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Yamaha EF6300iSDE 6300 Watt Generator with CO Sensor

EF6300iSDE, EF6300IS
Customer Reviews

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  • Free Shipping Type
  • Yamaha Standard Warranty
  • Add a Yamaha Extended Warranty
Price: $4,229.00

   Current Availability: In Stock - Orders Received by 2PM PST Ship Same Day
Product Code: EF6300ISDE

Description Specifications Shipping & Terms

THE ALL NEW EF6300iSDE with CO Sensor!

The Yamaha EF6300iSDE weighs 200 pounds, starts with ease with its electric starter, and is capable of running an RV air conditioner, microwave oven and more all at the same time. Designed to be acoustically sound, this extremely quiet generator (58-64 dBA) features Smart Throttle which allows greater fuel efficiency and noise reduction. It will run up to 19 hours at ¼ rated load on a tank of gas. With features such as Built-In Wheels, Electric Start, Power Meter and an Oil Watch Warning System, the EF6300iSDE is one of the most powerful well equipped portable inverters in its class!

We only sell Genuine Factory New Yamaha Generators


  • CO Sensor - Engine shuts off if a high level of carbon monoxide is detected
  • The EF6300iSDE produces a maximum of 6300 watts of pure clean power.
  • With sophisticated capabilities like dual 120-volt and 240- volt power, you can run almost any type of equipment with total confidence. From high-demand equipment such as power tools and RV air conditioners to sensitive electronics like LED TVs, satellite receivers and computers.
  • With its electric starting capability, the automatic choke makes for easy starting. The EF6300iSDE is ideal for outdoor recreation and power outage emergencies.
  • Excellent fuel efficiency means a run time of 13.3 hours at a constant 1/4 load on just a single tank of gas.
  • The EF6300iSDE features Noise Block sound reduction system which makes it a very quiet generator for its output; 58-64 decibels.
  • Yamaha’s Oil Watch Warning System helps prevent engine damage from low oil and provides added peace of mind.


  • Noise Block ‐ Quiet, pleasant to use.
  • Pure Sine Wave (Pulse Width Modulation) Inverter System ‐ Run electronic equipment, appliances, variable-speed power tools and computers.
  • Smart Throttle ‐ Automatically adjusts engine speed to match power demand, reduces noise, fuel consumption and engine wear.
  • Wireless Remote (Optional) ‐ Start & Stop the generator from up to 66 feet away.
  • Electric start ‐ Effortless starting (battery included).
  • Automatic choke ‐ Effortless starting.
  • Low oil shutoff ‐ Protects engine from low oil damage.
  • Fuel level gauge ‐ See fuel level at a glance.
  • Dual voltage 120/240 volt ‐ Versatile, operate variety of 120V and 240V tools and appliances.
  • Power meter ‐ See how much power is being used and how much power is available.
  • Hour meter ‐ Shows accumulated running time for refueling and service scheduling.
  • Lightweight ‐ Easy transport.
  • Twin bar ‐ Aid lift, transport and provide security point.
  • Stylish design ‐ Nice appearance and Modern design.
  • 50 state legal ‐ Meets CARB emission regulations and given highest EPA rating.


  • Powering Air Compressors
  • Powering Large Well Pumps
Inverter model generators will not operate to supply power to Air Compressors, or some Well Pumps due to the start up load. Talk to a Customer Service Rep for more details.

EF4500iSE and EF6300iSDE
Yamaha Versus the Competition - WHY YAMAHA?
Inverter or Generator? What is the difference?
How to choose the right size Generator.

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WP12-BS Battery Tender 021-0123

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 63 Write a review »

  0 of 0 people found the following review helpful:
4 of 5 Co2 sensor is awful July 28, 2022
Reviewer: G thompson from Elko, NV United States  
Love the generator when it’s working properly and running ., but the co2 sensor keeps shutting it off if the wind is blowing the exhaust right back at it and you know how wind can be. As long as you have the wind blowing it away  works just fine

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  0 of 0 people found the following review helpful:
5 of 5 Exactly What We Were Looking For! July 6, 2022
Reviewer: Rachel S. from Los Angeles, CA United States  
Great product and great customer service!  We look forward to working with our rep again.

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  1 of 1 people found the following review helpful:
5 of 5 Great Customer Service February 11, 2022
Reviewer: Victoria Zandonella from Bridgewater, CT United States  
Thanks to Larry for working with me the order and delivery process. Very glad to finally have my generator - delayed due to global supply chain issues for several months. However as soon as the items came in my experience was fast and easy through to delivery.

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  1 of 1 people found the following review helpful:
5 of 5 I have two of these generators September 6, 2020
Reviewer: Jeffrey Meyers from Baker, LA United States  
I purchased two of these inverter generators 11 years ago. The first one has remote start. These generators were purchased to provide power during a hurricane outage. I pulled both gens out two weeks ago for Hurricane Laura. Both fired up and run perfect under loads. These are dependable generators. I only run non ethanol premium fuel in each.  I replace the fuel with fresh fuel every year. The carbs are stored dry of fuel. I am on the third battery for each generator. I cannot store with the battery in the generator due to a parasitic drain that  empties the batteries in less than two months.  The two batteries are kept on a battery tender. Other than that, I highly recommend these generators especially if you have a low amperage 240 volt application.

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  1 of 1 people found the following review helpful:
5 of 5 Perfect transaction and delivery July 13, 2020
Reviewer: Paul King from Medford Lakes, NJ United States  
I initially ordered a generator from another vendor, only to find out that it was out-of-stock and wasn't shipping.

My order at National Supply was processed and shipped the same day, and it arrived within the cross-country shipping window provided (1 week).  My local driver assisted with a tailgate delivery and the contents arrived packed extremely well and in perfect condition.

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