- Wattage (Gas): 5,500 W / 4,500 W
- THD: < 7%
- Noise Level: 74.1 dBA
- Fuel Type: Gasoline
- RV Ready: No
- Run Time@ 25% load: Unspecified
- Run Time@ 50% load: 13.5 h
- Weight: 216.1 lbs
Table Of Contents
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The 358 cc Yamaha MZ360 OHV 4-stroke engine on the Yamaha EF5500D runs on gasoline and can put out 120/240V. It has a running power of 4,500W and a maximum power of 5,500W. This generator has a noise level of 74.1 dBA, which is just a little louder than a vacuum cleaner. It starts up with a traditional pull-start mechanism. With a full tank, the EF5500D can run for about 13.5 hours at 0.5 load if it has 6.9 gallons of fuel (fuel consumption is approximately 0.51 GPH). Since the EF5500D has a THD of about 7%, it is best not to use it to power electronics that are sensitive to noise.
There are 6 AC outlets on the control panel: two 120V 20A (5-20R) GFCI duplexes, a 120V 30A (L5-30R) receptacle, and a 120/240V 30A (L14-30R) receptacle.Even though this Yamaha generator isn’t RV Ready, an L5-30P to TT-30R adapter can be used to connect it to a simple RV.The EF5500D is also ready for a transfer switch because it has a twist-lock L14-30R receptacle.If the power goes out, you can easily connect it to a breaker box and keep your home running.
The EF5500D’s status and activity can be tracked with the help of a digital data center.This part of the control panel shows information about the voltage and the number of hours it has been running.In addition to this information, there is a light that lets you know when the oil level is too low.A built-in fuel gauge makes it easy and quick to check how much gas is in the generator.In terms of safety, the generator can be used without worry because it has a circuit breaker for overheating and an automatic shut-off when the oil level gets too low ( Oil Watch system).The Oil Watch warning system from Yamaha gives you more peace of mind.This feature makes the car last longer because it keeps the engine from getting damaged and needing expensive repairs.When the oil gets low, the generator turns off by itself and won’t start again until more oil is added.It also has a sensor for carbon monoxide.This sensor is meant to measure the amount of carbon monoxide in the air while the generator is running.If the generator isn’t set up right and carbon monoxide levels get too high, the generator will turn off by itself.It’s a nice extra safety measure, but don’t forget to take your generator outside at all times.Yamaha packed the EF5500D with the usual paperwork and owner’s manual to get you up and running quickly, as well as a tool kit.
The Yamaha EF5500D is 29.1 inches long, 29 inches wide, and 31.5 inches high.Together with its traditional, open-frame design, they support the generator and allow it to be raised above the ground.This type of design is great for tough environments and heavy outdoor use.Even though this device is technically portable (meaning it can be moved), it can be hard to move and use it without special tools because it weighs 216.1 pounds.Still, the generator is easy to move once it’s on the ground, thanks to its wheel kit and folding handle, which is a good way to make up for its lack of maneuverability.The device also has a lift hook on the top of its frame, which makes loading, unloading, and moving the generator safer.
The following charts show how some of the most important features of the Yamaha-EF5500D compare to other generators with the same power output.
**Fuel efficiency is give in relative percentage, 0 being the lowest and 1 being the highest value. Please see below specification table for actual value.
|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 Regulator
|1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
|Lifetime run hours and voltage
|Metal, 6.9 gal
|Approx. dimen. (L x W x H)
|29.1 x 29 x 31.5 in
|Noise (lower limit)
|Low oil and overload protection, CO monitoring
|Tool kit and wheel kit
- We compared more than 500 portable generators at 50% load. We found that there is “skewed right” distribution for the difference between 50% load and 25% load and the median comes at 1.43. With this number we converter all the 25% load runtime to 50% load. Same with the propane efficiency, where median is 1.38.
- For some generators where propane runtime was not given, we used NIST 1994 GGE (Gasoline Gallon Equivalent) formula: 5.66 lbs. of propane = 1 gal of gasoline. All propane runtime is for 20 lbs. propane tank (4.7 gallons).
- Unlike many other sites, we actually tried to find out information about each of the above requirements. However, we are human and are therefore capable of the odd oversight or mistake. Please let us know if you spot any missing or erroneous values so that we can fix them.
About the Manufacturer
The Japanese-based Yamaha Corporation, established in 1887, has a lengthy history spanning more than 130 years and has a hand in just about every sector imaginable, most notably motorbikes, musical instruments, and electronics.Many of the best portable generators are among the company’s diverse offering of goods.Many of the more recent versions, it has been said, are built in China rather than Japan.
There is a warranty on the Yamaha EF5500D for up to 3 years.This warranty may not cover all parts of the generator or may only cover certain parts.Yamaha’s warranty policies can tell you more about how long the warranty on a Yamaha generator lasts.You can also call their customer service line at 1-800-962-7926.