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The OEM Technologies 3100 psi 2.5 gpm brass head horizontal axial replacement pressure washer pump kit w/ powerboost® is available for purchase today.

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OEM Technologies 3100 PSI 2.5 GPM Brass Head Horizontal Axial Replacement Pressure Washer Pump Kit w/ Powerboost®

OEM Technologies Pressure Washers and Accessories
Model: 86CAH12B
(Based on expert analysis, manufacturer ratings and customer reviews)
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5
3 Reviews
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  • Features
  • Specs
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  • Accessories
Garden Hose (Female)
Garden Hose (Female)
22m Threaded (Male)
22m Threaded (Male)
Direct Drive Horizontal Axial Replacement Pump
Fits many brands & models up to 3100 PSI

3/4" Shaft & SAE Gas Engine Flange
Produces up to 2.5 GPM, suitable for homeowner units

Thermal Relief Protection
Prevents the pump from overheating

Fully Anodized Die-Cast Aluminum Crankcase
Prefilled with oil & sealed for simple installation

Brass Head
Sturdy & long-lasting; resists corrosion
PowerBoostģ Technology enhances cleaning performance

Dual Oversize Radial Ball Bearings & Polished Stainless Steel Pistons
Better wear & friction resistance extends seal life

Threaded M22 Pump Outlet & Integrated Unloader
Connects to many hoses; starts easily

Complete Kit
Includes detergent siphon tube for soap application
New mounting bolts & 3/16" shaft key for a tight connection

Be Sure To Measure Shaft & Bolt Holes Accurately
There is a 25% restock fee on returned pumps

Need Help? Call Our Pressure Washer Experts.
Accessory Grade
Accessory Style
Garden Hose (Female)
22m Threaded (Male)
Rated PSI
3100 PSI
6 Pounds
Product Length
7 Inches
Product Width
5 Inches
Product Height
7.5 Inches
Consumer Warranty
1 Year
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*Ask Brian about the OEM Technologies 86CAH12B. Sorry, no repair questions:




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  4 Questions
Q: I purchased the one 8.6cah12b pump from you and so far it has worked great. Question is I just tried the detergent siphon and I can't get it to siphon. I purchased the blue soap tip and tried everything. The real curious thing is normally the motor runs in idle mode and drops down when I pull the trigger on the wand. Now it idles when I pullnthe trigger and drops down when I release and it appears to be putting backpressure on the pump.
by Ron Hagler from Florida on August 07, 2016

A: Soap siphons only work when the black tip is in place. Your pressure washer-safe detergent needs to have a watery consistency- if it's too thick (like dish detergent) it won't be picked up by the water rushing by.

To get the siphon started you may need to lift the level of the soap container. Once the siphon is established you should be able to keep it close by, at ground level.

Here is a link for more information about How A Siphon Works.

I'm sorry, but the only blue nozzle I'm familiar with are in the Second Story Spray Kits. They constrict the water supply so the water shoots higher. Since your pump and motor are directly connected they will affect each other.

OEM Technologies pumps are made by Simpson- you can contact them at 877-362-4271 if you have questions about your pump's performance.
by Brian, Product Expert
Q: I have a pressure washer with a 5hp Honda engine.
The drive shaft measures .875.
Bolt holes are 2-1/2"
Which replacement pumps will work for me?

by Ed Herring from Texas on July 05, 2016

A: That would be a 7/8" shaft. Does the pump come out of the bottom of the engine, under the pressure washer? Does it have 3 bolts holding the pump on?
by Brian, Product Expert
Q: Will this model fit a Simpson MSH3125?
by Gary from Vermont on July 05, 2016

A: Yes, this should work with your unit directly.
by Brian, Product Expert
Q: will pump Model 86cah12b fit a troy built powerwasher model 020242 rev.4
by Mark from New Jersey on June 26, 2016

A: I'm sorry, we don't sell Troybilt products, and there isn't a cross-reference of all brands and all pumps available- I don't know if it will fit.

OEM pumps are made by Simpson, so you may want to call them at 877-362-4271 to discuss the bolt pattern and shaft size you need to see if they have a pump that will fit.

by Brian, Product Expert
OEM Technologies 86CAH12B Reviews & Ratings
3 Reviews  Sort by 
Arnold S.
Reevesville, SC
Purchased from Pressure Washers Direct
Purchased 4/16/16
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Pressure Washing Done Right
Really puts out the bleach stronger than any pump I have seen before. (Yes bleach) Iíve done 50 houses and about 10 driveways before it gave out. Thatís a lot of hours on a pump. Iím not complaining for the price.

That pump made me a lot of money. I keep and extra one on hand just so in case. I wash about 250 houses a year. If you want it for personal use just remember to always rinse it out good before storage. If you only wash your house twice a year thatís 25 years.
Arnold Recommends This OEM Technologies Product
Brian, the Pressure Washer Expert
Product Expert
For anyone reading this review, please be aware that using bleach through your pressure washer pump will void the warranty whether you rinse it out or not.

Caustic chemicals like bleach damage the seals in your pump. If you must use a bleach or other non-pressure washer safe solution, we suggest using a Detergent Foamer or Chemical Injector to introduce the chemical downstream from your pump.
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Arthur P.
Sebastian, FL
Purchased from Pressure Washers Direct
Purchased 2/25/16
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
Works Super
Easy installation. Thanks Pressure Washers Direct for being there.
Arthur Recommends This OEM Technologies Product
Arthur's Experience With Pressure Washers Direct
Web Site


"Emailed PW Direct, fast reply with the info I requested."
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Donvorkia M.
Pearl, MS
Purchased from Pressure Washers Direct
Purchased 7/24/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Excellent Pump
This is a great pump. Oil is already in it. You can tell the smoothness on how it runs.
Donvorkia Recommends This OEM Technologies Product
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