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Simpson MegaShot 3100 PSI (Gas-Cold Water) Pressure Washer w/ Honda Engine

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Simpson Pressure Washers and Accessories
Model: MSH3125-S
(Based on expert analysis, manufacturer ratings and customer reviews)

4.5 out of 54.5 out of 54.5 out of 54.5 out of 54.5 out of 5
412 Reviews
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  • Features
  • Specs
  • 16
    Q&A 
  • 412
    Reviews
  • Articles
  • Shipping
  • Accessories
Grade
Style
Water Pressure
3100
PSI
Water Flow
2.5
GPM
Cleaning Speed
7750
Cleaning Units
Engine
Honda GC
Honda GC190 Engine
Reliable engine starts easily, runs quietly

Maintenance-Free OEM Technologies Axial Cam Pump
Robust 2.5 GPM cleaning performance
POWERBOOST® technology delivers increased performance

Ergonomic Spray Gun
Work longer with less fatigue
Quick connect steel lance accepts standard nozzles & accessories

5 Stainless Steel Quick Connect Nozzles
0°, 15°, 25°, 40° & soap applicator nozzles

Siphon Tube Chemical Application
Just drop tube into pressure washer safe detergent

Robust Trolley & Frame Design
1 1/4", 16 gauge steel tube frame & 12 gauge engine plate
Convenient integrated gun, hose, & wand hanger; 5 year limited Factory Warranty on frame

25 Feet Of 1/4" M22 High Pressure Hose
Lets you work in a wide area


Engine
Engine Brand
Honda GC
Starter
Recoil
CC
190 CC
Fuel Tank Size
1.9 quarts
Consumer Engine Warranty
2 Years
Pump
Pump Brand
OEM Technologies
Pump Type
Axial Cam
Adjustable Pressure
No
Chemical Injection
Siphon Tube
Water Temperature
Cold
Pump Consumer Warranty
1 Year
Water Pressure
3100 PSI
Water Flow
2.5 GPM
Housing
Frame Type
2-Wheel Cart
Wheels
Pneumatic
Hose
Hose Storage
Hook
Hose Length
25 Feet
Hose Material
PVC/Plastic
Hose Diameter
1/4 Inch
Hose Connections
M22
Spray Gun
Spray Gun Connection
M22
Spray Gun Grade
Residential
Spray Gun Wand
Single Wand
Spray Tips
Quick Connect Tips (5)
Turbo Nozzle
Sold Separately
Overview
Made in USA
No
Weight
85 Pounds
Product Length
33 Inches
Product Width
21 Inches
Product Height
19 Inches
Consumer Warranty
1 Year
UPC
879399000959
Model
MSH3125-S
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  16 Questions
Q: What's the dimensions of the box it comes in? Thanks
by Dave from New York on July 10, 2016

A: The shipping box is 33 inches long by 21 inches wide by 19 inches high.
by Brian, Product Expert
Q: Mike,
2 questions:
Wood piers and plastic decks- is this to much pressure for treated wood and plastic decks?

The pressure washer comes with 25' of hose.
if i want to add another 25 or 50' to existing hose do
i need an adapter. If so what is the part number and price.

by Bill Holmes from Illinois on July 04, 2016

A: It would work well for either application and have included the hose information for the extension.

http://www.pressurewashersdirect.com/Simpson-41182/p65405.html
by Brian, Product Expert
Q: Does it have a safety or control release valve to protect the pump?
by Randall Beem from Missouri on June 30, 2016

A: The pump does have a thermal relief valve which will pop if the water inside the pump gets too hot. It is not good for this to have to pump as it meant the seals could have already been prematurely worn from heat.
by Brian, Product Expert
Q: Hi Mike,

I'm looking for pressure washer with 3000 psi, because that's what was recommended to me in order to use a telescopic 25'+ wand with it effectively. Thing is, I'd like to get a unit that has a 3/4" hose. I like the stats on the Simpson MegaShot 3100 PSI (Gas-Cold Water) Pressure Washer With Honda Engine, as well as the price, but it comes with a 1/4" pressure hose.

Can I buy a 50' or even a 100' 3/4" hose and use it with this machine instead? In other words, will it still connect to this machine and gun or no? Do you have a suggested unit that's better, at a similar price? One you recommend? I will be using this annually on my house, deck, fence and drive with sidewalk. Residential, but want it to last, if that helps.

Thanks,
Gordon

by Gordon from Georgia on July 19, 2015

A: Yes, you could purchase a 100 FT hose to use with the unit. However, those hoses are quick connect and would require you purchasing 2 adapters to attach it. You would need adapter model D10037 and D10088. I have attached links for you to view both adapters and the 100FT hose I would recommend.

