DUROMAX XP18HP Owner's Manual
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DUROMAX XP18HP Owner's Manual

General purpose gasoline engine
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DuroMax XP18HP / XP18HPE
General Purpose Gasoline Engine
Owner's Manual

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Summary of Contents for DUROMAX XP18HP

  • Page 1 DuroMax XP18HP / XP18HPE General Purpose Gasoline Engine Owner's Manual...
  • Page 2 Due to revisions and other changes, the information described in this manual may be slightly different than the engine received. The copyright of this manual belongs to DuroMax Power Equipment, unauthorized reproduction is prohibited. Manual is subject to change without notice.
  • Page 3 DANGER: This engine produces poisonous carbon monoxide gas when running. This gas is both odorless and colorless. Even if you do not see or smell gas, carbon monoxide may still be present. Breathing this poison can lead to headaches, dizziness, drowsiness, and eventually death. ...

  • Page 4: Table Of Contents

    CONTENTS Safety Precautions …………………………………………………………… 1 Parts Description ……………………………….……………………………. 2 Control Connection of Remote Distance (optional) …………..…….………. 3 Pre-Operate Inspection …….………………………………………………… 4 Engine oil ………………..……………...………….…………………. 4 Air cleaner …...……………..…………………………………………. 5 Fuel and fuel tank ……………………………………...….…………... 6 Starting of the Engine ………………………………….…….………..……... 8 Operation ……………………………………………………………...……...
  • Page 5 Maintenance …………………………………………………………..…….. 15 Maintenance Schedule ………………………………...……………... 15 Maintenance Procedures …………………………….……….………. 17 Transport, Storage and Removal from Storage …………...………………..23 Transport ….………………………………………..………..……….. 23 Storage ………………………………………..………………………. 23 Removal from storage……………………….……………….……….. 24 Troubleshooting……………………………………………………..……….. 25 Will not start …….……………………….……………………………. 25 Low Power ………………..…………………………………………... 27 Running Rough ……………...…………………………………….…..

  • Page 6: Safety Precautions

    SAFETY PRECAUTIONS WARNING Before operating the engine, be sure to read and become familiar with the manual, otherwise injury to personnel or damage to equipment may occur. Please pay special attention to the following: 1. Run the engine in a well-ventilated place, keep it at least one meter away from building walls or other equipment, and keep away from inflammables such as gasoline, matches and so on to avoid the possibility of fire.

  • Page 7: Parts Description

    PARTS DESCRIPTION The main parts of engine are located as follows (Fig.1):...

  • Page 8: Control Connection Of Remote Distance (Optional)

    CONTROL CONNECTION OF REMOTE DISTANCE (OPTION) The holes in levers of both the choke and throttle valve are used for mounting optioned steel wires. Illustrations show how to mount a solid steel wire and a meshed steel wire. If choosing a meshed steel wire a return spring is added.

  • Page 9: Pre-Operate Inspection

    Pre-Operation Inspection Engine Oil Caution ● Engine oil is a key factor in deciding the engine's performance. Do not apply engine oil with additives or 2-stroke gasoline oil, as they haven't enough lubrication, which may shorten the engine's service life. ●...

  • Page 10: Air Cleaner

    AIR CLEANER Dismantle the air cleaner housing and check its filter element, make sure it is Air cleaner clean and intact, if not or replace it. housing CAUTION Filter Never run the engine without an air Element cleaner, or severe wear of the engine may occur.

  • Page 11: Fuel And Fuel Tank

    CAUTION  Handle fuel with care, it can damage plastic and painted surfaces.  It is normal to hear an occasional light spark knock or pinging with the engine running under heavy load.  Should spark knock or pinging be heard at a steady speed under normal load, change the brand of gasoline;...
  • Page 12 WARNING  Gasoline is extremely flammable and is explosive under certain conditions. Refueling in a well ventilated area with the engine stopped. Do not smoke and allow flames or sparks in the area where gasoline is stored or where the fuel tank is refueled. ...

  • Page 13: Starting Of The Engine

    STARTING OF THE ENGINE 1. Push the fuel cock to “ON.” 2. Push the choke lever to “CLOSE.” NOTE If the engine is hot, closing the choke is unnecessary.
  • Page 14 3. Move left the throttle lever a little. 4. Start the engine (Fig. 16). a) Push the engine switch to “On” b) Pull slightly the starting rope handle up until feeling anti-action, and then make a rapid pull. CAUTION Releasing the handle suddenly may make it hitting the engine. Release the handle slowly conforming to its recoiling force.

