Unlock the full potential of your VEVOR Gasoline Engine Water Pump with our comprehensive product manual download. Whether you are setting up your 3-inch, 7HP 265 GPM pump for the first time, optimizing its performance, or troubleshooting any issues, our detailed manual is your go-to resource. With clear, step-by-step instructions and helpful illustrations, this manual ensures a smooth and efficient setup process.
Learn how to maximize the 142ft lift and 22ft suction capabilities of your 4-stroke, gas-powered trash water transfer pump. The manual also includes maintenance tips to maintain your EPA-certified pump. Perfect for irrigation, pool maintenance, and more, this manual is designed to make your experience with the VEVOR Gasoline Engine Water Pump as seamless as possible.
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WATER PUMP MANUAL
Model:SCWP80-II/SCWP50
PUMP SAFETY
Your safety and the safety of others are critical. And using this water pump safely is an important responsibility. To help you make informed decisions about safety, we have provided operating procedures and other information on labels and in this manual. This information alerts you to potential hazards that could hurt you or others.
Of course, it is impractical or impossible to warn you about all the hazards associated with operating or maintaining a water pump. You must use your good judgment.
This entire book contains important safety information–please read it carefully.
Always make a pre-operation inspection before starting the engine. This may prevent an accident or equipment damage. Most accidents can be prevented if you follow all instructions in this manual and on the pump. The most common hazards and the best way to protect yourself and others are discussed below.
Operator Responsibility
The operator provides the necessary safeguards to protect people and property. Know how to stop the pump quickly in case of an emergency. If you leave the pump, always turn the engine off. Understand the use of all controls and connections. Be sure that anyone who operates the pump receives proper instructions. Do not let children operate the pump. Keep children and pets away from the area of operation.
Pump Operation
Pump only water that is not intended for human consumption. Pumping flammable liquids, such as gasoline or fuel oils, can result in a fire or explosion, causing serious injury. Pumping seawater, beverages, acids, chemical solutions, or any other liquid that promotes corrosion can damage the pump.
Refuel With Care
Gasoline is highly flammable, and gasoline vapor can explode. Refuel outdoors, in a well-ventilated area, with the engine stopped and the pump on a level surface. Do not fill the fuel tank above the fuel strainer shoulder. Never smoke near gasoline, and keep other flames and sparks away.
Always store gasoline in an approved container. Wipe up any spilled fuel before starting the engine. After refueling, ensure that the tank cap is closed properly and securely.
Hot Exhaust
After stopping the engine, the muffler becomes very hot during operation and remains hot for a while. Be careful not to touch the muffler while it is hot. Let the engine cool before transporting the pump or storing it indoors.
Keep the pump at least 3 feet(1 meter) away from building walls and other equipment during operation to prevent fire hazards. Do not place flammable objects close to the engine.
Carbon Monoxide Hazard
Exhaust gas contains poisonous carbon monoxide. Avoid inhaling exhaust gas. Never run the engine in a closed garage or confined area.
COMPONENTS & CONTROL LOCATIONS
CONTROLS
Read and understand this manual. Know what the controls do and how to operate them. Familiarize yourself with the pump and its operation before you begin pumping. Know what to do in case of emergencies.
Fuel Valve Lever
The fuel valve opens and closes the passage between the fuel tank and the carburetor. The fuel valve lever must be ON for the engine to run. When the engine is not in use, leave the fuel valve lever in the OFF position to prevent carburetor flooding and reduce the possibility of fuel leakage.
Ignition Switch
The ignition switch controls the ignition system. It must be in the ON position for the engine to run, and turning it to the OFF position stops it.
Choke Lever
The choke lever opens and closes the choke valve in the carburetor. The CLOSED position enriches the fuel mixture for starting a cold engine. The OPEN position provides the correct fuel mixture for operation after starting and for restarting a warm engine.
Throttle Lever
The throttle lever controls engine speed. Moving the throttle lever in the directions shown makes the engine run faster or slower. Adjusting the throttle lever also controls the pump output. At the maximum throttle position, the pump delivers the highest output volume. Moving the throttle lever toward the idle position decreases the pump’s output volume.
Recoil Starter Grip
Pulling the recoil starter grip operates the recoil starter to crank the engine.
CHECK BEFORE OPERATION
Be sure of what you are pumping. This pump is designed to pump fresh water not intended for human consumption.