Adapter D10037

Adapter D10088

100FT High Pressure Hose
by Brian, Product Expert
Q: This pressure washer works fantastic. The only problem is that it shakes so much that the spray tips come out of the holders. When using on concrete the machine will just spin around. What can I do to stop the movement?
by George from Iowa on June 14, 2015

A: Unfortunately, there is no way to stop the vibration of the unit while in operation. However, you will have to make sure you are constantly spraying water. This should cause the unit to not vibrate as much and is not damaging the pump. when the unit is left in idle for to long, the water will heat up and damage the pump seals.
by Brian, Product Expert
Q: how many cc's is the motor?
by Bob from New Jersey on June 07, 2015

A: This unit uses a Honda GC190 which is 190CC's
by Brian, Product Expert
Q: Does this power washer come with the oil for the pump and engine when I make my order?
by Chris Janz from Louisiana on May 04, 2015

A: The pump is sealed (no maintenance of oil) and will be shipped with oil in it. This will also come with a quart of oil shipped with it for the engine. There may be some residual oil in the engine from when it is tested at the factory so we recommend to check the level and add as needed (be sure not to overfill).
by Brian, Product Expert
Q: Can you adjust the pressure?
by George from Massachusetts on April 08, 2015

A: This unit does not have adjustable pressure at the pump, however, it is just a matter of choosing the right colored spray tip for your application.
0 DEGREE (RED TIP)
15 DEGREE(Yellow TIP)
25 DEGREE (Green Tip)
40 DEGREE (White Tip)
Soap Applicator (Black tip)
A. 0 DEGREE - BLASTING
B. 15 DEGREE - STRIPPING
C. 25 DEGREE - CLEANING
D. 40 DEGREE – WASHING
E. 60 DEGREE- SOAP APPLICATION
by Brian, Product Expert
Q: Can this or any pw work with gravity fed water? I would hook it up to a 45gallon water tank not a faucet under pressure.

Thanks

by Rick from Arizona on February 02, 2015

A: No, this unit needs to be attached to a water source with a Min of 20 PSI and 3GPM. The only units that can be gravity fed are the belt drive units.
by Brian, Product Expert
Q: On the Simpson Megashot 3100- if i order it can i get 50 feet of hose with it?
by Peter from Connecticut on July 22, 2014

A: You can order an extension with it to make your hose 50 feet total. This will come with the necessary adapter to join the two hoses together.

25' Extension Hose

You can also purchase a separate 50 foot hose.

50' High Pressure Hose
by Brian, Product Expert
Q: Can I use the MTM Hydro 3.0 Turbo Tip Nozzle on the Simpson Model MSH 3125-S Washer ?
Also, where do I find a tank for the cleanser so the siphon tube can go into and does it mount to the washer ? Thanks a lot

by Pat from New Jersey on July 14, 2014

A: Yes the MTM 3.0 orifice turbo nozzle would be the correct item for you. We do not sell add on detergent tanks here. I would recommend reaching out to the folks at Simpson to see where one can be purchased. Their number is 877-362-4271
by Brian, Product Expert
Q: Does the Simpson 3100 have a container to put cleaning detergent in.
by Jason from Louisiana on March 09, 2014

A: No this unit does not have a detergent tank. It comes with a downstream injection system, which is a siphon hose running off the pump. You would put the siphon hose in a detergent of your choice and it would draw chemicals when using the black tip.
by Brian, Product Expert
Q: I bought a Simpson 3100 from Sam's that was the display model, when I got home there were no spray nozzles. I think the bag blew out of the pickup. Anyway, I need to get tips for the sprayer, a model MSV3100 p/n 60464. Are tips available separately?
by John Owens from New Mexico on August 30, 2011

A: Yes, there are definitely spray tips available for purchase. I am posting a link below to the correct size tips you would purchase for that model:

3.0 Orifice Spray Tips
by Brian, Product Expert
Q: I'M CONCIDERING BUYING A SIMPSON 3100 MODEL MSV3100. DON'T KNOW ANYTHING ABOUT PRESSURE WASHERS.
I'M A FARMER AND I WILL USE IT AS AN ALL AROUND PURPOSE WASHER. IS THIS A GOOD PRESSURE WASHER

by LARRY GUNTER from South Carolina on March 26, 2011

A: Simpson is one of the first and largest pressure washer manufacturers in the U.S. and they make great quality pressure washers. Also, this model has a Honda engine installed on it which is one of the most reliable small engines available for pressure washers. You can definitely use this model pressure washer as an all purpose machine that would be capable of handling a variety of tasks
by Brian, Product Expert
Q: I have moss buildup on my concrete patio which is very thick. I need a pressure washer that will clean down to the concrete in a fairly short period of time. I've used the 2600 psi versions before but they do not cut it. Any advice?
by Robert Olsen from Washington on March 26, 2011

