Zoom on the Yamaha EF5500D
In summary, the Yamaha EF5500D is a portable generator especially useful for:
- RV travellers who wish to upgrade their experience to another level
- People occasionally participating in outdoor fairs, festivals or events
- Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
- Professionals who want to be able to deliver results, even during a power failure
In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.
Power & Run Time
The Yamaha EF5500D houses a 358 cc Yamaha MZ360 OHV 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 4,500W along with a peak wattage of 5,500W.
The generator is rated for a noise of 74.1 dBA (just slightly more noisy than a vacuum cleaner). Its starting mechanism is based on a conventional pull-start mechanism.
The fuel capacity of 6.9 gallons allows the EF5500D to operate for around 13.5 hours at 50% load with a full tank (fuel consumption around 0.51 GPH).
Since the EF5500D has a somewhat high THD (<7%), it is advisable to not use it for the powering of sensitive electronic devices.
The control panel provides the upcoming 6 AC outlets:
While this Yamaha generator is not RV Ready, its L5-30R receptacle can be used for a simple RV connection with an L5-30P to TT-30R adaptor. Besides, due to the featured twist-lock L14-30R receptacle, the EF5500D is transfer switch ready: you may connect it to a breaker box to power your household during a power outage.
The dimensions of the Yamaha EF5500D, which are L29.1 x W29 x H31.5 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. This type of design is ideal for tough environments and heavy outdoor use.
Even though this device may be technically portable (as in movable), manipulation and transportation without special equipment can be a challenge, as it weighs 216.1 pounds. Still, once it is on the ground, its wheel kit and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.
In addition, the device is equipped with a lift hook on the top of its frame, which provides extra safety during the loading, unloading and transport of the generator.
One of the many EF5500D's features is the data center, included in its control panel, which conveniently provides information on the lifetime run hours and voltage and thus, helps you monitor its activity and status.
In addition to this info, when its oil levels are insufficient, you will be informed by the featured light indicator.
A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the generator.
As for its security measures, the device features an overload protection (circuit breaker) and an automatic low oil shut-off (Oil Watch system), letting you use it with a peace of mind.
Yamaha's Oil Watch warning system gives you an extra peace of mind. This feature enhances long-term durability by preventing engine damage and costly repairs. Once the oil begins to run low, the generator automatically shuts off and cannot be re-started until oil is added.
It also includes a carbon monoxide sensor. This sensor is designed to monitor the level of carbon monoxide present during the generator's operation. If the generator is positioned incorrectly and carbon monoxide levels rise to an unsafe level, the generator will automatically shut down.
Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Yamaha also included a tool kit in the EF5500D's packaging.
The Yamaha EF5500D is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.
Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.
The Yamaha EF5500D versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Yamaha EF5500D compare to generators of similar power (between 4000 and 5000 W).
- Considering its dry weight of 216.1 pounds, the Yamaha EF5500D is one of the heavier generators producing between 4000 and 5000 running watts. In terms of weight, one of the champions in their power range is the WEN 56477i, standing at just 72.7 lbs.
- If compared to generators capable of producing a similar running wattage, this generator with a lowest emitted noise of 74.1 dBA can be considered somewhat noisy. If noise emissions are important to you, one of the least noisy generators of this power range is the Yamaha EF4500iSE with only 58 dBA.
- As the EF5500D features an autonomy of around 13.5 hours at 50% load, it has a higher run time than an average generator of its power range. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the NorthStar c5500, which is able to run for around 15.1 hours.
- Even though run times are undoubtedly important, they are dependent on the fuel capacity to a large extent. For a more wholesome picture, we must take into consideration the fuel consumption of the generator. This generator is not fuel efficient compared to devices of similar output: its estimated fuel consumption stands at 0.51 GPH at a 50% load. If you wish to acquire one of the most gasoline efficient products of this power range, the WEN 56477i, with a fuel consumption of 0.27 GPH could be in your good books.
As you can see from these interactive charts, when compared to other 4000-5000W generators, the Yamaha EF5500D is on the average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- CO Sensor
- GFCI Outlets
- High run time
- No electric start
- On the heavy side (216.1 lbs)
- On the noisy side (74.1 dBA)
- Low fuel efficiency
Features and Specifications
|358 cc Yamaha MZ360 OHV 4-stroke
|AC: 120/240V 60 Hz
|Running amps (@120/240V)
|Peak amps (@120/240V)
|Run time @50% load
|Run time @25% load
|Automatic Voltage Regulation
|Lifetime run hours and voltage
|Metal, 6.9 gal
|Approx. dimensions (L x W x H)
|29.1 x 29 x 31.5 in
|Noise (lower limit)
|Low oil and overload protection, CO monitoring
|Bonded to frame
|Tool kit and wheel kit
|Country of origin
|Other model numbers
Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.
With a rich history of over 130 years, the Japanese based Yamaha Corporation, founded in 1887, has tipped its fingers in every industry imaginable, most notably motorcycles, musical instruments and electronics. The company boasts with a wide range of products, including many of the top rated portable generators. However, many of their models are made in China, rather than Japan.
The Yamaha EF5500D is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Yamaha generators, please consult Yamaha's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-962-7926.
Questions & Answers
What can it power?
|Sump pump (1/2 hp)
|Furnace fan (1/2 hp)
|Refrigerator (energy star)
|Pair of small speakers
Couldn't find the right answer for you? Ask your own question.