1-800-232-1195 (M-F 8AM-5PM CST) TECHSUPPORT@WENPRODUCTS.COM IMPORTANT: Your new tool has been engineered and manufactured to WEN’s highest standards for dependability, ease of operation, and operator safety. When properly cared for, this product will supply you years of rugged, trouble-free performance. Pay close attention to the rules for safe operation, warnings, and cautions. If you use your tool properly and for its intended purpose, you will enjoy years of safe, reliable service.
INTRODUCTION Thanks for purchasing the WEN 3800-Watt Inverter Generator. Refer to the illustration below for the location of the serial number on the side of the engine. Record the generator information in the spaces provided below. If assis- tance for information or service is required, please contact customer service by calling 1-800-232-1195, M-F 8-5 CST;...
WEN reserves the right to change this product and specifications at any time without prior notice. At WEN, we are continuously improving our products. If you find that your tool does not exactly match this manual, please visit wenproducts.com for the most up-to-date manual or contact customer service at 1-800-232-1195, M-F 8-5 CST.
GENERATOR SAFETY WARNINGS DANGER! CARBON MONOXIDE Using a generator indoors CAN KILL YOU IN MINUTES. Generator exhaust contains carbon monoxide (CO). This is a poison gas you cannot see or smell. If you can smell the generator exhaust, you are breathing CO. But even if you cannot smell the exhaust, you could be breathing CO.
GENERATOR SAFETY WARNINGS WARNING! Do not let comfort or familiarity with the product replace strict adherence to product safety rules. Failure to follow the safety instructions may result in serious personal injury. OPERATING ENVIRONMENT 3. If any part of the generator, electrical device or pow- er cord is broken, damaged, or defective, make sure 1.
GENERATOR SAFETY WARNINGS WARNING! Do not let comfort or familiarity with the product replace strict adherence to product safety rules. Failure to follow the safety instructions may result in serious personal injury. TO MAXIMIZE THE LIFESPAN OF YOUR GENERATOR: We recommend running your generator at least once a month for 20 to 30 minutes.
UNPACKING & PACKING LIST UNPACKING With the help of a friend or trustworthy foe, such as one of your in-laws, carefully remove the generator from the packaging and place it on a sturdy, flat surface. Make sure to take out all contents and accessories. Do not discard the packaging until everything is removed.
KNOW YOUR INVERTER GENERATOR TOOL PURPOSE Inverter Generators provide you with clean and quiet power, when and where you need it most. Refer to the fol- lowing diagrams to become familiarized with all the parts and controls of your Generator. The components will be referred to later in the manual for assembly and operation instructions.
Turn switch to start, run, and automatically shut off the 6. Parallel Connection Port generator Connect two WEN inverter generators through a parallel connection kit for a higher output. 14. Engine Start Button Turn switch to "Start" and press button to ignite the en- 7.
GENERATOR PREPARATION REMOVING THE MOUNTING PLATES Your generator is shipped with four mounting plates that secure the engine to the generator housing in order to prevent machine damage during shipping. Make sure to remove the four mounting plates before operating your generator.
GENERATOR PREPARATION The following section describes the necessary steps to prepare the generator for use. If you are unsure about how to perform any of the steps, please call (800) 232-1195 M-F 8-5 CST for customer service. Failure to perform these steps properly can damage the generator or shorten its life.
The oil level of the engine should be checked before each Upper Limit start to ensure that the engine crankcase contains suf- ficient lubricant. TIP: Your WEN generator is compatible with the WEN 55201 Magnetic Oil Dipstick (not included), available Lower Limit for purchase at wenproducts.com. The dipstick’s in- dustrial-strength magnetic tip will collect metal shav- ings from your generator’s oil compartment to help...
GENERATOR PREPARATION STEP 2 - ADD / CHECK FUEL WARNING! RISK OF EXPLOSION. HIGHLY FLAMMABLE: This generator may emit highly flammable and explosive gasoline vapors, which can cause severe burns or even death, if ignited. A nearby open flame can lead to explosion even if not directly in contact with gasoline.
GENERATOR PREPARATION STEP 4 - CONNECT THE BATTERY WARNING! Use only genuine WEN batteries with your generator (part no. 56380i-1304). Use of other bat- teries may induce premature product failure and could pose a safety risk. ABOUT THE BATTERY 1. The lithium-ion battery supplied with your generator is only partially charged, in order to maximize its service life.