A: I would definitely recommend using a pressure washer with at least 3000 psi. A 3000psi pressure washer is normally sufficient for cleaning concrete. Given the amount of moss build up that you have and depending on how large of an area you have to clean, you might want to purchase a pressure washer with a psi rating between 3400-4000 psi to complete the project as fast as possible.
by Brian, Product Expert
Q: I bought a 3100 psi Simpson PW @ Sam's Club. Can I get a 50 foot hose with fittings for this machine from you/Simpson?
by Bert Solomon from South Carolina on March 26, 2011

A: Yes, we carry a 5/16" 50' hose by Legacy.

I posted a link below to the hose I am referring to:

Legacy 50' High Pressure Hose
by Brian, Product Expert
Simpson MSH3125-S Reviews & Ratings
Overall Rating
Features
4/5
Quality
4/5
Performance
5/5
Value
4/5
Overall
4.5 out of 54.5 out of 54.5 out of 54.5 out of 54.5 out of 5
Pros
Easy To Use (154)
Price (108)
High Quality (86)
I'd Buy It Again (78)
Reliable (63)
Cons
none (36)
Packaging (15)
Low Quality (13)
Unreliable (12)
Durability (7)
88% of respondents would recommend this product to a friend
412 Reviews  Sort by 
 
Brian, the Pressure Washer Expert
Pressure Washer Expert

Product Expert
Total Reviews
122 Reviews
Total Helpful Votes
6319 Helpful Votes
Pressure Washers Direct Recommended

The MSH3125-S Simpson unit has a durable Honda GC engine, which has earned it's place at the top of the small engine heap for being quieter and easier to start than other engines in its class.

Amongst all of the consumer-grade pressure washers we carry, this model has been by far the most reliable and durable pressure washer in this category.

Put it all together and you wind up with a very versatile pressure washer at a very reasonable price.
Brian Recommends This Model
Was this review helpful?
69628
Chad W.
Doral, FL
Purchased from Pressure Washers Direct
Purchased 12/1/14
Total Helpful Votes
31 Helpful Votes
Most Helpful Positive Review
REVIEWED
DEC.
29
2014
5 out of 55 out of 55 out of 55 out of 55 out of 5
Exellent Product
Very very powerful. Great price, starts easy and light on gas.
View Image
Pros: Easy To Use, Price, Easy To Store, I'd Buy It Again
Cons: Should Of Come With Ah Longer Wand
Chad Recommends This Simpson Product
Chad's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"Very fast shipping, good communication."
 more
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3118
Paul N.
Huntington, MA
Purchased from Pressure Washers Direct
Purchased 8/22/16
Most Helpful Critical Review
REVIEWED
NOV.
26
2016
3 out of 53 out of 53 out of 53 out of 53 out of 5
Product Failed Miseably
Purchased this product after much research. Needed it for one specific job. Worked great until I shut it off and could not start it again. Very disappointed. Honda was always my motor of choice. This has got me in a spot with a half finished job.
Pros: Easy To Use
Cons: Unreliable
Brian, the Pressure Washer Expert
Product Expert
Paul,
I am so sorry you're having problems re-starting the unit! 2 quick things to try- pull the spray gun trigger and let water run through the gun before you try to start it. This drives out any air from the pump and clears up vapor lock that will stop the engine from turning over.

The other thing to quickly try is to loosen the gas cap & let air in the tank before starting the engine. Sometimes debris will block the vent in the gas cap. As gas is used it creates a vacuum in the tank and starves the engine of gas. If this is the case you may be able to clear the vent with a paperclip, or call the folks at Simpson at 877-362-4271 for a replacement cap.

If neither of these quick-fixes helps, please give the folks at Simpson a call (877-362-4271) for further troubleshooting. Please also have the serial number of your pressure washer handy when you call them in case they ask for it.

We appreciate your business, and apologize for any inconvenience.
more
Manufacturer Response
Brand Rep
Paul,
First and foremost thank you for your purchase of one of our Simpson pressure washers. We apolgoize for any issue you may be having and would like to help rectify the situation. If you could please contact Zac Dawson @ zdawson@fna-group.com he will be more than happy to help.

