Question on Yamaha generators

The Yamaha 2400 series generators use the same sized engine as the 2800W, and the 3000W generators. It uses an aluminum block, and is 1/2 the weight of the 3000W model.

The EF2400iS can be paralleled. The newer EF2400iSHC cannot, but is designed to start bigger loads. In theory, no need to parallel, saving the cost of a second generator.

The EF2400iS was designed to start "most" 13,500 BTU A/C units by itself. I bought mine a decade ago, and it's been worth every penny I paid.

You can see the testing I've done with mine here: http://www.2manytoyz.com/yamaha2400.html

Like pianotuna we also went with the Yamaha 3000 iSEB. The downside is it is heavier but it will easily run our AC and it doesn't rev as high as some of the smaller units. We leave it in the rear of our truck that has a topper so one can hardly hear it run.

The 2400 has a larger fuel tank and bigger motor. The fly wheel will be more massive.

Be aware that the 2400 can't be run in parallel mode.

I went to the Yamaha 3000 sIEB. I love the electric start and the 500 watts of surge.

Yamaha 2000 = 1600 watts continuous
Yamaha 2400 = 2000 watts continuous
25 percent more power for a motor that is twice the size?

Comparing the spec, the 2000W generator is actually rated 1600W constant.
It has 79 cc engine, while 2400 generator has 171 cc engine.
It is what it is, but the bigger generator not only gives you 50% more output, but very likely much bigger engine can handle surges much better.