It is essential to check the pump’s condition a few moments before operating it for your safety and to maximize the service life of your equipment. If there is a problem, be sure to take care of it or have your servicing dealer correct it before you operate the pump.
Improperly maintaining this pump or failing to correct a problem before operation could cause a malfunction that could seriously injure you. Always perform a pre-operation inspection before each operation and fix any issues.
Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of exhaust gas. Never run the engine in a closed garage or confined area.
Keep the pump at least 3 feet(1 meter) away from building walls and other equipment during operation to prevent fire hazards. Do not place flammable objects close to the engine. Before beginning your pre-operation checks, be sure the pump is on a level surface and the ignition switch is OFF.
Check the General Condition of the Pump
Look around and underneath the pump for signs of oil or gasoline leaks. Remove any excessive dirt or debris, especially around the engine muffler and recoil starter. Look for signs of damage.
Check that all nuts, bolts, screws, hose connectors, and clamps are tightened.
Check the Suction and Discharge Hoses
Check the general condition of the hoses. Be sure the hoses are in serviceable condition before connecting them to the pump. Remember that the suction hose must be reinforced to prevent hose collapse.
Ensure the sealing washer in the suction hose connector is in good condition (see page 14).
Ensure the hose connectors and clamps are securely installed. Also, check that the strainer is in good condition and installed on the suction hose (see page 14).
INSPECT ENGINE OIL LEVEL
Check the engine oil level with the engine stopped and in a level position
- Remove the oil filler cap/dipstick and wipe it clean.
- Insert and remove the dipstick without screwing it into the filler neck. Check the oil level shown on the dipstick.
- If the oil level is low, fill the edge of the oil filler hole with the recommended oil.
- Screw in the oil filler cap/dipstick securely.
Warning: Running the engine with a low oil level can cause damage.
AIR FILTER INSPECTION
A dirty air filter will restrict airflow to the carburetor, reducing engine and pump performance.
Remove the air cleaner cover and inspect the filter. Clean or replace dirty filter elements. Always replace damaged filter elements. Check the oil level if the air cleaner has an oil bath.
Reinstall the air filter and air cleaner cover. Be sure all the parts shown below are in place. Tighten the wing nut securely.
Notice: Operating the engine without an air filter or a damaged air filter will allow dirt to enter the engine, causing rapid engine wear. The distributor’s limited warranty does not cover this type of damage.
CHECK FUEL LEVEL
Remove the fuel tank cap and check the fuel level with the engine stopped and on a level surface. If the fuel level is low, refill the tank. After refueling, tighten the fuel tank cap securely.
Warning: Gasoline is highly flammable and explosive. You can be burned or seriously injured when handling fuel.
- Stop the engine and keep heat, sparks, and flame away.
- Handle fuel only outdoors.
- Wipe up spills immediately.
NOTICE: Do not fill above the shoulder of the fuel strainer(maximum fuel level).
FUEL RECOMMENDATIONS
Use unleaded gasoline with a pump octane rating of 86 or higher.
These engines are certified to operate on unleaded gasoline. Unleaded gasoline produces fewer engine and spark plug deposits and extends exhaust system life.
Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid getting dirt or water in the fuel tank.
Occasionally, you may hear a light ‘‘spark knock’’ or ‘‘pinging’’ (metallic rapping noise) while operating under heavy loads. This is no cause for concern.
If a spark knock or pinging occurs at a steady engine speed under normal load, change brands of gasoline. If the spark knock or pinging persists, see an authorized servicing dealer.
Notice: Running the engine with persistent spark knock or pinging can cause engine damage. Running the engine with persistent spark knock or pinging is misuse, and the Distributor’s Limited Warranty does not cover parts damaged by misuse.
OPERATION
SAFE OPERATING PRECAUTIONS
To safely realize this pump’s full potential, you need a complete understanding of its operation and some practice with its controls.
Before operating the pump for the first time, please review the IMPORTANT SAFETY INFORMATION.
For your safety, avoid starting or operating the engine in an enclosed area, such as a garage. Your engine’s exhaust contains poisonous carbon monoxide gas, which can collect rapidly in an enclosed area and cause illness or death. Pump only fresh water that is not intended for human consumption.
Pumping flammable liquids, such as gasoline or fuel oils, can result in a fire or explosion, causing serious injury. Pumping seawater, beverages, acids, chemical solutions, or other related liquids promotes corrosion and damages the pump.
