Zenoah manual

For questions or assistance, please visit our website at www. Inspection or Services If this Product needs to be inspected or serviced and is compliant in the country you live and use the Product in, please use the Horizon Online Service Request submission process found on our website or call Horizon to obtain a Return Merchandise Authorization RMA number. Pack the Product securely using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection.

Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise until it arrives and is accepted at our facility. If you do not have internet access, please contact Horizon Product Support to obtain a RMA number along with instructions for submitting your product for service.

When calling Horizon, you will be asked to provide your complete name, street address, email address and phone number where you can be reached during business hours. When sending product into Horizon, please include your RMA number, a list of the included items, and a brief summary of the problem. A copy of your original sales receipt must be included for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.

If you have any issue with a LiPo battery, please contact the appropriate Horizon Product Support office. Warranty Requirements For Warranty consideration, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met, your Product will be serviced or replaced free of charge. By submitting the item for service you are agreeing to payment of the service without notification.

Service estimates are available upon request. You must include this request with your item submitted for service. Do not operate this tool when you are tired, ill, or under the influence of alchohol, drugs, or medication.

Always wear eye or face protection and hearing protection. Do not wear loose clothing, jewelry, short trousers, sandals, or go barefoot. Do not wear anything which might be caught by branches or moving part of the unit. Secure hair so it is above shoulder length. Never start or run the engine inside a closed room or building. Exhaust gases contain dangerous carbon monoxide. Before starting the engine, inspect the entire unit for loose fasteners and fuel leakage.

Make sure that the cutting attachment is properly installed and securely fastened. Be sure the blade guard is attached in place.

Fuel is highly flammable. Always keep open flames and sparks away from the unit and fuel depot. Do not smoke while refueling the unit or mixing fuel. When refueling the unit, make sure to stop the engine and allow it to cool down.

Wipe spilled fuel completely from the unit. Move at least 3 meters away from fueling site before starting the engine. Check the condition of working area to avoid any accident by hitting hidden obstacles such as stumps, stones, cans, or broken grass.

Keep bystanders and animals at least 15 meters away from the operating point, If you are approached, immediately stop the engine. Keep firm footholds and balance at all times. Do not use the unit where footing is unsteady or slippery. Keep cutting attachment below waist level. Keep all parts of your body away from the rotating cutting attachment and hot surfaces.

Warn the operator of the danger of blade thrust. Kick back. Blade thrust may occur when the spinning blade contacts a solid object in the critical area. A dangerous reaction may occur causing the entire unit and operator to be thrust violently. This reaction is called Kick back. As a result, the operator can lose control of the unit which can cause serious or fatal injury. Kick back is more likely to occur in areas where it is difficult to see the material to be cut.

When inspecting or servicing the unit, make sure to stop the engine and disconnect the spark plug as necessary. Cover the blade when the transporting or storing the unit. Secure the unit before for storage or transporting to prevent loss of fuel, damage or injury. When the unit is turned off, make sure the cutting attachment has stopped before the unit is set down. For units equipped with a clutch, be sure the cutting attachment stops turning when the engine idles.

Use only for tasks explained in the instruction handbook. Discard blades that are bent, warped, cracked, broken or damaged in any way.

Instructions on stopping a coasting blade. A blade can injure while it continues to spin after the engine is stopped or throttle control is released. Stop the engine and blade before removing material that is blocking or entangling the cutting attachment. Use a sharp blade.

A dull blade is more likely to snag and thrust. Be sure to set flat washers or a metal plate on the reverse side of the mount to prevent the bolts from sinking into the mount. Periodically check the engine mount for loose bolts. Since the engine is equipped with a floatless carburetor with a diaphragm pump, the direction of the cylinder and position of the fuel tank can be freely selected. Note carefully if the engine is vibrating at idle, as excessive vibration can result in erratic engine operation due to overflow at the carburetor.

It is suggested that the bolts for the muffler be coated with threadlock when mounting the muffler to the engine. No specific break-in is required. The engine is gradually broken-in as it is used, and the output power increases gradually as the engine breaks in. Before attempting to start the engine, be sure to read through all the steps for starting the engine as outlined below:. Zenoah engines are equipped with the ultra compact C. Note: The magneto system is timed in such a way that when the compression stroke starts refer to Figure 1-A sparks are never produced on the spark plug, no matter how fast the propeller is flipped.

