Yamaha Electrical Supplies - Page 6 - Recent Questions, Troubleshooting & Support


If you have not properly shut down the unit after use you will have likely had fuel remaining in the carburetor. The fuel will have evaporated while the unit was not in use leaving a film behind. This residue will plug and interfere with the fuel passages and metering orifices of the carburetor. If the unit runs with the choke on it is likely the carburetor is dirty. Be running the engine the carburetor will possibly clean itself. Make sure you remove any old fuel from the machine and replace with fresh. Allow the unit to run for an extended length of time attempting to return the choke to the run position. If you are able to return the choke to the run position you are on the way of solving this problem. You may need to run it additional time to completely purge the residue.

Additives are available to clean the carburetor and as a last resort if running with fresh fuel doesn't' return the motor to normal you may try it. For best results after mixing and running with the additives leave the unit overnight which may help to remove the remaining residue.

The shelf life of gas containing ethanol is about 30 days. In the future it is best to run the unit dry leaving ot fuel in the carburetor.

All else fails you will need to have the unit serviced by a small engine service center.

Yamaha... | Answered on Nov 19, 2015


it seems to be the standard that the rating or model ??1000 or ??1500 or ??2500 or ??5000 or??5500 or ??6500 is the kv rating of the gen-set regardless of straight or inverter
so if yours is EF1000 it will be 1000 watts or 1 kv
remember that most electric drills are 1000 watt units so a unit this small is mostly good for lights, charging batteries, small compressors for tyres

Yamaha... | Answered on Jul 04, 2015


Never heard of refrig working this way; all that know are closed systems that a person inside will suffocate.. What brand and model?

Yamaha... | Answered on Jun 01, 2015


If oily smoke is coming out of the muffler, then it is an indication that the rings are bad. Make sure that the oil is at the proper level.

Yamaha... | Answered on May 04, 2015


I own this generator and have the same problem. There is a design flaw that is likely the culprit. The engine uses a gravity fed fuel system. That's all well and good but that means the fuel must be above the highest point in the fuel line to feed properly. The easiest thing to do is completely fill your generator when you use it and it will die with 2-3 gallons of fuel remaining. If you want to fix the issue you will need to reroute the fuel line to be below the base of the tank for its entire length.

I have experimented with multiple fuel levels and fuel line configurations. I have also left the gas cap loose and removed fuel filter per recommendations from others. The base of the fuel tank on my unit is roughly 15.5 inches. The fuel valve is at 16.25 and the highest part of the fuel line is over 17! That simply will not feed fuel when the tank gets below 4 gallons and the generator will stall. Bad design by Ridgid on the fuel line routing. Only about a 30 minute fix though with some fuel line, cable ties and a small tool set.

Yamaha Ridgid... | Answered on Apr 08, 2015


The YAMAHA ET500 uses an NGK Spark Plug # B5ES 6410 or equivalent. I hope this is helpful.

Yamaha... | Answered on Mar 20, 2015


well first off you need to add a question .

Yamaha... | Answered on Mar 19, 2015


Most of these small generators hold a quart of two.

Yamaha... | Answered on Mar 02, 2015


Regardless of it being either a two or four cycle engine the piston rings are at fault, if not the cylinders having scratches or groves

Yamaha... | Answered on Feb 22, 2015


Coil, points, spark plug, shorted switch, or the switch being left on the stop mode

Yamaha... | Answered on Feb 22, 2015


By reversing the polarity you could have burned out the the stater motor. Or if is fused it is blown out.

Yamaha... | Answered on Feb 22, 2015

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