20 Most Recent Yamaha Ef600 Generator/inverter Repair/service Manual Questions & Answers

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Try taking out your spark plug and see if it needs cleaned or replaced

Based on the search results there are a explanations, for the clunking noise in your Yamaha EF2600FW generator; 1. Load handling; One potential reason could be that the generator is facing difficulties in managing the load, which could be due to fuel or air supply. This can result in the generator producing a clunking noise. 2. Fuel shortage; Another possible cause might be a lack of fuel supply to the generator leading to a knocking sound. It is advisable to address this fuel issue before operating the generator to prevent any damage. 3. Storage conditions; The clunking noise could also arise from storage conditions. Over time certain components like piston slap or dry rod bearings may develop problems resulting in sounds when the generator is running. To diagnose and resolve the problem with your generator it is recommended that you take the steps; Check and ensure a fuel supply. If needed, clean or replace the carburetor. Inspect the generator thoroughly for any signs of damage or wear in areas like piston and rod bearings. These actions should help. Rectify any issues causing the clunking noise, in your Yamaha EF2600FW generator. If the problem continues you might need to reach out to a technician or get in touch, with Yamaha customer support for help. Always prioritize safety when dealing with generators or any other equipment. If you feel uncertain or uncomfortable about troubleshooting or making repairs yourself it's best to seek assistance, from a professional.

The reasons of no power generation: 1. The voltmeter of the control panel is damaged or the wiring is in poor contact. This situation is generally after the diesel generator starts normally, and the voltage on the meter sometimes does not move. It is necessary to use a multimeter to measure the U, V, W, N phases of the motor, and the phases between U, V, and W. The voltage is about 400v, and the voltage between single-phase U, V, W and N is about 230v. 2. The air switch on the electric ball in the diesel generator is damaged: the phenomenon that occurs is that the diesel generator is normal when it is started, and it trips when the load is turned on. 3. Brushed motor equipped with diesel generator: The disadvantage of brushed motor is that demagnetization occurs occasionally, so it is necessary to keep 1-2 pairs of carbon brushes to prevent this situation. 4. The starting elements are not reached: the starting elements of diesel generators refer to the speed of 1500 rpm, frequency of 50HZ, and voltage of 400v. Many users feel that the noise of diesel generators will be very large when this data value is reached, so they reduce the speed by themselves. , the consequence is that the voltage is not enough, the frequency is not enough, and the power is not generated. After a long time, the power of the diesel generator will be insufficient. 5. Damage to the voltage regulating plate: The function of the voltage regulating plate is to adjust the excitation current correspondingly according to the change of the generator load, so as to maintain the terminal voltage as a given value, which can obviously smell the smell of burning. The above are the common reasons for the failure of diesel generators to generate electricity summarized by our editor. We hereby suggest that if your diesel generator has not expired, please contact the diesel generator manufacturer to provide guidance on operation, and try not to repair it yourself. More solutions, you can visit https://www.dbdieselgenerator.com

Very old thread but here goes., My 2400is was surging under light load but I was able to fix that with a new idle jet and thorugh carb cleaning. Now, it doesn't respond to various loads and will not rev up, ie., stays at idle and quits. Manually opening the throttle works fine. I took out the solenoid and cleaned the spindle but didn't help. When it was out, turning it had some resistance (felt like a rehostat, a bit rough and definitely not spinning freely) . Dunno how it should feel but, for example, with the engine not running if I move the throttle (controlled by the solenoid) it will "stick" in that position and not return to the idle position by the return spring. Would like to know if that's normal or not! With the engine running, it will return to the idle position and I use a clothespin to keep the revs up even under no load. At least that way it stays running and supplies adequate power. Ideas?

The OHV engine requires periodic valve adjustment.

Check the brush holder for worn brushes. If they seem ok then the voltage regulator has failed.

The generator does not operate in accordance with the specified technical conditions, such as too high stator voltage, iron loss increases; if the load current is too large, the copper loss of the stator winding increases; if the frequency is too low, the cooling fan speed becomes slow, affecting the heat dissipation of generator; the power factor is too low, so that the rotor excitation current increases, resulting in the rotor heating. Check whether the indication of monitoring instrument is normal. If it is abnormal, necessary adjustment and treatment must be carried out to operate the generator in accordance with the specified technical conditions. Diesel generator set more supports: www.dieselgeneratortech.com

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Here is some reasons for reference: 1.After the diesel generator is stopped, the residual magnetism is often lost, because the material used for the magnetic pole of the exciter is close to the soft steel, and the residual magnetism is small. After the shutdown, when there is no current in the excitation winding, the magnetic field will disappear. 2.The magnetic pole of the diesel generator loses its magnetic properties. 3.Damage of excitation circuit components or circuit breakage, short circuit or grounding phenomena. 4.The exciter brush is not in good contact with the commutator and pressure of brush holder is insufficient. 5.Excitation winding wiring error, opposite polarity. 6.Stator winding and rotor winding of generator set open circuit. 7.Poor contact between diesel generator brush and slip ring, or insufficient brush pressure. 8.Diesel generator lead wire wiring is loose or switch contact is poor. 9.The fuse box is fused. 10.The "auto-manual-de-excitation" switch on the control panel is in the de-excitation position (automatic generator set has "auto-manual-de-excitation" switch). 11.The voltmeter is damaged. 12.Rotary rectifier module is damaged.

Start by replacing fuel. Completely drain the tank and carburetor fuel bowl. Do not use what fuel you may have, get 2 gallons of fresh fuel from gas station. If problem clears then likely water in fuel.

If still backfires with fresh fuel then likely an ignition issue. Failing ignition module or possibly a sheared flywheel key. Try reducing spark plug gap to .025" .

Mybe the problem is the frequency. Visit the website www.dieselgeneratortech.com to get more support.