Yamaha EF55DEZ1 Portable Generator 5,500 Peak/4,500 Rated Watts Electric Start 120/240V
$666.00
The Yamaha EF55DEZ1 is a 5,500W portable generator with electric start and dual voltage output, built for dependable home backup and job site use. It combines Yamaha engine reliability with safety features like CO shutdown and rugged construction for long-term performance.
In Stock
Description
Yamaha EF55DEZ1 Portable Generator 5,500 Peak / 4,500 Rated Watts (Electric Start, 120/240V)
Description: Heavy-duty Yamaha portable generator with MZ360 engine, electric start, CO sensor safety system, and dual 120/240V output for home backup and job site use.
The Yamaha EF55DEZ1 is a commercial-grade portable generator designed for reliable home backup power, construction use, and emergency applications. It delivers up to 5,500 peak watts and 4,500 rated watts, providing stable electricity for essential appliances, power tools, lighting systems, and small HVAC loads.
Powered by Yamaha’s durable MZ360 357cc OHV engine, this model is engineered for long service life, fuel efficiency, and consistent performance under load. It features electric start for easy operation, along with Yamaha’s well-known reliability systems such as automatic low-oil shutdown and overload protection.
Unlike inverter models, the EF55DEZ1 is a conventional open-frame generator, meaning it prioritizes raw power output and job-site durability. It also supports 120/240V dual voltage output, making it suitable for both residential backup circuits and contractor equipment.
A notable upgrade in this model line is the inclusion of a CO (carbon monoxide) sensor shutdown system, which improves safety during operation in enclosed or semi-enclosed environments.
Key Features
- 5,500 peak / 4,500 rated watts reliable output
- Electric start for easy operation
- Yamaha MZ360 industrial-grade engine
- 120/240V dual voltage for flexible use
- Built-in CO sensor shutdown safety system
- Designed for job sites and home backup
- Heavy-duty steel frame for durability
- Large fuel tank for extended runtime
- Low oil shutdown + overload protection
- Portable design with wheel kit
Applications
- Home emergency backup power
- Construction and contractor job sites
- Power tools and equipment operation
- Lighting and small HVAC systems
- Rural and off-grid power needs
| Specification | Details |
|---|---|
| Brand | Yamaha |
| Model | EF55DEZ1 |
| Type | Portable Open-Frame Generator |
| Engine | Yamaha MZ360 OHV 4-Stroke |
| Displacement | 357cc |
| Peak Power | 5,500W |
| Rated Power | 4,500W |
| Voltage Output | 120 / 240V |
| Frequency | 60 Hz |
| Starting System | Electric Start + Recoil Backup |
| Fuel Type | Gasoline |
| Fuel Tank Capacity | ~6.9 gallons (26 L) |
| Runtime | ~7–9 hours (depending load) |
| Noise Level | ~74 dBA |
| Outlets Multiple | 120V + 120/240V twist-lock outlets |
| Protection System | Low oil shutdown, overload protection, CO sensor |
| Frame Type | Heavy-duty steel frame |
| Mobility | Wheel kit + folding handles |
| Compliance | CARB & EPA compliant |
| Weight | ~238 lbs (approx.) |


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