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Release the four spring tabs from the air cleaner cover, and remove the cover. Remove the foam filter element. Remove the paper filter element. Inspect both air filter elements, and replace them if they are damaged.
Always replace the paper air filter element at the scheduled interval see page 6. Clean the air filter elements if they are to be reused. Paper filter element: Tap the filter element several times on a hard surface to remove dirt, or blow compressed air [not exceeding kPa 2. Never try to brush off dirt; brushing will force dirt into the fibers.
Replace the paper filter element if it is excessively dirty. Foam air filter element: Clean in warm soapy water, rinse, and allow to dry thoroughly. Or clean in non-flammable solvent and allow to dry.
Do not put oil on the foam element. Wipe dirt from the inside of the air cleaner base and cover, using a moist rag. Be careful to prevent dirt from entering the chamber that leads on the carburetor. Place the foam air filter element in the air cleaner cover, then reinstall the paper air filter element and cover to the air cleaner base. Hook the four spring tabs securely. If the fuel filter is found with excessive water accumulation or sediment, take the engine to your authorized Honda servicing dealer.
The recommended spark plugs have the correct heat range for normal engine operating temperatures. For good performance, the spark plugs must be properly gapped and free of deposits. Disconnect the spark plug caps, and remove any dirt from around the spark plug area. Inspect the spark plugs.
Replace them if damaged, badly fouled, if the sealing washer is in poor condition, or if the electrode is worn. Measure the spark plug electrode gaps with a wire-type feeler gauge. Correct the gap, if necessary, by carefully bending the side electrode.
Install the spark plugs carefully, by hand, to avoid crossthreading. A loose spark plug can overheat and damage the engine. Overtightening the spark plug can damage the threads in the cylinder head. Attach the spark plug caps to the spark plugs. Your engine is not factory-equipped with a spark arrester. The spark arrester is optional part. In some areas, it is illegal to operate an engine without a spark arrester.
Check local laws and regulations. A spark arrester is available from authorized Honda servicing dealers. The spark arrester must be serviced every hours to keep it functioning as designed.
If the engine has been running, the muffler will be hot. Allow it to cool before servicing the spark arrester. Remove the 6 mm flange bolts from the muffler protector, and remove the muffler protector.
Remove the special screws 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. Replace the spark arrester if it is damaged. Install the spark arrester and muffler protector in the reverse order of disassembly. Proper storage preparation is essential for keeping your engine trouble-free and looking good.
If the engine has been running, allow it to cool for at least half an hour before cleaning. Clean all exterior surfaces, touch up any damaged paint, and coat other areas that may rust with a light film of oil. Using 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 air filter or muffler can enter the cylinder, causing damage. Depending on the region where you operate your equipment, fuel formulations may deteriorate and oxidize rapidly. Please check with your servicing dealer for local storage recommendations. Gasoline will oxidize and deteriorate in storage.
Deteriorated gasoline will cause hard starting, and it 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 length of time that gasoline can be left in your fuel tank and carburetor without causing functional problems will vary with such factors as gasoline blend, your storage temperatures, and whether the fuel tank is partially or completely filled.
The air in a partially filled fuel tank promotes fuel deterioration. Very warm storage temperatures accelerate fuel deterioration.
Fuel deterioration problems may occur within a few months, or even less if the gasoline was not fresh when you filled the fuel tank. Fuel system damage or engine performance problems resulting from neglected storage preparation are not covered under the. You can extend fuel storage life by adding a gasoline stabilizer that is formulated for that purpose, or you can avoid fuel deterioration problems by draining the fuel tank and carburetor. When adding a gasoline stabilizer, fill the fuel tank with fresh gasoline.
If only partially filled, 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.
After adding a gasoline stabilizer, run the engine outdoors for 10 minutes to be sure that treated gasoline has replaced the untreated gasoline in the carburetor. Gasoline is highly flammable and explosive, and you can be burned or seriously injured when handling fuel.
