StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › DuroMax › ATV Engines
DuroMax
DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine

DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine

3.8(4 ratings)

Best price now

$549.00at WalmartChecked 2 h ago

Compared across 11 stores. Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Lowest price today: $549.00 at Walmart (checked Nov 12, 2026).
  • Checked at 11 stores.

Our take on the DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine

The DuroMax XP18HPX is a 439cc 4-stroke OHV engine that runs on gasoline or propane. It is DuroMax's largest dual-fuel engine, aimed at heavy-duty jobs like log splitters, pressure washers, go karts and trash pumps. It starts with a keyed electric starter or a pull recoil, and it carries a 1.4-gallon gas tank plus a propane hose and regulator. Against smaller single-fuel engines it offers more displacement and fuel flexibility, but it weighs more and needs a 12V battery for electric start.

Best forLog splitters and rototillersGo karts and off-road buildsPressure washers and mobile carwash rigsWater and trash transfer pumps
Pros
  • Runs on gasoline or propane
  • Keyed electric start plus recoil backup
  • Large 1.4-gallon fuel tank
  • Propane hose and regulator included
  • EPA and CARB approved
  • 3-year limited factory warranty
Cons
  • Heavy and bulky for small frames
  • Electric start needs a 12V battery, sold separately
  • No fuel shutoff or low-oil shutdown listed
  • Propane runtime depends on tank size

DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine prices at every store

  • WalmartNew

    In stockSold by MaxTool

    $549.00Free shippingChecked 2 h ago
    Visit Walmart
  • DuroMax Power EquipmentNew

    In stock

    $549.00Free shippingChecked 2 h ago
    Visit DuroMax Power Equipment
  • Home DepotNew

    In stock

    $549.00Free shippingChecked 2 h ago
    Visit Home Depot
  • Max ToolNew

    In stock

    $549.00Free shippingChecked 2 h ago
    Visit Max Tool
  • JBTools.comNew

    In stock

    $549.00Free shippingChecked 2 h ago
    Visit JBTools.com
  • Factory Authorized OutletNew

    In stock

    $549.00Free shippingChecked 2 h ago
    Visit Factory Authorized Outlet
  • Krato PowerNew

    In stock

    $549.00Free shippingChecked 2 h ago
    Visit Krato Power
  • Northern ToolNew

    In stock

    $609.99Free shippingChecked 2 h ago
    Visit Northern Tool
  • Neobits.comNew

    In stock

    $583.94+ $125.00 shippingChecked 2 h ago
    Visit Neobits.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $549.00Free shippingChecked 2 h ago
    Visit Amazon
  • Tractor Supply CompanyNew

    Out of stock

    $599.99Free shippingChecked 2 h ago
    Visit Tractor Supply Company

Also available at

  • WalmartCheck price at Walmart

Store links may earn us a commission.

DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine price history

Lowest price we've seen: $549.00 on Nov 13 at DuroMax Power Equipment. Tracked across 11 stores since Nov 13.

About the DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine

The DuroMax XP18HPX is a 439cc, 4-stroke, OHV dual fuel engine with a horizontal shaft. It runs on standard 87 octane gasoline or propane. A propane hose and regulator are included.

It starts with either an electric key switch or an E-Z pull recoil starter. The fuel tank holds 1.4 gallons. The engine uses forced-air cooling, a cast iron sleeve and stainless steel ball bearings.

It is suited to go karts, pressure washers, trailer-mounted mobile carwashes, log splitters, rototillers and cultivators, and water and trash transfer pumps.

Engine type
4-stroke, OHV
Displacement
439cc
Bore x stroke
92 mm x 66 mm
Max output
4000 rpm
Max torque
35.6 N @ 2500 rpm
Cooling
Forced air
Fuel types
Gasoline (87 octane), propane
Fuel delivery
Carburetor
Fuel tank
1.4 gallons
Runtime
About 2 hours on gasoline; about 8 hours on propane (40 lb)
Starting
Electric start with key switch, and E-Z pull recoil start
Shaft
Horizontal, 1" diameter, 2.84" long, 1/4" keyway
Shaft end
3/8" size 24 UNF, drilled and tapped
Shaft rotation
Counter-clockwise
Shaft center to base
5.31"
Air cleaner
Dual, semi-dry, oil bath
Bearings
Stainless steel ball bearings
Cylinder sleeve
Cast iron
Oil capacity
37.2 fluid oz.
Oil system
Splash lubrication
Recommended oil
10W-30 (blended, conventional or synthetic)
Emissions
EPA certified; not CARB certified; not 50-state
Dimensions
19.29" L x 13.98" W x 18.11" H
Weight
79 lbs
Color
Red
Warranty
3-year limited factory warranty
In the box
Engine, 12V battery leads, propane hose with propane regulator, propane inlet cap, owner's manual

Specifications

color
RedSource

Questions and answers

Can it run on propane only?
Yes. It runs on standard 87-octane gasoline or propane, and the propane hose and regulator are included. Propane avoids fuel going stale in the tank.
What shaft size does it have?
It has a 1-inch horizontal shaft, the common size for log splitters, pressure washers and pumps. Check your equipment's coupling before buying.
Does electric start work out of the box?
The engine comes with 12V battery leads, but you supply the battery. The keyed starter and the recoil pull starter both work once a charged battery is connected.
Is it legal in California?
Yes. It is EPA and CARB approved, so it can be sold and used in all 50 states.
What is in the box?
The engine, 12V battery leads, propane hose with regulator, propane inlet cap and owner's manual.
What is the warranty?
DuroMax covers it with a 3-year limited factory warranty and a 30-day satisfaction guarantee.
Where is the DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine cheapest?
At Walmart, for $549.00, as of our latest check.
What do buyers say about the DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine?
Rated 3.8 out of 5 from 4 ratings.
Where can I buy the DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine?
11 stores we checked sell it, including Walmart, Amazon, DuroMax Power Equipment, Home Depot, Max Tool.

Stores we've priced the DuroMax XP18HPX 439cc 1" Shaft Recoil/Electric Start Horizontal Dual Fuel Engine at

  • Factory Authorized Outlet deals and prices
  • Neobits.com deals and prices
  • Northern Tool deals and prices
  • The Home Depot deals and prices
  • Tractor Supply Company deals and prices
  • Walmart deals and prices
  • More from DuroMax

    • D
      DuroMax XP13750HX HX Generator
      DuroMax XP13750HX HX Generator
    • D
      DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator
      DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator
    • D
      DuroMax 15,500 Watt Dual Fuel Portable Generator
      DuroMax 15,500 Watt Dual Fuel Portable Generator
    • D
      DuroMax 13,500 Watt Portable Tri Fuel Inverter Generator
      DuroMax 13,500 Watt Portable Tri Fuel Inverter Generator
    • D
      DuroMax XP28000iH 28,000 Watt Dual Fuel Portable Inverter Generator
      DuroMax XP28000iH 28,000 Watt Dual Fuel Portable Inverter Generator
    • D
      DuroMax Generator + Enclosure Bundle
      DuroMax Generator + Enclosure Bundle
    • D
      DuroMax XP15500HX 15,500-Watt Dual Fuel Generator
      DuroMax XP15500HX 15,500-Watt Dual Fuel Generator
    • D
      DuroMax XP5500EH Dual Fuel Portable Generator
      DuroMax XP5500EH Dual Fuel Portable Generator
    All DuroMax deals and products →