PUMP PLACEMENT
For best pump performance, place the pump near the water level and use hoses no longer than necessary. That will enable the pump to produce the most outstanding output with the least self-priming time. As the head (pumping height) increases, pump output decreases. The suction and discharge hoses’ length, type, and size can also significantly affect pump output.
Discharge head capability is always greater than suction head capability, so it is crucial for the suction head to be the shorter part of the total head. Minimizing the suction head (placing the pump near the water level) is also very important for reducing self-priming time.
Self-priming time is when it takes the pump to bring water the distance of the suction head during the initial operation.
SUCTION HOSE INSTALLATION
Use a commercially available hose and hose connector with the hose clamp provided with the pump. A non-collapsible wall or braided wire construction must reinforce the suction hose.
Do not use a hose smaller than the pump’s suction port size. Minimumhose size: WP25 (25mm), SCWP50, WP50, CP50, HP50(50mm), WT80,SCWP80-II, WP80 (80mm), WP100 (100mm).
The suction hose should be no longer than necessary. Pump performance is best when the pump is near the water level and the hoses are short. Use a hose clamp to securely fasten the hose connector to the suction hose to prevent air leakage and loss of suction. Verify that the hose connector sealing washer is in good condition.
Install the strainer (provided with the pump) on the other end of the suction hose and secure it with a hose clamp. The strainer will help to prevent the pump from becoming clogged or damaged by debris. Securely tighten the hose connector on the pump suction port.
DISCHARGE HOSE INSTALLATION
Use a commercially available hose, hose connector, and the clamp provided with the pump.
It is best to use a short, large-diameter hose to reduce fluid friction and improve pump output. A long or small-diameter hose will increase fluid friction and reduce pump output.
Tighten the clamp securely to prevent the discharge hose from disconnecting under pressure.
PRIMING THE PUMP
Before starting the engine, remove the filler cap from the pump chamber and fill it with water. Reinstall the filler cap and tighten it securely.
Notice: Operating the pump dry will destroy the pump seal. If the pump has been operated dry, stop the engine immediately and allow the pump to cool before priming.
STARTING THE ENGINE
- Prime the pump.
- Move the fuel valve lever to the ON position.
- To start a cold engine, move the choke lever to the CLOSED position. To restart a warm engine, leave the choke lever OPEN.
- Move the throttle lever from the SLOW position about 1/3 of the way toward the FAST position.
- Turn the ignition switch to the ON position.
- Pull the recoil starter grip lightly until resistance is felt, then pull it briskly. Do not allow the grip to snap back against the engine. Return it gently to prevent damage to the starter.
- If the choke lever was moved to the CLOSED position to start the engine, gradually move it to the OPEN position as the engine warms up.
- Setting the engine speed
After starting the engine, move the throttle lever to the FAST position for self-priming and check the pump output. The pump output is controlled by adjusting the engine speed. Moving the throttle lever in the FAST direction will increase pump output, and moving the throttle lever in the SLOW direction will decrease pump output.
STOPPING THE ENGINE
To stop the engine in an emergency, turn the ignition switch to OFF. Under normal conditions, use the following procedure.
1. Move the throttle lever to the SLOW position.
2. Turn the ignition switch to the OFF position.
3. Turn the fuel valve lever to the OFF position.
After use, remove the pump drain plug(see page 31) and drain the pump chamber. Remove the filler cap, and flush the pump chamber with clean, fresh water. Allow the water to drain from the pump chamber, then reinstall the filler cap and drain plug.
MAITENANCE
THE IMPORTANCE OF MAINTENANCE
Good maintenance is essential for safe, economical, and trouble-free operation. It will also help reduce air pollution.
Warning: Improperly maintaining this pump or failing to correct a problem before operation can cause a malfunction that can seriously hurt or kill you. Always follow this owner’s manual’s inspection and maintenance recommendations and schedules.
The following pages include a maintenance schedule, routine inspection procedures, and simple maintenance procedures using basic hand tools to help you properly care for your pump. Other service tasks that are more difficult or require special tools are best handled by professionals and are generally performed by a technician or other qualified mechanic.
The maintenance schedule applies to normal operating conditions. If you operate your pump under severe conditions, such as sustained high-load or high-temperature operation, or use it in unusually wet or dusty conditions, consult your servicing dealer for your needs and use recommendations.
