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

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 2 days ago

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

Yamaha... | Answered on Oct 09, 2019

There are several types of overload to consider:
A. Catastrophic: something has gone very wrong. There may be a phase to phase short or two shorts to ground. This assumes you have an ungrounded system. With luck the main circuit breaker will open without destroying itself;
B. Steady state over current: The load on the generator is greater than the rating on the circuit breaker. Time to parallel in another generatoror shed load;
C. Transient over current: Suppose you were running two generators in parallel and one failed. The remaining machine may experience an over current condition that causes the breaker to trip. You can also have transient breaker trips upon activation of a large motor e.g., fire pump or bow thruster;
D.Thermal: There is a big difference in sea water temperature as you travel the world. It is possible to have an overload caused by the diesel engine's inability to shed heat in the tropics. Continued operation could damage the diesel engine. Again, parallel in another generator or shed load.

Yamaha... | Answered on Sep 30, 2019

Is it overloaded? That's the most common reason!

Yamaha... | Answered on Mar 24, 2019

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