  • Page 15: Operation

    OPERATION 1. Preheat the engine and push back the choke lever to “OPEN” 2. Set the throttle lever in proper position to ensure the engine runs at required velocity...
  • Page 16 Engine Oil Alarm The engine oil alarm is designed to alarm the user the fact that the engine oil in the crankcase is insufficient. Running with insufficient engine oil may damage the engine. When the oil level in the crankcase is too low, the engine oil alarm will stall the engine automatically while the engine switch is still at “ON”.

  • Page 17: Stop

    STOP In an emergency, push the engine switch to “OFF” to stall the engine. During normal operation, stop the engine in the following sequence: Throttle Valve Lever 1. Push the throttle valve lever to the right. 2. Push the engine switch to “OFF” 3.

  • Page 18: Exhaust Control System

    Exhaust control is very important, carbon monoxide is toxic. DuroMax Power Equipment decreases exhaust emissions by using lean carburetors and other devices in the engine design.

  • Page 19: Modifying

    III. MODIFICATION Modifying the exhaust control system may cause exhaust emissions to exceed statutory limit values. Illegal modifications are as follows: 1. Dismantling or modifying any part of air inlet or outlet system. 2. Modify or remove speed-adjusting connection device or speed adjustment device to result in the engine running outside the set parameters.

  • Page 20: Maintenance

    MAINTENANCE MAINTENANCE SCHEDULE To keep the engine in a sound condition, the user should maintain it according to the table below: Every Use and/or 3 months and/or 6 months and/or Yearly and/or 20 hrs. 50 hrs. 100 hrs. 300 hrs. Oil level check √...
  • Page 21 CAUTION We recommend that you use DuroMax Power Equipment OEM parts. Using aftermarket parts may damage the engine and will void the Manufacturer’s Warranty. NOTES *：Only for inside-ventilating double-core carburetors. **：Only for paper core air cleaners. ① More often than that in the schedule if in dusty circumstances.

  • Page 22: Maintenance Procedures

    WARNING Stop the engine before servicing. If service is required with the engine running, be sure to keep good ventilation in the area. The exhaust emissions from the engine contain toxic carbon monoxide, inhaling this toxic gas may do harm to personnel and even result in death. MAINTENANCE PROCEDURES 1.
  • Page 23 2. Air Cleaner Maintenance A dirty air cleaner may block proper airflow into the carburetor. Service the air cleaner regularly to keep the engine running in peak condition. If operating the engine in an extremely dusty area, the air cleaner should be serviced more often. WARNING CAUTION Never clean the air cleaner in gasoline or low...
  • Page 24 3. Cleaning the Fuel Cup Set the fuel valve to “OFF”, remove the fuel cup and O-ring. Wash them in non-flammable or high flash- O-Ring point cleansing solvents, dry them, and reinstall. Set the fuel switch to “ON” and check for leaks. WARNING ●...
  • Page 25 4. Spark Plug Spark plug type: BP6ES, BPR6ES (NGK) or NHSPLD F6RTCU Proper spark plug clearance will avoid spark plug deposits and wear. WARNING a) Remove the spark plug using the included Be careful not to touch the muffler spark plug wrench. during or just after running the engine.
  • Page 26 5. Spark Arrestor WARNING The spark arrestor should be serviced at least once Be careful not to touch the muffler every 100 hours of operation. during or just after running the engine. a) Unscrew two nuts M4, and remove the exhaust elbow from the engine body.
  • Page 27 6. Carburetor Idle Adjustment a) Start and warm up the engine to a normal running temperature. b) Set the idle speed by adjusting the throttle adjustment screw on the carburetor until the engine runs smoothly at the lowest speed possible. Throttle Adjustment Screw Standard idle: 1700 ±...

  • Page 28: Transport, Storage And Removal From Storage

    TRANSPORT, STORAGE, AND REMOVAL FROM STORAGE TRANSPORT CAUTION Transport with the fuel valve turned off. Always let To avoid fuel spins do not lean the engine cool completely before transporting. the engine when filling. Spilled STORAGE fuel or fuel vapor may ignite If the engine is stored for an extended period, be and cause fire.

