MODEL GN400iX 4000-WATT INVERTER GENERATOR Instruction Manual EPA III & CARB CERTIFIED NEED HELP? CONTACT US! Have product questions? Need technical support? Please feel free to contact us: 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.
CONTENTS WELCOME 3 Specifications.................................................................................................... 3 Introduction...................................................................................................... 4 SAFETY 5 Safety Information............................................................................................ 5 Generator Safety Warnings...............................................................................
SPECIFICATIONS CONTENTS GENERATOR Model Number GN400iX Surge (Starting) Wattage 4000 Watts Rated (Running) Wattage 3500 Watts Rated Voltage 120V AC Rated Amperage 29.2A Phase Single Frequency 60Hz Product Weight 66.1 lbs Product Dimensions 19.8 in. × 13.8 in. × 18.9 in. ENGINE Engine Type 4 stroke, OHV, single cylinder with forced air cooling system Engine Displacement 212cc Fuel Tank Capacity 1.85 US gallons (7 L), 87 octane minimum Oil Capacity 17.0 fl. oz. (0.
INTRODUCTION Thanks for purchasing the WEN 4000-Watt Portable Generator. Refer to the illustration below for the locations of the serial number on the side of the engine or on the serial number label. Record the generator information in the spaces provided below. If assistance for information or service is required, please contact customer service by calling 1-800-232-1195, M-F 8-5 CST; you will be asked to provide the following generator information when calling.
SAFETY INFORMATION WARNING: Before operating the generator, make sure to read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire or serious injury. SAFETY INTRODUCTION Safety is a combination of common sense, staying alert, and knowing how your tool works. This manual contains important information regarding the generator’s potential safety concerns, as well as preparation, operation, and maintenance instructions.
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. NEVER use a generator inside homes, garages, crawl spaces, or other partially enclosed areas. Deadly levels of carbon monoxide can build up in these areas.
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 1. Using a generator indoors can kill you in minutes. Only use a generator outside and far away from windows, doors and vents. 2. Do not smoke near the generator. 3.
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. Start the generator according to the instructions and plug a small load in to make sure the outlet is producing electricity.
UNPACKING & PACKING LIST PACKING LIST Components Spark Plug Wrench Wrench (1) Handle (1) Tools Generator (1) Wrench 8mm/10mm (1) Funnel (1) High Altitude Kits Main Jet (1) Bolt Seal (1) Fuel Cup Seal (1) 3000 - 6000 ft High Altitude Kit (1) REMOVING THE SHIPPING BRACKETS Your generator comes with two shipping brackets that protect the generator during delivery. These brackets should be removed before using the generator.
ASSEMBLY & ADJUSTMENTS HIGH ALTITUDE OPERATION ABOVE 3000 FEET The fuel system on this generator may be affected by operation at high altitudes. Proper operation can be ensured by installing an altitude kit at altitudes higher than 3000 feet above sea level. At elevations above 8000 feet, the engine may experience a decrease in performance, even with the proper altitude kit.
KNOW YOUR GENERATOR KNOW YOUR GENERATOR Refer to the following 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. GENERATOR Fuel Gauge Muffler Fuel Cap Fuel Valve Oil Fill & Dipstick Air Filter Recoil Starter Oil Drain Plug Control Panel • FUEL GAUGE Indicates amount of fuel inside the fuel tank. E indicates empty, F indicates full.
KNOW YOUR GENERATOR CONTROL PANEL 5 6 7 4 8 3 2 9 10 11 1 12 1. AC 120V NEMA TT-30R RV Receptacle Standard RV connector. 2. Engine Switch This switch makes the engine run or stop. 3. Eco-Mode Switch Flip this switch to ON to increase fuel economy and runtime when the load is below 2400W (75% load). 4.
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 1-800-232-1195 (M-F 8-5 CST) for customer service. Failure to perform these steps properly can damage the generator or shorten its life. STEP 1 - ADD/CHECK OIL The generator is shipped without oil. User must add the proper amount of oil before operating the generator for the first time.
GENERATOR PREPARATION TO CHECK OIL LEVEL (before every subsequent start): Fig. 6 1. Place the generator on a level surface. Make sure the engine is OFF before adding or checking oil. 2. Remove and wipe the dipstick with a clean rag. Upper Limit 3. Insert the dipstick into the oil fill without screwing it in. Remove the dipstick to check the oil mark. 4.
