20 Most Recent Yamaha 2300 Watt Generator - EF2600 Questions & Answers

As you describe the problem, the reason is unstable load handling.
This means that the fuel or air is not enough.

When begin to be unsteady:
  1. If smoke comes out of muffler - the input air is not sufficient. Try to clean or change air filter (cleaner).
  2. If no smoke, the fuel is not enough. The reason may be the mechanical governor, or the fuel supply to it, fuel filter/strainer etc.

Yamaha 2300 Watt... | Answered on Sep 24, 2019

You can but a carbureator cleaning kit at most of the auto parts stores. Comes in a gallon can. Just dissasemble the carb, put the parts in the basket let it sit overnight, and they shoule be perfectly clean in the morning.

Yamaha 2300 Watt... | Answered on Aug 29, 2014

Hi and welcome to FixYa, I am Kelly
On the rotor you need to read from the rectifier to the metal for shorts. No shorts allowed. There is a varistor as part of the rotor winding circuit and if the varistor has failed the rotor will not work. If the vairstor fails usually there is a problem with the rotor wnding. I can tell you I have had them read just fine wire to wire but... they were still defective.

Also check the condenser wires from the control panel through the stator winding. (usually yellow) Disconnect one of the wires from the condenser and probe the terminals. This should read less than 5 ohms. INSPECT the condensor wires..... there is often a quick disconnect terminal somewhere in the wires. These terminals are cylinder shaped and have been known to melt.
Read across the condensor itself with the meter on R x 10K you should see a momentary jump in resistance and then the meter drifts quickly to infinity each time you REVERSE the test leads and probe the condenser.

There is also a SQUARE diode pack with 3 or 4 wires inside the control panel that usually has a single mounting screw. One terminal will be 90 deg out from the rest of them (Common) read the terminals of the diode pack to the common. Reverse the leads and do it again. If should read continuity in one polarity and open in the other (leads reversed).

As for the stator checks reading wire to wire is good... but read wire to stator case also. No shorts allowed.

I believe you will either find a bad rotor or a problem in the condenser circuit.

Thanks for choosing FixYa,

Yamaha 2300 Watt... | Answered on May 03, 2011

Most of the small portable generators will depend on the engine speed to regulate the voltage. If the motor is at the correct speed you are getting 120 volts 60 hertz, if not it will read lower like 115 volts 55 hertz or so. This can be fixed by adjusting the governor, or idle speed needle.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

Yamaha 2300 Watt... | Answered on Feb 16, 2011

change bearing no alternator rotor. If not helps there are two cranckshaft bearings.

Yamaha 2300 Watt... | Answered on Aug 05, 2010

might need to excite the generator with a drill.

Yamaha 2300 Watt... | Answered on Jun 14, 2009

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

Yamaha... | Answered on Apr 11, 2020

Hi, maybe you can contact your supplier who supplies the generator to you.

If you want to have diesel generator set in future, please visit at https://starlightgenerator.en.made-in-china.com

Yamaha... | Answered on Dec 07, 2019

More supports, please see at www.dieselgeneratortech.com

Yamaha... | Answered on Oct 22, 2019

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.

Yamaha... | Answered on Oct 22, 2019

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" .

Yamaha... | Answered on Oct 13, 2019

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

Yamaha... | Answered on Oct 09, 2019

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