  • Page 29: Removal From Storage

    III. REMOVAL FROM STORAGE After storage perform maintenance according to the following: Storage time Service item Under 1 Month No additional maintenance is required 1 - 2 Months Completely drain and replace gasoline. Completely drain and replace gasoline. 2 Months – 1 Year Clean carburetor and fuel lines thoroughly.

  • Page 30: Troubleshooting

    Troubleshooting Guide Will not start - Troubleshooting ISSUE PROBLEM SOLUTION There is not enough fuel in the fuel 1. Fuel Low Fill fuel tank, open fuel valve. tank or fuel valve is closed. Air vent valve in the fuel tank is Clear the air vent valve.
  • Page 31 ISSUE PROBLEM SOLUTION Carbon and/or dirt around electrodes. Clean Spark Plug. 4. Fouled Spark Plug ▲ Good Compression Electrode is burned, damaged Replace spark plug. ▲ Good Fuel Supply seriously, or insulators damaged. ▲ Good Ignition Coil lmproper spark plug gap. Adjust to proper value.

  • Page 32: Low Power

    Low Power - Troubleshooting ISSUE PROBLEM SOLUTION Readjust ignition advance lgnition system lncorrect ignition timing angle Bleed air from and clean Air in fuel line or fuel line the fuel clogged. line. Main jet is not adjusted Readjust the main jet. properly.

  • Page 33: Running Rough

    ISSUE PROBLEM SOLUTION Piston, cylinder, or piston Replace worn parts. rings are worn. Throttle speed Check cylinder head for Air leaking from below increase responds warping, replace gasket, and the cylinder head. slowly, speed Low Compression torque to listed specifications. drops, or engine Valve clearance is Adjust the valve clearance.

  • Page 34: Engine Stalls

    ISSUE PROBLEM SOLUTION Troubleshoot heat issue (See Engine is overheating. Troubleshooting Section V). Abnormal combustion Cylinder has carbon buildup. Clean carbon from the cylinder. Select a proper fuel within Wrong fuel type. requirements. There is water in float bowl. Clean float bowl. lmproper spark plug gap.
  • Page 35 ISSUE PROBLEM SOLUTION Spark plug is damaged or Replace the spark plug. dirty. Replace the spark plug and Spark plug electrode is remove any debris from the damaged. engine. Spark plug cap is loose or Inspect and replace or connect Ignition damaged.

  • Page 36: Running Hot

    Running Hot - Troubleshooting TROUBLE CAUSE REMEDY lncorrect ignition timing Readjust ignition advance angle Add engine oil to the upper level Engine oil is low. mark. Exhaust pipe is clogged Clean the exhaust pipe. Exhaust leak at muffler or cylinder head. Repair exhaust leak.

  • Page 37: Excess Or Abnormal Noise

    Excess or Abnormal Noise TROUBLE CAUSE REMEDY Piston, cylinder, or piston rings are worn. Replace worn parts. Piston pin and/or piston pin channel are Replace piston and/or piston Piston slap or banging sound worn. is heard. Connecting rod is worn. Replace connecting rod.

  • Page 38: Specifications

    SPECIFICATIONS DuroMax XP18HP XP18HPE Engine Inclined overhead (OHV 25°), Single Cylinder, Forced Air Cooled, 4-Stroke Gasoline Engine 192F 440 cc Engine Type Displacement 9.0 kW (18.0 HP) @ 3600 8.5 : 1 Rated Power (KW/rpm) Compress ratio 19.55 ft. lb. @...

  • Page 39: Timing Of Distribution

    Adjustment Specifications Engine Specifications Part Specification Item Specification Carburetor idling 1700 ± 150 rpm Model 192F Valve clearance Intake: .006 in ± .001 in. Ignition system Non-transistorized ignition (cold) (0.15mm ± 0.02mm) (TCI) Exhaust: .008 in ± .001 in. (0.20mm ± 0.02mm) Spark plug type BPR6ES (NGK) Shaft Rotation...

  • Page 40: Electric Diagram

    ELECTRIC DIAGRAM...
  • Page 41 1-year limited parts warranty. If, under the course of normal, non-commercial use, the DuroMax item fails within 1 year from the date of purchase, as a result of faulty materials or workmanship, DuroMax will provide necessary replacement or repair parts at no charge for the parts.
  • Page 42 DuroMax Power Equipment 5800 Ontario Mills Parkway Ontario CA 91764 Phone Support: 844-DUROMAX M-F 7 am – 5 pm PST Email Support: support@duromaxpower.com...

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