GENERATOR PREPARATION TO ADD GASOLINE: 1. Place the generator on a level surface. Make sure the engine is OFF before adding or checking the fuel. Fuel Gauge Fig. 7 2. Unscrew the fuel cap (Fig. 7) and set it aside. The fuel cap may be tight and hard to unscrew. 3. Slowly add unleaded gasoline to the fuel tank. Be careful not to overfill. Reinstall fuel cap and wipe clean any spilled gasoline with a dry cloth. NOTE: Do not fill the fuel tank to the very top.
STARTING YOUR GENERATOR Before starting the generator, make sure you have read and performed the steps in the “Generator Preparation” section of this manual, pages 14-16. 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. 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.
STARTING YOUR GENERATOR BEFORE STARTING THE GENERATOR 1. Verify that the generator is outside on a dry, level surface. Allow at least two feet of clearance on all sides of the generator. 2. To maximize safety, check that the generator is properly grounded. Refer to "Step 3 - Ground The Generator" on page 15. 3. Check that there is a sufficient level of oil in the crankcase. Add oil if necessary. Refer to "Step 1 - Add/Check Oil" on page 13. 4.
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 running 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. However, 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 1. Before connecting electrical devices, allow the generator to run for a few minutes to stabilize the speed and voltage output. 2. Select the device with the highest wattage, and make sure it is turned off. Plug the device into the matching generator outlet and then turn the device on. Allow the engine to stabilize. 3. Repeat step 2 to plug in each additional device. Do not attempt to plug in or start multiple devices at the same time.
USING YOUR GENERATOR LIGHT GREEN (POWER INDICATOR) MEANING RED (OVERLOAD) RESOLUTION ON OFF Generator output is normal. No action needed. ON Flashing continuously Generator is exceeding rated output. Reduce load on generator. OFF Flashes 1x, repeating every 3 sec Voltage at alternator is too low. No electrical output. Check for loose connections. Call 1-800-232-1195 for assistance. OFF Flashes 2x, repeating every 3 sec Engine speed is too low. No electrical output.
USING YOUR GENERATOR CO SENSOR INFORMATION The CO Watchdog carbon monoxide monitoring system (Fig. 11 - 1) measures the accumulation of poisonous CO gas while the generator is running. If the level of CO gas gets too high, the CO Watchdog system will automatically shut down the generator. This system is not a substitute for an indoor CO alarm. Whenever the CO Watchdog system shuts down the generator, the LED on the generator control panel (Fig.
SHUTTING OFF YOUR GENERATOR CAUTION! Unplugging running devices can cause damage to the generator. Never stop the engine with electrical devices connected and running. WARNING! Allow the generator to cool down before touching areas that become hot during use. CAUTION! Allowing gasoline to sit in the fuel tank for long periods of time can make it difficult to start the generator in the future. Never store the generator for extended periods of time (over 2 months) with fuel in the fuel tank.
MAINTENANCE RECOMMENDED MAINTENANCE SCHEDULE Proper routine maintenance of the generator will help prolong the life of the machine. Please perform maintenance checks and operations according to the maintenance schedule below, Table 4. If there are any questions about the maintenance procedures listed in this manual, please contact customer service at 1-800-232-1195 (M-F 8-5 CST), or email techsupport@wenproducts.com. WARNING! Never perform maintenance operations while the generator is running.
MAINTENANCE CLEANING YOUR GENERATOR Keep the generator clean to prevent improper operation or machine damage from dirt and debris. Inspect all ventilation openings on the generator. These openings must be kept clean and unobstructed. If the generator becomes dirty, use a damp cloth to wipe exterior surfaces. Use a soft bristle brush to loosen dirt and oil and use a vacuum to pick up loose dirt. Use low pressure air (not to exceed 25 PSI) to blow away dirt.
MAINTENANCE DRAINING THE CARBURETOR Fig. 14 Drain the carburetor after every use and before storing the generator (refer to page 24, Table 4). Draining the carburetor can help prevent build-up and blockages caused by stagnant fuel inside of the carburetor. 1. Prepare an approved gasoline-storage container under the carburetor to collect the drained fuel. 2. The carburetor can be accessed from the backside of the generator between the engine and the air filter.