Remember that your servicing dealer knows your pump best and is fully equipped to maintain and repair it. To ensure the best quality and reliability, use only new, genuine parts or their equivalents for repair and replacement.
Any engine repair establishment or individual may maintain, replace, or repair emission control devices and systems using parts that are “certified” to EPA standards. MAINTENANCE SAFETY.
We cannot warn you of every conceivable hazard when performing maintenance. Only you can decide whether or not to perform a given task. Failing to follow maintenance instructions and precautions properly can cause you to be seriously hurt or killed. Always follow the procedures and precautions in the owner’s manual.
Safety Precautions
Make sure the engine is off before you begin any maintenance or repairs. This will eliminate several potential hazards:
Carbon monoxide poisoning can result from engine exhaust. Ensure adequate ventilation when operating the engine, as it burns from the hot parts.
Let the engine and exhaust system cool before touching.
Injury from moving parts. Do not run the engine unless instructed to do so.
Read the instructions before you begin and ensure you have the required tools and skills.
Be careful when working around gasoline to reduce the possibility of fire or explosion. Clean parts only with a nonflammable solvent, not gasoline. Keep cigarettes, sparks, and flames away from all related parts.
MAINTENANCE SCHEDULE
Emission-related items.
Service more frequently when used in dusty areas.
Your servicing dealer should service these items unless you have the proper tools and are mechanically proficient. For service procedures, refer to the shop manual.
REFUELING
Remove the fuel tank cap and check the fuel level with the engine stopped and on a level surface. If the fuel level is low, refill the tank.
Refuel in a well-ventilated area before starting the engine. If the engine has been running, allow it to cool. Refuel carefully to avoid spilling fuel. Do not fill the fuel tank above the fuel strainer shoulder. After refueling, tighten the fuel tank cap securely.
Never refuel the engine inside a building where gasoline fumes may reach flames or sparks. Keep gasoline away from appliance pilot lights, barbecues, electric appliances, power tools, etc.
Spilled fuel is not only a fire hazard; it causes environmental damage. Wipe up spills immediately.
Notice: Do not fill above the shoulder of the fuel strainer (maximum fuel level). Refuel in a well-ventilated area before starting the engine. If the engine has been running, allow it to cool.
Refuel carefully to avoid spilling fuel. Do not fill the fuel tank above the fuel strainer shoulder. After refueling, tighten the fuel tank cap securely.
Never refuel the engine inside a building where gasoline fumes may reach flames or sparks. Keep gasoline away from appliance pilot lights, barbecues, electric appliances, power tools, etc.
Spilled fuel is not only a fire hazard; it also causes environmental damage. Wipe up spills immediately.
Notice: Fuel can damage paint and plastic. Be careful not to spill fuel when filling your fuel tank. Damage caused by spilled fuel is not covered under warranty.
ENGINE OIL CHANGE
Drain the used oil while the engine is warm. Warm oil drains wholly and quickly.
- Place a suitable container below the engine to catch the used oil, and then remove the oil filler cap/dipstick, drain plug, and sealing washer.
- Allow the used oil to drain completely, then reinstall the drain plug and tighten it securely. Please dispose of used motor oil in a manner that is compatible with the environment. We suggest you take used oil in a sealed container to your local recycling center or service station for reclamation. Do not throw it in the trash; pour it on the ground or down a drain.
- With the engine in a level position, fill the outer edge of the oil filler hole with the recommended oil.
NOTICE: Running the engine with a low oil level can damage it.
- Screw in the oil filler cap/dipstick securely.
ENGINE OIL RECOMMENDATIONS
Oil is a significant factor affecting performance and service life. Use 4-stroke automotive detergent oil.
The SAE oil viscosity and service classification are on the API label on the oil container. We recommend that you use the API SERVICE category SJ oil. This pump’s recommended operating range is 23°Fto104°F(5°C to 40°C).
AIR FILTER CLEANING
A dirty air filter will restrict airflow to the carburetor, reducing engine performance. If you operate the pump in dusty areas, clean the air filter more frequently than specified in the MAINTENANCE SCHEDULE (see page 23).
- Clean the air filter in warm, soapy water, rinse, and dry it thoroughly. You can also clean it in a nonflammable solvent and dry it thoroughly.
