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

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Item # 1584543

$419.99

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This Item cannot be shipped to CA.

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Shop all DuroMax

Online Only

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

Item # 1584543

$419.99

$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

Brand	DuroMax
Country of Origin	Imported
Brand Compatibility	DuroMax
Engine Displacement	420cc
Engine Make	DuroMax
Engine Type	4-cycle
Features	4-Stroke
Fuel Capacity	1.75 gal.
Fuel Type	Gasoline
Gas/Gas And Oil Mix	Gas
Horsepower	16 HP
Model Compatibility	DuroMax models
Oil Capacity	37.2 oz.
Orientation	Horizontal
Product Type	Mower Engines
Primary Material	Aluminum
Product Height	16 in.
Product Length	20 in.
Product Weight	86 lb.
Product Width	16 in.
Recommended Oil Type	10W30
Warranty	1-Year Limited Factory Warranty
Manufacturer Part Number	XP16HPE

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

8 months ago

1 Answer

A: Hi Neighbor! Please contact the manufacturer.
8 months ago
Helpful?

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

9 months ago

1 Answer

A: Hi Neighbor! No, this is a horizontal shaft motor.
9 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?

2 years ago

Originally posted on duromaxpower.com

2 Answers

A: Due to varying types of testing DuroMax does not list horsepower ratings for our engines.
2 years 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.

0 reviews with 2 stars.

2 reviews with 1 star.

Overall Rating

4.7

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

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installation
satisfaction
purchase
starting
price
quality
noise level
performance

1 to 4 of 47 Reviews .

1 – 4 of 47 Reviews

Cafetero

Puerto Rico

Review 1

5 out of 5 stars.

Torque

a year 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

Midwest Modified Toys

Minnesota

Review 1

5 out of 5 stars.

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

HOTROD

TUCSON AZ

Review 1

5 out of 5 stars.

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

JD SERVICES

MOBRIDGE, SD

Review 1

5 out of 5 stars.

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

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

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

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.?

Q: This is a counter clockwise engine ?

Q: shaft rotation

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?

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

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

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

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?

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

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

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.?

Q: This is a counter clockwise engine ?

Q: shaft rotation

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?

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

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

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

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?

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Reviews

Rating Snapshot

Overall Rating

Review this Product

Torque

Engine review (I own 5)

OUTSTANDING 420 CC ENGINE

NEW ENGINE