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4.7 out of 5 stars. 47 reviews
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DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine

4.7

(47 Reviews)

|

Item # 158454399

$419.99
A woman outside with a dog
A woman outside with a dog

DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine

DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine

Item # 158454399

DuroMax DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine
DuroMax DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine

Free delivery

Discount applied in cart

$419.99
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or
Notice:
This Item cannot be shipped to CA.
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DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine

Item # 158454399

DuroMax DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine
DuroMax DuroMax 420cc 1 in. Shaft Gas-Powered Recoil/Electric Start Engine

Free delivery

Discount applied in cart

$419.99
or
or
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$35/mo.†  suggested payments with 12 Months Financing or earn $20 in Rewards+ on this purchase.

This item is available online only

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The DuroMax XP16HPE is our medium sized engine that offers the flexibility of being lightweight and powerful; this 420cc 4-stroke OHV engine has plenty of power for multiple medium-duty applications including go karts, pressure washers, trailer mounted-mobile carwashes, log splitters, roto tillers- cultivators, and water/trash transfer pumps. This engine is equipped with convenient features like a large 1.75-gallon fuel tank for longer runtimes, an electric start option for easier startups, an E-Z Pull Recoil Starter for startup flexibility, and EPA and CARB approved for safe mandated use.1-Year Limited Factory Warranty

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.

Looking for more information on lawn mower maintenance? Check out our guide on lawn mower maintenance in the product documents section.

  • 420cc 4 Stroke OHV engine
  • Large 1.75 gal. Fuel Tank
  • Runs on Standard 87 Octane Gasoline
  • Electric Start Key Switch Box
  • Alternate Start System: E-Z Pull Recoil Starter
  • Air Cleaner: Dual, Semi-dry, Oil Bath
  • EPA and CARB Approved for Safe Mandated Use
  • Applications: Go Karts, Pressure Washers, Trailer Mounted - Mobile Carwashes, Log Splitters, RotoTillers - Cultivators, Water/Trash Transfer Pump

Q&As

1 - 10 of 43 Questions

Q: is the size of the shaft on this engine 1 inch by 2inches 29/32, if not what size Duromax engine would have that size shaft

6 months ago
1 Answer
  • A: Hi Neighbor! Please contact the manufacturer.
    6 months ago
    Helpful?

Q: Can you confirm that this is a vertical shaft motor? Thank you.

7 months ago
1 Answer
  • A: Hi Neighbor! No, this is a horizontal shaft motor.
    7 months ago
    Helpful?

Q: I just received this motor. While waiting for it to arrive, I read the specs, specifically the oil type. Specs say 10W30. So I went and purchased what the specs recommended. Motor arrives with tag tha say 30W. Are specs right or motor right.?

a year ago
1 Answer
  • A: Hi John, please see the manual for full specifications 10W30 is a multigrade oil, meaning it has a thinner viscosity at cold temperatures (10W) and a thicker viscosity at higher operating temperatures (30W). 30W, on the other hand, is a monograde oil, meaning it has a consistent viscosity regardless of temperature.
    a year ago
    Helpful?

Q: This is a counter clockwise engine ?

a year ago

Originally posted on duromaxpower.com

1 Answer
  • A: The XP16HPE has a counter-clockwise rotation for the crankshaft, yes.
    a year ago

Q: shaft rotation

a year ago

Originally posted on duromaxpower.com

1 Answer
  • A: This engine will have a counter-clockwise shaft rotation.
    a year ago

Q: I have a 16hp duromax electric/manual start. Can I get a wiring diagram for this? troubleshooting guide for the charging system? What is the amp/volt output of the charging system?

a year ago

Originally posted on duromaxpower.com

1 Answer
  • A: Yes, the service manual and owners manual will have a copy of the wiring diagram that would be available upon request with a troubleshooting section. The engine will output about a 1.5 Amp charge. Please see the product manual here: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://cdn.shopify.com/s/files/1/0613/1168/0689/files/XP16HPE_manual_rev02032023_WEB.pdf?v=1676052931.
    a year ago

Q: What is the horsepower rating of the DuroMax XP16HPE? 16?

a year ago

Originally posted on duromaxpower.com

2 Answers
  • A: Due to varying types of testing DuroMax does not list horsepower ratings for our engines.
    a year ago

Q: Why is it when I start it up, it goes straight to Wide Open Throttle, any ideas?

2 years ago

Originally posted on duromaxpower.com

2 Answers
  • A: We apologize for the confusion. The throttle lever might be set to high based on the description. If you move the throttle lever the opposite way it should slow the engine down as desired.
    2 years ago

Q: Does this engine have the same shaft size and base footprint as the Honda GX390 13 hp engine?

2 years ago

Originally posted on duromaxpower.com

1 Answer
  • A: Yes, this model will have the same dimensions for the shaft and base plate for most versions of the GX390. Please note some versions of the GX390 have different shaft types that may vary.
    2 years ago

Q: do the 420 and the 440 share parts? if so what's the difference ? Is it the cam profile, combustion chamber size or the stroke?

3 years ago

Originally posted on duromaxpower.com

1 Answer
  • A: The 420 and 440 cc engine do have some compatible parts but not everything. For more information on this, contact Duromax at 844-387-6629.
    3 years ago
1 - 10 of 43 Questions

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Reviews

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42 reviews with 5 stars.
1 review with 4 stars.
2 reviews with 3 stars.
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2 reviews with 1 star.

Overall Rating

4.7
13 out of 13 (100%) reviewers recommend this product

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  • installation
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1 to 4 of 47 Reviews .
1 – 4 of 47 Reviews
Puerto Rico
Review 1

Torque

10 months ago
I installed this engine to my BCS 749 replacing the Honda gx390, works way better and smoother.

Yes, I recommend this product.

Originally posted on duromaxpower.com

Minnesota
Review 1

Engine review (I own 5)

a year ago
Always a good running engine out of the box. Start good in the cold for snowblower use. Always happy with there performance.

Yes, I recommend this product.

Originally posted on duromaxpower.com

TUCSON AZ
Review 1

OUTSTANDING 420 CC ENGINE

2 years ago
420 CC DUROMAX ELECTRIC START INSTALLED IN MY TRAILMASTER MB 200 MINI BIKE LOTS OF WORK THIS ENGINE IS A POWER HOUSE

Yes, I recommend this product.

Originally posted on duromaxpower.com

MOBRIDGE, SD
Review 1

NEW ENGINE

2 years ago
FAST SHIPPING, WAS EASY INSTALL, VERY SATISFIED!! WOULD BUY AGAIN

Yes, I recommend this product.

Originally posted on duromaxpower.com