Founded in 2003, American-owned DuroMax Power Equipment is a brand that is committed to excellence. Today, DuroMax is the industry leader in Dual Fuel Portable technology – we’ve achieved this by building our company based on quality, trust, and dependability.
A portable generator is an essential appliance – it is your lifeline in case of an emergency event. In addition to using the highest quality materials to ensure your generator’s durability, reliability, and longevity, we also include a 3-Year Warranty and 1-Year Commercial Warranty to our generators to protect your investment and offer you even greater peace of mind.
This warranty extends to other DuroMax products such as engines, pumps, and pressure washers. (*Does not include our cords and accessories. These come with a 30 Day Satisfaction Guarantee.)
Duromax 500cc 1-Inch Shaft Recoil Start Gasoline Engine | XP20HP
In Stock & Ready to Ship
All orders are shipped within 1-2 business days. Product ETA 7-14 business days.
The DuroMax XP20HP is our largest and most powerful single cylinder engine we offer; this 500cc 4-stroke OHV powerhouse is suitable for multiple heavy-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 1.35-gallon gas tank for longer runtimes, an E-Z pull recoil starter to start the engine with ease, and EPA and CARB approved for safe mandated use.
Key Features
- 500cc 4-Stroke OHV Engine: Our largest and most powerful single cylinder engine, perfect for projects that demand serious power.
Specifications
| Manufacturer | DuroMax Power Equipment |
| Part # | XP20HP |
| Engine Type | 4-Stroke |
| Valve Type | OHV |
| Engine Cooling Type | Forced Air |
| Displacement | 500 cc |
| Bore | 94 mm |
| Stroke | 72 mm |
| Max Output | 4000 rpm |
| Max Torque | 22.87 Ft/lbs (31 N·m) @ 2500 rpm |
| Shaft Orientation | Horizontal |
| Shaft Size | 1” diameter, 3.535” long, 1/4” keyway |
| Shaft End | 3/8” size 24 UNF – 2B drilled and tapped |
| Shaft Rotation | Counter-Clockwise |
| Measurement from Center of Shaft to Base | 5.26” |
| Fuel Tank Capacity | 1.35 gallons |
| Fuel Types | Gasoline |
| Fuel Delivery System | Carburetor |
| Average runtime on gasoline | 2 hours |
| Starting type | Recoil Start |
| Recoil Start | Yes |
| Cast Iron Sleeve | Yes |
| Bearing Type | Stainless Steel Ball Bearing |
| Oil Cooling Type | Splash |
| Oil Capacity | 40.5 fluid oz. |
| Recommended Oil | 10W-30 |
| Recommended Oil Types | Blended, Conventional, or Synthetic |
| Product Dimensions | 19” L x 17” W x 19” H |
| Weight | 77 lbs |
| UPC | 811640016869 |
| EPA Certified | Yes |
| CARB Certified | Yes |
| 50 State Emissions | Yes |
| Warranty | 3 Year |
| What's in the Box? | DuroMax XP20HP Engine, Spark Plug Wrench, Oil Funnel, and Owner’s Manual |
Warranty
Warranty Exclusions
The DuroMax Power Equipment warranty does not cover repairs or returns when the fault is: Normal Wear and Tear, Installation Use or Maintenance Services, Cosmetic defects, Accessories, Failures due to acts of God or Natural Disasters, or problems related to/from aftermarket or non-OEM parts.
Warranty Limitations
DuroMax Power Equipment does not claim or hold any obligation to loss of time, freight charges, use of product, or any incidental damages from the use of this product. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED.
U.S. EPA AND CALIFORNIA EMISSIONS CONTROL WARRANTY STATEMENT YOUR WARRANTY RIGHTS AND OBLIGATIONS
The U.S. Environmental Protection Agency (EPA), California Air Resources Board, and Imperial Industrial Supply Co. LTD. / DuroMax Power Equipment are pleased to explain the emissions control system’s warranty on your 2018 small off-road engine. In California, new equipment that use small off-road engines must be designed, built, and equipped to meet the State’s stringent anti-smog standards. DuroMax Power Equipment must warrant the emissions control system on your small off-road engine for the period listed below provided there has been no abuse, neglect, or improper maintenance of your equipment.
Your emissions control system may include parts such as: carburetors or the fuel injection system, ignition system, catalytic converters, fuel tanks, valves, filters, clamps, connectors, and other associated components. Also, included may be hoses, belts, connectors, sensors, and other emission-related assemblies.
Where a warrantable condition exists, DuroMax Power Equipment will repair your small off-road engine at no cost to you including diagnosis, parts, and labor.
MANUFACTURER’S WARRANTY COVERAGE:
This emissions control system is warranted for two years. If any emissions-related part on your equipment is defective, the part will be repaired or replaced by DuroMax Power Equipment.
OWNER’S WARRANTY RESPONSIBILITIES:
- As the small off-road engine owner, you are responsible for performance of the required maintenance listed in your owner’s manual. DuroMax Power Equipment recommends that you retain all receipts covering maintenance on your small off-road engine, but DuroMax Power Equipment cannot deny warranty solely for the lack of receipts or your failure to ensure the performance of all scheduled maintenance.
- As the small off-road engine owner, you should however be aware that the DuroMax Power Equipment may deny you warranty coverage if your small off-road engine or a part has failed due to abuse, neglect, or improper maintenance or unapproved modifications.