Handle fuel only outdoors. Disconnect the fuel line to the engine, and drain the fuel tank into an approved gasoline container. After draining is completed, reconnect the fuel line. Loosen the carburetor drain screw, and drain the carburetor into an approved gasoline container.
After draining is completed, tighten the carburetor drain screw. Change the engine oil see page 8. Remove the spark plugs see page Pour a tablespoon 5 10 cm 5 10 cc of clean engine oil into each cylinder. Turn the engine for a few seconds by turning the engine switch to the START position to distribute the oil in the cylinders.
If your engine will be stored with gasoline in the fuel tank and carburetor, it is important to reduce the hazard of gasoline vapor ignition. Select a well-ventilated storage area away from any appliance that operates with a flame, such as a furnace, water heater, or clothes dryer.
Also avoid any area with a sparkproducing electric motor, or where power tools are operated. If possible, avoid storage areas with high humidity, because that promotes rust and corrosion.
With the engine and exhaust system cool, cover the engine 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 engine, promoting rust and corrosion. Remove the battery and store it in a cool, dry place. Recharge the battery once a month while the engine is in storage.
This will help to extend the service life of the battery. If the fuel was drained during storage preparation, fill the tank with fresh gasoline. If you keep a container of gasoline for refueling, be sure it contains only fresh gasoline. Gasoline oxidizes and deteriorates over time, causing hard starting. If the cylinders were coated with oil during storage preparation, the engine may smoke briefly at startup.
This is normal. If the engine has been running, allow it to cool for at least 15 minutes before loading the engine-powered equipment on the transport vehicle. A hot engine and exhaust system can burn you and can ignite some materials.
Keep the engine level when transporting to reduce the possibility of fuel leakage. Record the engine serial number, type and purchase date in the space below. You will need this information when ordering parts and when making technical or warranty inquiries. Be careful not to connect the battery in reverse polarity, as this will short circuit the battery charging system.
Always connect the positive battery cable to the battery terminal before connecting the negative battery cable, so your tools cannot cause a short circuit if they touch a grounded part while tightening the positive battery cable end. A battery can explode if you do not follow the correct procedure, seriously injuring anyone nearby.
Wash hands after handling. Connect the battery positive cable to the starter solenoid terminal as shown. Connect the battery negative cable to an engine mounting bolt, frame bolt, or other good engine ground connection. Connect the battery positive cable to the battery positive terminal as shown. Connect the battery negative cable to the battery negative terminal as shown.
Coat the terminals and cable ends with grease. The throttle and choke control levers are provided with holes for optional cable attachment. The following illustrations show installation examples for a solid wire cable and for a flexible, braided wire cable. At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug and cause hard starting. Operation at an altitude that differs from that at which this engine was certified, for extended periods of time, may increase emissions.
High altitude performance can be improved by specific modifications to the carburetor. If you always operate your engine at altitudes above 1, meters 5, feet , have your servicing dealer perform this carburetor modification. This engine, when operated at high altitude with the carburetor modifications for high altitude use, will meet each emission standard throughout its useful life.
Even with carburetor modification, engine horsepower will decrease about 3. The effect of altitude on horsepower will be greater than this if no carburetor modification is made.
When the carburetor has been modified for high altitude operation, the air-fuel mixture will be too lean for low altitude use. Operation at altitudes below 1, meters 5, feet with a modified carburetor may cause the engine to overheat and result in serious engine damage. For use at low altitudes, have your servicing dealer return the carburetor to original factory specifications. 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 subjected to sunlight. Carbon monoxide does not react in the same way, but it is toxic.
Additionally, Honda fuel systems utilize components and control technologies to reduce evaporative emissions. EPA, California and Canadian regulations require all manufacturers to furnish written instructions describing the operation and maintenance of emission control systems. The following instructions and procedures must be followed in order to keep the emissions from your Honda engine within the emission standards.
Tampering with or altering the emission control system may increase emissions beyond the legal limit. Among those acts that constitute tampering are:. Removal or alteration of 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.
If you are aware 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.
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