GENERATOR PREPARATION To connect the battery: Fig. 7 1. Using a quarter coin or flat-head screwdriver (not includ- Battery ed), open and remove the battery access cover (Fig. 7). Access 2. Loosen the rubber belt and pull out the battery. Cover 3.
You can order the kit at wenproducts.com by searching part 56380i-HA. There are two kits - one for altitudes be- tween 3000 and 6000 feet (56380i-HA36), and the other for altitudes from 6000 to 8000 feet (56380i-HA68). This kit should be installed by a qualified mechanic.
STARTING YOUR GENERATOR Before starting the generator, make sure you have read and performed the steps in the “Generator Preparation” section of this manual. If you are unsure about how to perform any of the steps in this manual please call 1-(800) 232-1195 M-F 8-5 CST for customer service.
STARTING YOUR GENERATOR BEFORE STARTING THE GENERATOR 1. Verify that generator is outside on a dry, level surface with at least two feet of clearance on all sides. 2. To maximize safety, check that the generator is properly grounded (see “Ground the Generator”). 3.
USING YOUR GENERATOR CALCULATING THE WATTAGE OF YOUR DEVICE(S) Connect electrical devices running on AC current according to their wattage requirements. Calculate the total run- ning wattage and starting wattage of the device(s) you wish to connect, and MAKE SURE that they are within the capacity of your generator and the capacity of each individual outlet.
USING YOUR GENERATOR CALCULATING THE WATTAGE OF YOUR DEVICE(S) - CONTINUED The chart below serves as a reference for the estimated wattage requirements of common electrical devices. How- ever, do not solely rely on this chart - all electronics and appliances are built differently. Always check the wattage listed on the electrical device before consulting this chart.
USING YOUR GENERATOR CONNECTING ELECTRICAL DEVICES When the rated wattage requirement of each electrical device has been determined, add these numbers to find the total rated wattage needed. If this number exceeds the rated wattage (3400W) of the generator, DO NOT connect all these devices.
USING YOUR GENERATOR SOME NOTES ABOUT POWER CORDS Long or thin cords can drain the power provided to an electrical device by the generator. When using such cords, allow for a slightly higher rated wattage requirement by the electrical device. Device Requirements Max.
Fig. 14 PARALLEL CONNECT The parallel connection ports (Fig. 14) allow you to connect two WEN generators to increase the total available electrical power. The WEN Parallel Connection Kit can be purchased from wenproducts.com. Follow the instructions included with your parallel connection kit for proper installation and operation.
OPTION 1: AUTOMATIC FUEL SHUTOFF (RECOMMENDED) The WEN 3800W Inverter Generator is equipped with automatic fuel shutoff. This feature turns off the flow of fuel, allowing for the generator to use up the remaining fuel from the carburetor before turning off. This prolongs the lifespan of the generator by preventing build-up and blockages caused by stagnant fuel inside of a carburetor.
MAINTENANCE Proper routine maintenance of the generator will help prolong the life of the machine. Please perform maintenance checks and operations according to the schedule in Table 4. CAUTION! Never perform maintenance operations while the generator is running. Before maintaining or servicing the generator, turn OFF the generator, disconnect all devices and allow the generator to cool down.
5. Reinstall dipstick and wipe clean any spilled oil with a rag. Reinstall the oil access cover. TIP: Your WEN generator is compatible with the WEN 55201 Magnetic Oil Dipstick (not included), available for purchase at wenproducts.com. The dipstick’s industrial-strength magnetic tip will collect metal shavings from...
MAINTENANCE DRAINING THE CARBURETOR We recommend draining the carburetor after every use and before storing the generator. (If the generator is shut off using the AUTO OFF/FUEL OFF, it is only necessary to drain it before periods of long storage.) Draining the car- buretor can prevent the fuel from clogging up the carburetor;...
If the air filter element has been damaged, replace it with a new one. Replacement air filters can be ordered from wenproducts.com by searching part no. 56380i-1001B.1. 4. Reinstall the air cleaner element, air cleaner cover and service panel.
