20 Most Recent Yamaha 4500 Watt Electric Start Generator - EF5200DE Questions & Answers


if the generator has been sitting for a while you might have to excite the magnets to start producing power. plug in a reversible drill and with the generator running turn the drill in the reverse direction by hand while holding the trigger in the forward position.

Yamaha 4500 Watt... | Answered on Jan 06, 2020


I can not see why you want to use that oil. That would be a good oil to use if you have a lot of hours on that engine. Otherwise it is a little high on upper viscosity number unless it is running really hot and I doubt that is the case.

Yamaha 4500 Watt... | Answered on Jul 22, 2013


this is a brushless generator, that means it has a condensor, this is a "normal" fail, see it happen a lo on brushless. Upgrade to a metal can condensor (gets less heat and is a better construction and the problem should be less frequent...

If you need further help, I’m available over the phone at https://www.6ya.com/expert/robert_573a00ba7e399076

Yamaha 4500 Watt... | Answered on Mar 01, 2011


change the spark plug clean the fuel tank replace filters and oil change fuel line if cracking or stiff.
remove carb bowl clean out with carb clean remove any sch-lack from old gas run and test power.
hope this helps

Yamaha 4500 Watt... | Answered on Aug 31, 2010


sounds like the carberator needs cleaning and the linkage that makes it open up under load. it works off the flywheel. a lot of generator problems are gas related. water, trash and varnish build up in the carb.

Yamaha 4500 Watt... | Answered on Aug 30, 2010


You should have automatic or manual choke control. Try to find it and open it during start. After that you can close it if stable work is achieved.

Yamaha 4500 Watt... | Answered on Jun 13, 2010


Make sure your generator is rated high enough to run you a/c. Also is you a/c 120v or 240v? Do you have it plugged into the right voltage?

Yamaha 4500 Watt... | Answered on May 12, 2010


Check the breakers.take it back if its brand new.

Yamaha 4500 Watt... | Answered on May 10, 2010


Check if a circuit breaker is tripped and reset it.

Yamaha 4500 Watt... | Answered on Apr 01, 2010


You MAY have blown the rotating diodes on the rotor.

This would require servicing.

Yamaha 4500 Watt... | Answered on Jan 02, 2010


could be a bad transfer switch.

Yamaha 4500 Watt... | Answered on Jul 16, 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

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