- Dip the air filter in clean engine oil and squeeze out all excess oil. If too much oil is left in the foam, the engine will smoke when started.
- Wipe dirt from the air cleaner base and cover using a moist rag. Be careful to prevent dirt from entering the air duct that leads to the carburetor.
SPARK PLUG SERVICE
The recommended spark plug is an F7RTC or equivalent.
Notice: Incorrect spark plugs can cause engine damage.
- Disconnect the spark plug cap, and remove any dirt from around the spark plug area.
- Remove the spark plug with a spark plug wrench.
- Inspect the spark plug. Replace it if the electrodes are worn or the insulator is cracked or chipped.
Measure the spark plug electrode gap with a suitable gauge. If necessary, correct the gap by carefully bending the side electrode. The gap should be 0.028-0.031 in (0.70-0.80mm).
Install the spark plug carefully, by hand, to avoid cross-threading.
After the spark plug seats, tighten with a spark plug wrench to compress the sealing washer. If reinstalling the used spark plug, tighten 1/8-1/4 turn after the spark plug seats. If installing a new spark plug, tighten 1/2 turn after the spark plug seats.
Notice: A loose spark plug can overheat and damage the engine, and overtightening the spark plug can damage the threads in the cylinder head.
- Attach the spark plug cap.
SPARK ARRESTER SERVICE (optional equipment)
Your engine is not factory-equipped with a spark arrester. In some areas, operating an engine without one is illegal. Check local laws and regulations.
A spark arrester is available from authorized servicing dealers. It must be serviced every 100 hours to keep it functioning as designed.
If the engine has been running, the muffler will be very hot. Allow the muffler to cool before servicing the spark arrester.
Remove the;
- 8 mm nuts and remove the muffler.
- 5 mm screws, and remove the muffler protect or from the muffler.
- 4 mm screw from the spark arrester, and remove the spark arrester from the muffler.
Use a brush to remove carbon deposits from the spark arrester screen. Be careful to avoid damaging the screen. The spark arrester must be free of breaks and holes. If it is damaged, replace it.
Install the spark arrester, muffler protector, and muffler in the reverse order of disassembly using a new gasket.
STORAGE/ TRANSPORTING
STORAGE PREPARATION
Proper storage preparation is essential for keeping your pump trouble-free and looking good. The following steps will help to keep rust and corrosion from impairing your pump’s function and appearance, and will make the engine easier to start when you use the pump again.
Cleaning
1. Wash the engine and pump.
Wash the engine by hand, and prevent water from entering the air cleaner or muffler opening. Keep water away from controls and other difficult places to dry, as water promotes rust.
Notice:
A garden hose or pressure washing equipment can force water into the air cleaner or muffler opening. Water in the air cleaner will soak the air filter, and water that passes through the filter or muffler can enter the cylinder, causing damage.
Water contacting a hot engine can cause damage. If the engine has been running, allow it to cool for at least half an hour before washing.
2. Wipe dry on all accessible surfaces.
3. Fill the pump chamber with fresh water, start the engine outdoors, and let it run until it reaches the normal operating temperature to evaporate external water.
Notice: A dry operation will damage the pump seal. Be sure the pump chamber is filled with water before starting the engine.
4. Stop the engine and allow it to cool.
5. Remove the pump drain plug, and flush the pump with clean, fresh water. Allow the water to drain from the pump chamber, and then reinstall the drain plug.
6. After the pump is clean and dry, touch up any damaged paint and coat areas that may rust with a light film of oil. Lubricate controls with a silicone spray lubricant.
Fuel
Gasoline oxidizes and deteriorates in storage. Old gasoline causes hard starting and leaves gum deposits that clog the fuel system. If the gasoline in your engine deteriorates during storage, you may need to have the carburetor and other fuel system components serviced or replaced.
The time that gasoline can be left in your fuel tank and carburetor without causing functional problems will vary with factors such as the gasoline blend, storage temperatures, and whether the fuel tank is partially or fully filled. The air in a partially filled fuel tank promotes fuel deterioration.
Very warm storage temperatures accelerate fuel deterioration. If the gasoline was not fresh when you filled the fuel tank, fuel deterioration problems may occur within a few months or even less.
The Distributor’s Limited Warranty does not cover fuel system damage or engine performance problems resulting from neglected storage preparation. You can extend fuel storage life by adding a fuel stabilizer formulated for that purpose, or you can avoid fuel deterioration problems by draining the fuel tank and carburetor.
