73cc Vertical Engine Item # 56173 Owner’s Manual Manual del Propietario Questions? Problems? Please call our customer help line: (800) 232-1195 M-F 8-5 CST FEATURES • • • • Low Oil Automatic Shutoff Circuit Breaker for Overload Protection 0.3 Gallon Fuel Tank Capacity Meets EPA Phase III Emission Standards and CARB Emission Standards 2012 www.wenproducts.
ENGINE IDENTIFICATION For information and questions, please contact the Customer Service Help Line by calling 800-2321195. Certain information will be requested by the Customer Service Representative and to facilitate that, please fill in the information below. Refer to the illustration below for the location of Serial Number. Record engine information in the spaces provided below.
TABLE OF CONTENTS ENGINE IDENTIFICATION ..........................................................................................................i SERVICE RECORD .........................................................................................................................i INTRODUCTION ............................................................................................................................ 1 SAFETY INFORMATION....................................................................
INTRODUCTION Thank You for Purchasing a WEN Power TM Product. . This manual provides information regarding the safe operation and maintenance of this product. Every effort has been made to ensure the accuracy of the information in this manual. WEN Power TM reserves the right to change this product and specifications at any time without prior notice. Please keep this manual available to all users during the entire life of the product.
SAFETY INFORMATION Before operating this engine read and observe all warnings, cautions, and instructions on this sheet, on the engine, and in the Owner’s Manual. NOTE: The following safety information is not meant to cover all possible conditions and situations that may occur. Read the entire Owner’s Manual for safety and operating instructions. Failure to follow instructions and safety information could result in serious injury or death.
GENERAL SAFETY PROCEDURES For any questions regarding the hazard and safety notices listed in this manual or on the product, please call (800) 232-1195 M-F 8-5 CST before using the engine. DANGER: CARBON MONOXIDE. Using an engine indoors CAN KILL YOU IN MINUTES. Engine exhaust contains carbon monoxide (CO). This is a poison gas you cannot see or smell. If you can smell the engine exhaust, you are breathing CO. But even if you cannot smell the exhaust, you could be breathing CO.
WARNING: This engine produces heat when running. Temperatures near exhaust can exceed 150º F (65º C). • • Do not touch hot surfaces. Pay attention to warning labels on the engine identifying hot parts of the machine. Allow engine to cool down after use before touching engine or areas of the engine that become hot during use. CAUTION: Misuse of this engine can damage it or shorten its life. • • • Use engine only for its intended purposes. Operate only on dry, level surfaces.
ENGINE COMPONENTS Please familiarize yourself with the locations and functions of the various components and controls of your engine.
SET UP Warning: TO PREVENT SERIOUS INJURY: Operate only with proper spark arrestor installed. Operation of this equipment may create sparks that can start fires around dry vegetation. A spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements.
ENGINE PREPARATION Using the Engine for the First Time The following section describes steps necessary to prepare the engine for use. If after reading this section, 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 engine or shorten its life. Step 1 - Fill Oil The engine is shipped without oil. User must add the proper amount of oil before operating the engine for the first time.
Step 2- Add Gasoline WARNING: This engine 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. • • • • • • • • Do not operate near open flame. Do not smoke near engine. Always operate on a firm, level surface. Always turn engine off before refueling. Allow engine to cool for at least 2 minutes before removing fuel cap.
STARTING THE ENGINE Before starting the engine, make sure you have read and performed the steps in the “Engine Preparation” section of this manual. If you are unsure about how to perform any of the steps in this manual please call (800) 232-1195 M-F 8-5 CST for customer service. DANGER: CARBON MONOXIDE. Using an engine indoors CAN KILL YOU IN MINUTES. Engine exhaust contains carbon monoxide (CO). This is a poison gas you cannot see or smell. If you can smell the engine exhaust, you are breathing CO.
4. Grip the Starter Handle of the Engine loosely and pull it gently until resistance is felt. Allow Cable to retract fully and then pull it quickly. Repeat until the engine starts. Note: Do not let the Starter Handle snap back against the engine. Hold it as it recoils so it doesn't hit the engine. 5. Allow the Engine to run for several seconds. Then, if the Mower’s choke control is in the CHOKE (START/CLOSED) position, move the choke control very slowly to its RUN (OPEN) position.
Step 2 – Check the Fuel Level Before starting the engine, check to see that there is sufficient gasoline in the fuel tank. The fuel gauge on top of the engine will indicate the fuel level in the tank. Add gasoline if necessary but leave sufficient room in tank for expansion. WARNING: This engine 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 fuel.
MAINTENANCE / CARE Proper routine maintenance of your engine will help prolong the life of your machine. Please perform maintenance checks and operations according the schedule below. If you have questions about any of the maintenance procedures listed in this manual, please call (800) 232-1195 M-F 8-5 CST. CAUTION: Never perform maintenance operations while the engine is running.