- You are responsible for presenting your small off-road engine to a DuroMax Power Equipment distribution center or service center as soon as the problem exists. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days.
- If you have any questions regarding your warranty coverage, contact us at 844-DUROMAX or email sales@buildthepower.com
DEFECTS WARRANTY REQUIREMENTS:
The warranty period begins on the date the engine or equipment is delivered to an ultimate purchaser and extends for a period of Two Years.
GENERAL EMISSIONS WARRANTY COVERAGE:
DuroMax Power Equipment warrants to the ultimate purchaser and each subsequent owner that the engine or equipment is:
Designed, built, and equipped to conform with all applicable regulations adopted by the Air Resources Board; and free from defects in materials and workmanship that causes the failure of a warranted part for a period of two years.
The warranty on emissions-related parts will be interpreted as follows:
Any warranted part that is not scheduled for replacement as required maintenance in the Owner’s Manual must be warranted for the warranty period stated above. If any such part fails during the period of warranty coverage, it must be repaired or replaced by the manufacturer according to Subsection (4) below. Any such part repaired or replaced under the warranty must be warranted for the remaining warranty period.
Shipping Policy
Our goal is to get your parts and products to you as efficiently and safely as possible. The guidelines below outline what you can expect about fulfillment, shipping, and eligible products.
Shipping and Order Fulfillment Guidelines
Order Fulfillment: Orders usually ship within 1-5 business days. Shipments generally arrive in 1-3 business days after leaving our facilities. Please note that no orders will be fulfilled on Saturday or Sunday; instead, they will be fulfilled the next business day.
Pick Up: You may choose to pick-up your order at no cost from any of our listed locations in the USA and Canada. As soon as the order is ready for pick-up, we will send you an email. Your order should be ready for pickup within 2 – 3 business days, depending on the availability of parts.
Shipping Address: Your shipping address may be either a residential or commercial address in the United States and Canada. We do not ship to P.O. Box addresses, and we do not ship to any addresses outside the USA and Canada.
Method of Shipping: Standard ground shipping is the default shipping method for the USA and Canada.* Once your product is shipped, it should take 1–3 business days for delivery. Standard shipping to Alaska and Hawaii typically takes 14–21 business days.
* Exceptions may apply in shipping to some states in the USA. Currently, Shop DuroMax does not offer shipping to US territories, Nunavut, Northwest Territories or Yukon.
Shipping Fees
Free Shipping: We offer free shipping on all orders.
Eligible Products
All products are eligible for Standard Free Shipping except for the product categories listed below. These products are eligible for Store Pick-Up Only:
Dangerous or hazardous goods, such as batteries
Products that require special handling, such as a pail of oil or coolant
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Returns and Refunds Policy
We are committed to providing a straightforward, hassle-free return process. Please read our policy to be sure your order qualifies.
If your product was damaged in shipping, or if you received an incorrect part please contact us so that we can assist you. Do not initiate a return for such orders.
Return Guidelines
Return Initiation
Your return must be initiated on Shop DuroMax. Please do not take your parts to a store without initiating the return online first as your returns will not be accepted.
Return Timeline
Eligible part returns can be initiated for up to 30 days from the shipment or pickup availability date. Returns must be received by the return location within 14 days of return initiation.
Return Method
You may return products either in-store to your original pickup location, or through mail. Drop off returns are only available if you picked up your products at a branch.
In-Store Return: Available only for pickup orders. You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will then have the option to return the product(s) to your original pickup location. You will be issued a Return Confirmation email as soon as you submit your return request. Please bring a copy of the packing slip from your return order along with the products. Note: If you purchased as a signed in user, make sure to sign into your account first.
Mail-In Return: You will need to initiate the return online first. Look up your order using your Order Number and email address and identify the product(s) you would like to return. You will be issued a Return Confirmation email as soon as you submit your return request. Include the packing slip with your parts that are being returned. Note: If you purchased as a signed in user, make sure to sign into your account first.
Product Condition
Products purchased on buildthepower.com must be returned in saleable condition — in other words, unused, in the original packaging, and undamaged. Please note, all accepted returns will incur a 15% handling fee.
Products that are Not Eligible for Return
Superseded and obsolete products or parts
Parts that were not purchased through the DuroMax Global Logistics (CGL) vendor base (such as special-order parts sourced directly from Power Gen suppliers, parts with unique customer specifications, etc.)
Parts not purchased from Build the Power and non-stocking parts
Piston pins except as part of piston or cylinder kits
Electronics (including but not limited to sensors)
Hazardous materials such as paints, sealants, flush kits, lubricants, spray cleaners and other materials
Consumable products
Software
Make-to-Order and Customized items (calibrated fuel pumps, custom specified radiators / alternators / mufflers /adapters / etc.)
Belts, service tools, and rebuilt or non-genuine parts
Printed circuit boards and other electronic components that were shipped in anti-static packaging which have been opened
Refund Policy
Handling Fees
All accepted parts returns will incur a 15% handling fee.
Return Label
You will be responsible for shipping the return package to the appropriate location. For US returns, we recommend you ship via FedEx to avoid potential delays. If you are returning a product because an incorrect part was shipped, or the product was damaged in shipping please contact us so that we can assist you.
Refund Timeline
Once we have approved the return, a refund will be issued within 7-10 business days.