Adding a Fuel Stabilizer to Extend Fuel Storage Life
When adding a fuel stabilizer, fill the fuel tank with fresh gasoline. If only partially filled, the air in the tank will promote fuel deterioration during storage. If you keep a container of gasoline for refueling, be sure that it contains only fresh gasoline.
1. Add fuel stabilizer following the manufacturer’s instructions.
2. After adding a fuel stabilizer, run the engine outdoors for 10 minutes to ensure that treated gasoline has replaced the untreated gasoline in the carburetor.
Notice: A dry operation will damage the pump seal. Ensure the pump chamber is filled with water before starting the engine.
3. Stop the engine, and move the fuel valve lever to the OFF position.
Draining the Fuel Tank and Carburetor
1. Place an approved gasoline container below the carburetor, and use a funnel to avoid spilling fuel.
2. Remove the carburetor drain bolt and sediment cup, then move the fuel valve lever to the ON position.
3. After all the fuel has drained into the container, reinstall the drain bolt and sediment cup. Tighten them securely.
STORAGE PROCEDURE
- Change the engine oil.
- Remove the spark plug.
- Pour a tablespoon(5-10 cc)of clean engine oil into the cylinder.
- Pull the starter grip several times to distribute the oil in the cylinder.
- Reinstall the spark plug and attach the spark plug cap.
- Pull the recoil starter grip slowly until resistance is felt. This will close the valves so moisture cannot enter the engine cylinder. Return the coil starter grip gently.
STORAGE PRECAUTIONS
If your pump will be stored with gasoline in the fuel tank and carburetor, it is essential to reduce the hazard of gasoline vapor ignition. Select a well-ventilated storage area away from any appliance with a flame, such as a furnace, water heater, or clothes dryer. Also, avoid any area with a spark-producing electric motor or where power tools are operated.
If possible, avoid storage areas with high humidity because that promotes rust and corrosion.
Unless all fuel has been drained from the fuel tank, leave the fuel valve lever in the OFF position to reduce the possibility of fuel leakage.
Place the pump on a level surface. Tilting can cause fuel or oil leakage.
Cover the pump with the engine and exhaust system to keep out dust. A hot engine and exhaust system can ignite or melt some materials. Do not use sheet plastic as a dust cover. A nonporous cover will trap moisture around the pump, promoting rust and corrosion.
REMOVAL FROM STORAGE
Check your pump as described in the CHECK BEFORE OPERATION section.
Fill the tank with fresh gasoline if the fuel was drained during storage preparation. If you keep a gasoline container for refueling, ensure it contains only fresh gasoline. Gasoline oxidizes and deteriorates over time, causing hard starting.
The engine might smoke briefly at startup if the cylinder was coated with oil during storage preparation. This is normal.
TRANSPORTING
If the pump has been running, allow the engine to cool for at least 15 minutes before loading it on the transport vehicle. A hot engine and exhaust system can burn you and ignite some materials.
Keep the pump level when transporting to reduce the possibility of fuel leakage. Move the fuel valve lever to the OFF position.
Gasoline Engine Water Pump Troubleshooting
TECHNICAL & CONSUMER INFORMATION
Carburetor Modification for High Altitude Operation
At high altitudes, the standard carburetor air-fuel mixture will be too rich. The performance will decrease, and fuel consumption will increase. Averyrich mixture will also foul the spark plug and cause a hardstart.
Operating at an altitude different from that at which this engine was certified for extended periods may increase emissions.
Specific modifications to the carburetor can improve high-altitude performance. If you always operate your pump at altitudes above 5,000 feet (1,500 meters), have your servicing dealer modify this carburetor. When operated at a high altitude with the carburetor modifications for high altitude use, this engine will meet each emission standard throughout its useful life.
Even with carburetor modification, engine horsepower will decrease by about 3.5% for every 1,000 feet (300 meters) increase in altitude. The effect of altitude on horsepower will be greater than this if no carburetor modification is made.
Notice: When the carburetor has been modified for high-altitude operation, the air-fuel mixture will be too lean for low-altitude use. Operational altitudes below 5,000 feet (1,500 meters) with a modified carburetor may cause the engine to overheat and result in serious engine damage. For use at low altitudes, have your servicingdealerreturnthe carburetor to its original factory specifications.