MAINTENANCE INSPECTING/CLEANING THE SPARK ARRESTOR Inspect and clean the spark arrestor every 100 hours of operation (refer to page 24, Table 4). The spark arrestor is located outside the muffler, which gets very hot during operation. Allow the engine to cool completely before servicing the spark arrestor. Fig. 16 Spark Arrestor Assembly 1. Remove the Phillips-head screw that secures the spark arrestor to the muffler. See Fig. 16. 2. Remove the spark arrestor screen. 3.
MAINTENANCE 5. Measure the plug gap with a spark plug gap gauge. The gap should be 0.7 to 0.8 mm (0.028-0.031 in). Carefully adjust the gap if necessary. See Fig. 17. Fig. 17 0.7 - 0.8mm 6. Screw the spark plug back into the spark plug hole using the spark plug wrench. Do not over-tighten spark plug. Recommended tightening of the spark plug is ½ to ¾ of a turn (15 ft-lb torque/20.33 Nm) after the spark plug gasket contacts the spark plug hole. 7. Reinstall the spark plug boot over the spark plug.
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 fuel valve to the OFF position. 2. Flip the engine switch to the STOP position. 3. Drain the fuel tank if possible. Refer to "Draining The Fuel Tank" on page 28. 4. Keep the generator upright. Never place the generator on its side or upside down - doing so could damage the internal components of the generator and make it difficult to start.
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 techsupport@wenproducts.com. PROBLEM Engine will not start. Engine runs but there is no electrical output. 30 POSSIBLE CAUSE SOLUTION 1. Engine switch is set to STOP. 1. Set engine switch to RUN. 2. Fuel valve is turned to OFF. 2. Turn fuel valve to ON. 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 techsupport@wenproducts.com. PROBLEM POSSIBLE CAUSE 1. Generator is overloaded. Generator runs but does not support all electrical 2. Short circuit in one of the devices connected. devices. 1. Turn off and unplug all electrical devices.
WIRING DIAGRAM Magnet CO Power Winding Direct Current Winding Ignition Coil Stepper Motor Ignition Coil Fuse CO Sensor Inverter Spark Plug Flywheel Trigger CO Sensor LED Controller Fuse Oil Sensor Ignitor Reset Eco-Mode Switch Engine Switch USB Control Panel Unit 32
EXPLODED VIEW & PARTS LIST NOTE: Replacement parts can be purchased from wenproducts.com, or by calling our customer service at (800) 232-1195, M-F 8-5 CST. Parts and accessories that wear down over the course of normal use are not covered by the two-year warranty. ASSEMBLY 1 - CRANKCASE ASSEMBLY 2 - CRANKCASE COVER No. Part No. Description Qty.
EXPLODED VIEW & PARTS LIST ASSEMBLY 3 - CYLINDER HEAD 34 ASSEMBLY 4 - CRANKSHAFT No. Part No. Description Qty.
EXPLODED VIEW & PARTS LIST ASSEMBLY 6 - VALVE & CAMSHAFT ASSEMBLY 7 - RECOIL STARTER No. Part No. Description Qty. No. Part No. Description Qty.
EXPLODED VIEW & PARTS LIST ASSEMBLY 9 - FLYWHEEL ASSEMBLY 11 - MUFFLER No. Part No. Description Qty. 9-1 56310i-1101 Flywheel Nut 1 9-2 56200-0706 Bolt 3 9-3 GN400i-0903 Starter Pulley 1 No. Part No. Description Qty.
EXPLODED VIEW & PARTS LIST ASSEMBLY 12 - FUEL TANK ASSEMBLY 13 - FRAME No. Part No. Description Qty. 13-1 GN400iX-1301 Engine Frame Assembly 1 13-2 GN400i-1302 Engine Frame Shock Absorber Seat 4 13-3 GN400i-1303 Hex Flange Nut 4 No. Part No. Description Qty.
EXPLODED VIEW & PARTS LIST ASSEMBLY 14 - CONTROL PANEL 38 No. Part No. Description Qty.
WARRANTY STATEMENT WEN Products is committed to building tools that are dependable for years. Our warranties are consistent with this commitment and our dedication to quality. LIMITED WARRANTY OF WEN PRODUCTS FOR HOME USE GREAT LAKES TECHNOLOGIES, LLC (“Seller”) warrants to the original purchaser only, that all WEN consumer power tools will be free from defects in material or workmanship during personal use for a period of two (2) years from date of purchase or 500 hours of use; whichever comes first.
THANKS FOR REMEMBERING V. 2021.07.
