Duromax XP4400EH Generator Instruction Manual
Duromax XP4400EH Generator
Duromax XP4400EH Instructions
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Duromax XP4400EH Generator Specifications
| Feature | Specification |
|---|---|
| Model Number | XP4400EH |
| Fuel Type | Dual Fuel (Gasoline / Propane LPG) |
| AC Rated Wattage (Gasoline) | 3500 W |
| AC Rated Wattage (Propane) | 3325 W |
| AC Surge Wattage (Gasoline) | 4400 W |
| AC Surge Wattage (Propane) | 4180 W |
| AC Rated Voltage | 120/240 V |
| AC Rated Frequency | 60 Hz |
| AC Phase | Single |
| DC Voltage | 12 V |
| DC Amperage | 8.3 A |
| Dimensions (L x W x H) | 24 x 17 x 17 in |
| Engine Type | 4-Stroke OHV Forced-Air |
| Displacement | 212 cc |
| Ignition System | Non-Contact Transistor |
| Starting Type | Electric (Recoil Backup) |
| Starter Battery | 12 V DC |
| Fuel Tank Capacity | 4 US Gal (15 L), all-metal |
| Recommended Gasoline | Fresh unleaded, 87 octane or higher |
| Propane Supply Requirement | LPG source of 11 in. H2O or more |
| Oil Capacity | 20 fl oz (0.6 L) |
| Recommended Oil | SAE 10W-30 |
| Run Time @ 50% Load (Gasoline) | 10 hr |
| Run Time @ 50% Load (Propane) | 12 hr (30 lb tank) |
| Noise Level | <69 dB |
| 120/240 V Receptacle | 4-Prong Twist Lock (NEMA L14-30) |
| 120 V Receptacle | 3-Prong GFCI (NEMA 5-20) |
| AC Breaker | 20 A resettable |
| DC Breaker | 10 A resettable |
| Spark Plug | F6RTC (e.g., NGK BPR6ES) |
| Spark Plug Gap | 0.7–0.8 mm (0.028–0.031 in) |
| Warranty | 3-year parts (residential); 1-year commercial |
Duromax XP4400EH Generator Details
The Duromax XP4400EH is a dual fuel portable generator. It runs on gasoline or propane, and a front-panel inlet takes the included propane regulator and hose with its ACME connection. Only one fuel can run at a time. When you use propane, the gasoline valve must be closed, and when you use gasoline, the LPG supply must be shut off. Leftover gasoline in the carburetor can make the engine run unevenly for a few minutes after switching, so connect loads only once it runs smoothly.
A key feature is DuroMax's Power Boost Technology. A voltage selector switches the dual 120 V windings between "120/240V" and "120V ONLY". The "120V ONLY" setting doubles the available 120 V amperage and balances the load automatically, which helps with heavy loads like RV air conditioners. Change the selector only with the main AC breaker off. Changing it with the breaker on can seriously damage the generator.
The power panel has a voltmeter, a low oil alert light, a three-position Start/Run/Off engine switch and DC charging posts for 12 V automotive batteries. An automatic shutoff stops the engine when the oil is low. You should still check the dipstick before every use. Keep each starter attempt under 5 seconds, and wait 10 seconds before trying again. The recoil start works as a backup if the battery is weak.
Setup starts with removing the brightly colored shipping braces and a wooden brace from under the unit. Do this before adding any fuel or oil. The optional wheel kit includes support legs, an axle, washers, cotter pins and handles. The battery ships disconnected, so you need to attach the negative cable. Ground the generator with No. 12 AWG stranded copper wire run to a copper or brass rod driven into the earth.
If you always run the generator above 3,000 feet (900 m), have a dealer modify the carburetor. Even with the modification, engine power drops by about 3.5% for each 1,000 feet. A modified carburetor used below 3,000 feet can overheat the engine. Fill the gas tank no higher than 1.5 inches from the top. The fuel gauge may not register when the tank is less than one-third full.
The package includes a double-sided screwdriver, 10/12 mm and 13/15 mm spanners, a spark plug wrench, an oil funnel, the propane regulator hose, DC charging cables and plug ends for making your own cords. A wattage chart, cord gauge table and wiring diagram help with sizing loads and troubleshooting. Note that the manual's AC usage chart lists 4500/5500 W for gasoline and 4275/5225 W for propane. These figures differ from the spec sheet values shown above.
The maintenance schedule covers oil, the air cleaner, the sediment cup, the spark plug, the spark arrestor, valve clearance and the fuel tank. Clean the combustion chamber every 500 hours, check the fuel tube every 24 months and inspect the carbon brushes every 250 running hours. The foam air filter is washed in dish detergent and lightly re-oiled. The oil drain plug takes a 12 mm wrench. The manual also explains how to replace the AVR if overheating or overloading damages it.
Storage steps depend on how long the generator will sit. For storage longer than 30 days, drain the fuel tank and carburetor, put 2 tablespoons of 10W-30 oil into the cylinder and keep the battery on a tender indoors. Gasoline older than 30 days can damage the fuel system. The emissions control system has a separate two-year warranty, and DuroMax customer service is available at 844-DUROMAX.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Duromax XP4400EH Generator, and we answer them below.
