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


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


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 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 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


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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