Oxygenated Fuels
Some conventional types of gasoline are blended with alcohol or an ether compound. These types of gasoline are collectively referred to as oxygenated fuels. To meet clean air standards, some areas of the United States and Canada use oxygenated fuels to help reduce emissions.
If you use oxygenated fuel, be sure it is unleaded and meets the minimum octane rating requirement. Before using oxygenated fuel, try to confirm its contents. Some states/provinces require this information to be posted on the pump.
The following are the EPA-approved percentages of oxygenates:
ETHANOL – (ethyl or grain alcohol) 10% by volume.
You may use gasoline containing up to 10% ethanol by volume. Gasoline containing ethanol may be marketed under the name ‘‘Gasohol’’.
MTBE – (methyl tertiary butyl ether) 15% by volume.
You may use gasoline containing up to 15% MTBE by volume.
METHANOL – (methyl or wood alcohol) 5% by volume.
You may use gasoline containing up to 5% methanol by volume as long as it includes cosolvents and corrosion inhibitors to protect the fuel system. Gasoline containing more than 5% methanol by volume may cause starting and/or performance problems and damage the metal, rubber, and plastic parts of your fuel system.
If you notice any undesirable operating symptoms, try another service station or switch to another brand of gasoline. Fuel system damage or performance problems resulting from using an oxygenated fuel containing more than the percentages of oxygenates mentioned above are not covered under warranty.
Emission Control System Information
Source of Emissions
The combustion process produces carbon monoxide, oxides of nitrogen, and hydrocarbons. Control of hydrocarbons and oxides of nitrogen is very important because, under certain conditions, they react to form photochemical smog when exposed to sunlight.
Carbon monoxide does not react in the same way, but it is toxic.
This utilizes lean carburetor settings and other systems to reduce carbon monoxide emissions, nitrogen oxides, and hydrocarbons.
Tampering and Altering
Tampering with or altering the emission control system may increase emissions beyond the legal limit. Among those acts that constitute tampering are:
- Remove or change any part of the intake, fuel, or exhaust systems.
- Altering or defeating the governor linkage or speed-adjusting mechanism to cause the engine to operate outside its design parameters.
Problems That May Affect Emissions
If you know of any of the following symptoms, have your engine inspected and repaired by your servicing dealer.
- Hard starting or stalling after starting.
- Rough idle.
- Misfiring or backfiring under load.
- Afterburning (backfiring).
- Black exhaust smoke or high fuel consumption.
Replacement Parts
The emission control systems on your engine were designed, built, and certified to conform to EPA and California emission regulations. We recommend the use of genuine parts whenever you have maintenance done. These original-design replacement parts are manufactured to the same standards as the original parts so that you can be confident of their performance. The use of replacement parts that are not of the original design and quality may impair the effectiveness of your emission control system.
A manufacturer of an aftermarket part assumes that the part will not adversely affect emission performance. The manufacturer or rebuilder of the part must certify that the use of the part will not fail in the engine to comply with emission regulations.
Maintenance
Follow the maintenance schedule. Remember that this schedule assumes that your machine will be used for its designed purpose. Sustained high-load or high-temperature operation or use in unusually wet or dusty conditions will require more frequent service.
Air Index
An Air Index Information hang tag/label is applied to engines certified to an emission durability period per the California Air Resources Board requirements. The bar graph is intended to allow you, our customer, to compare the emissions performance of available engines. The lower the Air Index, the less pollution.
The durability description is intended to provide you with information relating to the engine’s emission durability period. The descriptive term indicates the applicable life period for the engine’s emission control system. See your Emission Control Warranty for additional information.
The Air Index Information hang tag must remain on the pump until it is sold. Remove it before operating the pump.
CONSUMER INFORMATION
Publications
These publications provide additional information on maintaining and repairing your pump. You can order them from your pump dealer.
Parts Catalog
This manual provides complete, illustrated parts lists.
Customer Service Information
Servicing dealership personnel are trained professionals. They should be able to answer any questions you may have. If you encounter a problem that your dealer does not solve to your satisfaction, please discuss it with the dealership’s management.
The Service Manager or General Manager can help. Almost all problems are solved in this way.
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VEVOR Gasoline Engine Water Pump, 3-inch, 7HP 265 GPM, 142ft Lift, 22ft Suction Manual
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