MAINTENANCE SPARK PLUG MAINTENANCE Refer to Recommended Maintenance Schedule in Table 4 for maintaining the spark plug. The spark plug is important for proper engine operation. Check the spark plug regularly to maintain proper engine operation. A good spark plug should be intact, free of deposits, and properly gapped. To inspect or replace the spark plug: Fig.
MAINTENANCE DRAINING / CHANGING OIL Change the oil according to the Recommended Maintenance Schedule in Table 4. Change the oil MORE OFTEN if operating under heavy load or high ambient temperatures. It is also necessary to drain the oil from the crankcase if it has become contaminated with water or dirt. Changing the oil when the engine is warm allows for more-complete drainage.
MAINTENANCE DRAINING THE FUEL TANK Drain and clean the fuel tank each year, or before storing the generator for longer than two months. To drain the fuel tank and carburetor: Fig. 27 1. Using a Phillips-head screwdriver, remove the service panel on the opposite side of the recoil starter by unscrewing the top two screws (Fig.
Cover 3. Disconnect negative (-) battery terminal first (black cable). 4. Disconnect positive (+) battery terminal second (red cable). 5. Replace with an identical new battery (part no. 56380i- Rubber Belt 1304). 6. Connect the positive (+) battery terminal (red cable) first.
TRANSPORTATION & STORAGE TRANSPORTING THE GENERATOR To prevent fuel spillage when transporting, be sure to perform the following: 1. Tighten the fuel cap and turn the vacuum relief valve valve to the OFF position. 2. Flip the engine switch to the OFF position. 3.
TROUBLESHOOTING GUIDE WARNING! Stop using the generator immediately if any of the following problems occur or risk serious personal injury. If you have any questions, please contact customer service at 1-800-232-1195 (M-F 8-5 CST), or email firstname.lastname@example.org. PROBLEM POSSIBLE CAUSE SOLUTION 3-in-1 switch is set to OFF.
EXPLODED VIEW & PARTS LIST Fig. 12 - Fuel Tank Assembly Part No. Description Qty. Fuel Tank 12-1 56380i-1201 Assembly 12-2 56380i-1202 Fuel Gauge 12-3 56380i-1203 Fuel Tank Outlet 12-4 56310i-1701 Bolt 12-5 56380i-1205 Flat Washer 12-6 56380i-1206 Bushing 12-7...
EXPLODED VIEW & PARTS LIST Fig. 13 - Frame Fig. Fig. Part No. Description Qty. Part No. Description Qty. 56380i- Engine Frame Carbon Tank 13-1 13-14 56380i-1314 1301B Assembly Mounting Bracket 13-2 56380i-1302 Battery Case 13-15 56380i-1315 Carbon Tank Carbon Tank...
EXPLODED VIEW & PARTS LIST Fig. 14 - Control Panel Assembly Part No. Description Qty. Part No. Description Qty. 14-1 56200-0615 Screw 14-19 56380i-1419 Multimeter Switch 14-20 56380i-1420 Reset Button 14-2 56380i-1402 Subassembly NEMA 5-20R 14-21 56380i-1421 14-3 56200-0621B Cover Plate...
56380i-1501 Handle Tube 15-9 56380i-1509 Bolt 15-10 56310i-0209 Bolt 15-2 56380i-1502 Left Rotation Arm 15-11 56310i-1807 Nylon Nut 15-3 56380i-1503 Right Rotation Arm 15-12 56380i-1512 Flat Washer Left Handle 15-4 56380i-1504 Connector Connector 15-13 56380i-1513 Fastener Right Handle 15-5 56380i-1505...
EXPLODED VIEW & PARTS LIST Fig. 16 - Side Covers Part No. Description Qty. Part No. Description Qty. 16-1 56380i-1601 Left Cover 16-11 56200-0612 Screw And Washer 16-2 56200-0406 Bolt Recoil Starter 16-12 56200-0420 Handle 16-3 56380i-1603 Left Shell 16-4...
Bolt 18-3 56380i-1803 Heat Insulator 18-4 56380i-1804 Inner Muffler Cover 18-5 56200-0406 Bolt NOTE: Replacement parts can be purchased from wenproducts.com, or by calling our customer ser- vice at (800) 232-1195, M-F 8-5 CST. Parts and accessories that wear down over the course of normal...