We look forward to helping.

Regards,

Simpson Pressure Washer Team
more
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70
Mark R.
Winter Garden, FL
Purchased from Pressure Washers Direct
Purchased 9/30/17
REVIEWED
OCT.
11
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Awesome Machine, Quick Assembly, Easy To Operate
So far I really like the machine, quickly assembled and operated in no time, well built and easy to maneuver around. The machine is powerful enough to do cleaning all around the house. Stop wasting money by calling a pressure washer guy every year, now the right machine to do the job! You can watch my YouTube unboxing and using it.
View Image
Pros: Features, Easy To Use, Light Weight, Reliable
Mark Recommends This Simpson Product
Mark's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"Very fast shipping! These guys don’t play games at all, they are straight to the point and honest on their products, they tell you exactly what they have and tell you exact price out the door, love it. No games! Great great place to buy and do business in future. Certainly will be buying from in future."
 more
Was this review helpful?
00
Alex K.
Orangevale, CA
Purchased from Pressure Washers Direct
Purchased 5/11/17
REVIEWED
MAY.
25
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Right Out Of The Box Magnificent!!!!!
I was worried that the assembly would take hours..not too much! 15 minutes. So easy. Hooked it up added oil and gas and started the projects.

The power of this unit was great. Using it again....looking for things to clean:)
View Image
Pros: Easy To Use, Price, I'd Buy It Again, Light Weight
Cons: NONE
Alex Recommends This Simpson Product
Alex's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"Any power equipment needs this is the place. Very helpful."
 more
Was this review helpful?
10
Craig Y.
Cumming, GA
Purchased from Pressure Washers Direct
Purchased 5/2/15
Total Reviews
2 Reviews
Total Helpful Votes
24 Helpful Votes
REVIEWED
MAY.
23
2015
4 out of 54 out of 54 out of 54 out of 54 out of 5
Bad Start Good Ending
When the box arrived the top of the box showed oil had soaked through it. Yes, oil... After opening it up I had determined that the oil filler cap was loose, causing whatever oil remained in the engine compartment to come out. The instructions said the engine is empty of oil but I wouldn't expect it to be completely empty. I also wouldn't' expect it to have that much oil in it. I would also expect that handlers would read the side of the box that says "This end up"!

Anyway,... more
View Image
Pros: I'd Buy It Again, Light Weight
Cons: Packaging
Craig Recommends This Simpson Product
Craig's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"I rated the shipping as 5 stars because pressure washers direct shipped it very quickly. However, after receiving a box that was turned upside down at some point during the storage or shipment I would buy it locally next time. I would prefer to have the opportunity to inspect it before taking delivery."
 more
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235
Chad J.
Purchased from Pressure Washers Direct
Purchased 4/9/17
REVIEWED
MAY.
01
2017
4 out of 54 out of 54 out of 54 out of 54 out of 5
Initial 2.5hrs Of Use & Pump Breaks
Great Honda motor, but the pump is made of composite metals that make it not as strong as other pumps on market. I didn't know this until using it for 2.5hrs and the bolt that keeps the pump together was snapped off by pressure and heat. My job was just over half done. It is currently being serviced at a warranty shop nearby. However, the same crappy pump will be put back on it.

Sales guy said you really want an all brass pump, its the only kind they sell. It handles the heat way better. He... more
View Image
Pros: Easy To Use, Light Weight, Fast, Quality motor
Cons: Low quality pump
Chad's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"Very easy experience and easy to get product fixed. No issues with PWD."
 more
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51
Jason L.
Maurice, LA
Purchased from Pressure Washers Direct
Purchased 9/25/17
REVIEWED
NOV.
06
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Product For The Price
Very powerful for the price. Have only had it a few weeks with one tank of gas burned but very impressed so far. This product far exceeded my expectations compared to other machines I’ve used in the past in the same price range. Great machine for residential use. If you are looking for a pressure washer for commercial use this probably isn’t the one for you. The cart could be a little better quality, but if stored out of the weather should be fine for many years.
Pros: Easy To Use, Price, Light Weight, Exceeded Expectations
Cons: none
Jason Recommends This Simpson Product
Jason's Experience With Pressure Washers Direct
Web Site
5/5