3. If oil level is below the second thread from the lip of the oil fill opening, slowly add oil until the engine crankcase is filled. 4. Reinstall and tighten oil filler cap before starting the engine. Changing/ Adding Oil Change the oil according to the maintenance schedule. Change the oil when the engine is warm. This will allow for complete drainage. Change oil more often if operating under heavy load or high ambient temperatures.
0.7-0.8 mm (0.028-0.031 in) Measuring the spark plug gap Recommended Spark Plug: NGK- BP7ES, Torch- F6TC Draining the Fuel Tank Clean fuel tank each year or before storing the engine for extended periods of time. To drain the fuel tank and carburetor: 1. Turn the fuel valve to the “OFF” position. Move the engine in a well-ventilated area away from ignition sources. 2. Place a funnel leading to a proper gasoline container below the carburetor. 3.
STORAGE / TRANSPORT PROCEDURES CAUTION: Never place any type of storage cover on the engine while it is still hot. If the engine is being stored for short periods of time (30 – 60 days), add stabilized fuel to the fuel tank until full. NOTE: Filling the tank reduces the amount of air in the tank and helps reduce deterioration of fuel. Run the engine for 2 – 3 minutes allowing stabilized fuel mixture to circulate through the carburetor.
SPECIFICATIONS Displacement Max. Output Max. Torque Engine Type Cooling System Fuel Type Capacity Type SAE Engine Oil Capacity Lubrication System Run Time @ 50% Load with full tank Sound Level at 22 feet Bore x Stroke Compression Ratio Rotation viewed from PTO (power takeoff - the output shaft) Shaft Keyway Shaft End Tapped Type Spark Plug Gap Intake Valve Clearance Exhaust Idle Speed Dimensions Weight 173cc 3.
MOUNTING HOLE DIAGRAM 17
TROUBLESHOOTING IMPORTANT: If trouble persists please call our customer help line at (800) 232-1195 M-F 8-5 Central Time. Problem Engine will not start Cause Fuel Related: No fuel in tank or fuel valve closed. Choke not in CHOKE position, cold engine. Solution Fuel Related: Fill fuel tank and open fuel valve. Move Choke to CHOKE position. Gasoline with more than 10% ethanol used. (E15, E20, E85, etc.) Clean out ethanol rich gasoline from fuel system. Replace components damaged by ethanol.
Problem Engine will not start Cause COMPRESSION RELATED: Cylinder not lubricated. Problem after long storage periods. Solution COMPRESSION RELATED: Pour tablespoon of oil into spark plug hole. Crank engine a few times and try to start again. Loose or broken spark plug. (Hissing noise will occur when trying to start.) Tighten spark plug. If that does not work, replace spark plug. If problem persists, may have head gasket problem. Loose cylinder head or damaged head gasket.
Problem Engine stops when under heavy load Cause Dirty air filter Engine running cold. Solution Clean or replace element. Allow engine to warm up prior to operating equipment. Engine knocks Old or low quality gasoline. Fill fuel tank with fresh 87+ octane unleaded gasoline. Engine overloaded. Do not exceed equipment’s load rating. Incorrect spark timing, deposit buildup, worn engine, or other mechanical problems. Have qualified technician diagnose and service engine.
EXPLODED VIEW AND PARTS LIST 21
Part # 1 Stock # 56173-001 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 56173-002 56173-003 56173-004 56173-005 56173-006 56173-007 56173-008 56173-009 56173-010 56173-011 56173-012 56173-013 56173-014 56173-015 56173-016 56173-017 56173-018 56173-019 56173-020 56173-021 56173-022 Description CYLINDER HEAD COVER CYLINDER HEAD COVER GASKET CYLINDER HEAD CYLINDER HEAD GASKET BOLT SPARK PLUG CYLINDER HEAD BOLT MUFFLER BRACKET BOLT STUD PIN CRANKCASE ASSEMBLY CRANKCASE SIDE SHIELD OIL DIPSTICK BOL
Part # 101 102 103 104 105 106 107 108 109 110 111 112 Stock # 56173-101 56173-102 56173-103 56173-104 56173-105 56173-106 56173-107 56173-108 56173-109 56173-110 56173-111 56173-112 Description FLYWHEEL BOLT IGNITION COIL GOVERNEOR ROD THROTTLE VALVE RETURNING SPRING THROTTLE CONTROL BOLT GOVEROR SUPPORT GOVERNOR SUPPORT BOLT NUT GOVERNOR SPRING CLIP 23
NOTES: 24
WARRANTY STATEMENT FOR WEN®ENGINES WEN®engines are warranted (to the original purchaser) to be free from defects in materials and workmanship for a period of two (2) years from the date of original purchase. Engines used for commercial or for rental have a warranty period of 90 days from date of original purchase. Please fill out and mail the enclosed warranty card and mail it to Power Pro Technology along with a copy of the receipt. The information is required to process warranty claims.