The correct starting procedure is to quickly flip the propeller when the edge of the magnet on the rotor is approaching the coil Figure 1-B. This means that the propeller should be quickly flipped at about 90 degrees in crank angle before the compression stroke is about to start. Make sure the spark glow plug s are installed and tightened.

Check the condition of the plug cap for cracks or breaks. Be sure the propeller is properly secured. Make sure the fuel tank line s are properly connected.

The main line should be connected to the carburetor spray bar. Be certain the mufflers are installed properly. Choke the engine and turn the propeller through a. Set the throttle valve at the idle position or at the position slightly open from idle.

Quickly flip the propeller in a counterclockwise direction according to the procedure described in the note above. The engine should start after a few flips of the propeller.

Be sure to open the choke when the initial firing of the engine is heard. When the choke is opened, be sure to close the throttle valve to a position near the idle position before the next flipping of the propeller is attempted. CAUTION: If the engine is started when the throttle is wide open, a great thrusting force will be generated, which can be very dangerous.

If you do not use a chicken stick to start the engine, be sure to wear a thick glove when flipping the propeller and use all fingers, except the thumb, for the flipping operation. Do not over-rev the engine.

These engines are designed to develop maximum output with the standard muffler and the recommended propeller size. Push the priming bulb located on the carburetor until fuel appears in the priming bulb for helicopter. Quickly pull the starter cord until the initial firing of the engine is heard. When the initial firing is heard, open the choke, set the throttle valve at the idle position or at the position slightly open from the idle position and quickly pull the starter cord a few more times until the engine starts.

For helicopter operation, you should adjust the rotorpitch to obtain a 9, to 10, rpm of the engine at full throttle operation. The ability to shut down the engine in an emergency is extremely important. For stopping the engine, the black lead wire from the coil should be grounded to the engine. The carburetor is provided with three adjustment screws, which are factory set to the best approximate positions. They may need minor adjustment, depending upon the temperature, humidity, atmospheric pressure altitude , etc.

Start the engine without making any adjustments. Make adjustments only when the engine shows signs of inefficient operation. Standard settings of each needle is as follows:. Idle Screw: Turning this screw clockwise increases the idling rpm. Turning it counterclockwise decreases the idling rpm. Low-Speed Needle: This is the fuel adjust screw not the air screw. Turning this needle clockwise makes the gas mixture leaner, and turning it counterclockwise makes it richer.

High-Speed Needle: Turning this needle clockwise makes the gas mixture leaner, and turning it counterclockwise makes it richer. Note: Do not tighten the high and low speed needles too tightly. When the engine has just started and is not warm enough, there may be insufficient acceleration and the engine may die.

Be sure to allow the engine to warm up at idle for a few minutes before conducting normal operation. Use a Zenoah quality 2-stroke oil mixed at 32 to 1.

Use the recommended spark plugs. Use the proper propeller size and balance the propeller prior to use. Always adjust the engine to a slightly rich setting. For long-term storage, make sure there is no fuel left in the tank or the engine. Remove the spark plug s and apply several drops of high-quality oil e. Rotate the crankshaft several times. Store the engine in the box it came in or on the airplane with the nose down in order to keep oil in the bearings.

The engine can be disassembled or reassembled without any specific difficulties, but note the following:. For disassembling, the special tools shown in the parts list are required stopper, puller assembly , in addition to general tools. Be sure to use a new gasket when the crankcase and cylinder have been disassembled. Note: Because the crankshaft is of the assembly type, do not disassemble, hit or twist its end.

Dismount the engine from the model. Remove the carburetor and insulator carefully without damaging the gasket. Remove the spark plug and ignition module. Remove the rotor flywheel. If it cannot be detached, use a plastic hammer and tap the part lightly.

Screw the stopper in place of the spark plug, then turn the rotor counterclockwise until the piston touches the stopper. Take care, as it can cause damage to the piston or connecting rod if the stopper is not screwed in to the bottom. Loosen and remove the rotor securing nut. Remove the rotor by using the puller.

Do not hit the crankshaft with the plastic hammer, as this can increase the runout of the shaft.