapping it out.

 

[DuckNut]

Most pumps state the engines they will fit on. Swapping one out is literally 4 bolts (and adding oil if it is not pre-filled).

Here is where you need to make a decision as no pump will work great in all uses. What is your typical use of the machine?

A 2,300 psi with 4 GPM will clean circles around a 3,200 with 2.5. the volume of water is what cleans. If you take the second choice you can swipe it over your foot a foot away and only get wet. Do that with choice 1 and you will be heading to the emergency room. The volume of water is what cleans. The weight of the water is what removes the crap you are trying to clean.

Look at professional sprayers and you will see some moving up to 8 GPM and they clean a 36 inch swath in a single pass. A low volume unit will leave your driveway looking like a zebra.

There is a happy medium and for the occasional user 3.5-4 GPM would be that point. However, you are not going to find these at the price point of the one in your picture.

 

[RFAASRMA]

I had a semi-recent Honda pressure washer pump fail. I just made sure the output shaft and key sizes along with the mounting bolts lined up and was in business. I opted for a 3000 psi pump with no complaints.

https://www.amazon.com/dp/B004SZOT14?tag=wranglerorg-20

 

[JustDandee]

That is pretty much the one I ordered and installed last night. Little more difficult in the the access to the mounting bolts then the OE design but bolt on. The original is 2400 psi this goes to 3000 psi. Just a few tweaks to dial in where the engine is not over loaded but we definitely working good with more PSI!

Thx for tips everyone!

 

[bucky]

It’s all about Cleaning Units. PSI x GPM. PSI = stripping power. GPM = washing debris away.

 

[macleanflood]

Harbor Freight had a 20 percent coupon for Labor Day weekend. Bought a 22 HP Harbor Freight engine and swapped the 40 year old Briggs and Stratton 18 I/C. Bolted right up...cept the crank on the HF was an inch longer so I spaced the hydraulic pump adapter out a couple of washers. Otherwise super simple. Need to drill more holes for mounting and figure out the electrical so I can start and stop the engine from the platform.

-Mac