Service
5/5

Shipping
5/5
"Fast and free shipping. Best prices around."
 more
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00
George D.
Bradenton, FL
Purchased from Pressure Washers Direct
Purchased 10/10/17
Total Reviews
2 Reviews
REVIEWED
NOV.
02
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
"big Boy" Of Pressure Washers
Well built, well balanced, and easy to store. Have not actually used it yet, but it looks better than the pictures. I have no doubt, that coupled with a Honda engine, it will give years of service.
Pros: Price, High Quality, Easy To Store, Exceeded Expectations
Cons: Packaging
George Recommends This Simpson Product
Was this review helpful?
00
Archie Shaver
Millwwod, WV
REVIEWED
JAN.
20
2017
2 out of 52 out of 52 out of 52 out of 52 out of 5
Engine Defect
After a couple of dozen uses the pull cord started recoiling back to the engine with a tremendous amount of force. It nearly broke my hand. I read on other reviews that there is a common engine defect with the exhaust valve. I bought this because of the reputation of Honda engines. I'm very disappointed.
Pros: Features
Cons: Unreliable
Brian, the Pressure Washer Expert
Product Expert
Archie,
It's a good idea to let the water run through the spray gun for a minute or two each time before you try to start the engine. This drives all of the air out of the pump, making it easier for the engine to turn over since the pump and engine are connected directly.

If you continue to have problems with the Honda GC engine while it's in the 2 year Factory Warranty period please contact the Honda Small Engine service location in your area. You may find this link to the Honda Small Engine Service Locator helpful.

We don't recommend trying to service the engine yourself during the Factory Warranty period since it might void the warranty.
more
Manufacturer Response
Brand Rep
Archie,
Hello my name is Zac and I am the Assistant Service Manager for the FNA Group who manufactures the Simpson line of gas pressure washers.
First and foremost thank you for your purchase of our Simpson Gas Pressure Washer; if you need further assistance please contact me directly at 1-847-621-8954 or via email at zdawson@fna-group.com. I would be more than happy to help resolve any issues or questions you may have.

Thank you
more
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61
Ken D.
Mobile, AL
Purchased from Pressure Washers Direct
Purchased 4/21/17
Total Reviews
2 Reviews
REVIEWED
MAY.
16
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Nice Product, However A Few Minor Irritations
Easy to use power washer. Love the Honda Engine, works very well and not many issues with it.

However, a few things to keep in mind:

1) The siphon hose attachment is somewhat difficult to find (not very good documentation on this), it's below where the water hose and the spray nozzle hose connect (you have to tilt the pressure washer at an angle to even locate it).

2) when using the quick connect on the attachments (that come with it) they don't really go on well. You have to... more
Pros: Price, High Quality, Reliable, Durable
Cons: Needs clarification on instructions, Needs better start rope/pulley
Ken Recommends This Simpson Product
Brian, the Pressure Washer Expert
Product Expert
Ken,
For the easiest time starting the engine, please be sure you are squeezing the spray gun trigger and letting water run for a minute or two before pulling the starter rope.

This drives all the air out of the pump, and allows the engine (since the engine and pump are directly connected) to turn over more easily. Air in the pump can cause vapor lock, making it very hard to get the engine started!
more
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30
Wayne J.
Pasadena, MD
Purchased from Pressure Washers Direct
Purchased 5/2/17
REVIEWED
MAY.
24
2017
5 out of 55 out of 55 out of 55 out of 55 out of 5
Nice Piece Of Equipment However Beware Of Hidden Costs
Amazingly quick delivery. Arrived as advertised and started on second pull. Called to ask about 100 ft hose and told it was on back order. Also asked about necessary conversion kit and was told to wait and order them together and there would be no shipping charges.

Well, I followed that instruction and was charged for the shipping and the kit did not include all the necessary adapters. I am on well water and the recommendation to use a short supply hose combined with the standard 25 foot... more
Pros: Easy To Use, High Quality, Light Weight, Easy To Store
Wayne Recommends This Simpson Product
Brian, the Pressure Washer Expert
Product Expert
Wayne,
I'm sorry you misunderstood our customer service rep's suggestion. They were trying to save you money, not hide anything. Pressure washers ship for free, and accessories ordered at the same time as a pressure washer also ship for free. Accessories ordered by themselves have shipping charges.

If you had ordered all your accessories with your pressure washer they all would have shipped for free.

Most pressure washer manufacturers do not recommend using a pressure washer with a well, since wells have a hard time keeping up with the 2 GPM (minimum) needed to keep the pump supplied with enough water. Starving the pump will result in poor performance and possible pump damage.

The M22 connectors on this unit are common; if you use M22 hoses then adapters are not necessary.
more
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20
Free Freight
  • Ships via FedEx Ground
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We currently CANNOT ship this product to Alaska, Hawaii or any destination outside of the United States
 


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