1000 watt Yamaha generator surges when on low setting

no
ac units are 2000 watts minimum, washing machines are 1500 watts minimum, microwave is what is on the plate and start at 650 watts but most are 2000 watts
the 2400 is the peak out put for start up of fridge , washer etc and the running wattage will be 2000 watts or less ( duty cycle )
to run more than one of the nominated items at once you will be needing a 5500 to-6500 watts unit
they handle a start up surge of 6500 watts ( larger one) and will comfortably handle 5500 watts run full load
it works like this , the plate on the gen set is the surge short time load capacity of the genset and not the duty load which is 500 to 750 watts less than that plate wattage
for example your 2400 is is surge rated at 2400 watts but duty load is less than the 2000 watts
many people make the mistake of buying a gen set that looks big enough but do not calculate the maximum load capable on being put on the gen set
fully loaded uses more fuel /hr
wears out faster
has power surges as the extra load cuts in and the motor struggles to get back to required rpms for voltage and cycles
will not cover extras like lights ,
a much large gen set will take it all in it's stride , no power surges, better economy, less stress
talk with an electrician , do your maths on everything you wish to run and that which you forgot about then add 1000 watts to the duty cycle and that will be close to the gen set you require

it seems to be the standard that the rating or model ??1000 or ??1500 or ??2500 or ??5000 or??5500 or ??6500 is the kv rating of the gen-set regardless of straight or inverter
so if yours is EF1000 it will be 1000 watts or 1 kv
remember that most electric drills are 1000 watt units so a unit this small is mostly good for lights, charging batteries, small compressors for tyres

If the unit is older it could have heavy carbon in the cylinder heads, it could be a ring sticking and binding, do a compression test. Compression is high or mechanical binding.

I hope you have not moved the genny from lower to high altitude b cause the carbs of these gen sets are tuned at the sea level and they give their best performence up to 1000 meters or so in altitude from sea level if you hav'nt moved the generator then check the air fuel mix screw on the carb that screw controls the the oxygen supply required inside to burn the appropriate quantity of fuel take a screw driver and adjust by rotating it anticlockwise on idle with eco switch on then put it on 75%load and try adjusting the screw both ways clockwise and anticlockwise with switching the load on and off with eco throttle off you will find a point where the engine will run smooth but mind it the screw has to be moved very slowly either side usualy these problems accur on high altitudes when the oxygen suppy goes less then the jet in the carb is to be reduced and air fuel mix has to be adjusted which is called re jetting of the carb You say you have cleaned the carb may be accidently while cleaning the air fuel mix screw might got disturbed just check

Inverter Generator Benefits

• The EU3000 series generators are inverter generators. The generator features an alternator, which produced high-voltage, multi-phase AC power. This power is converted to DC power and then converted back to AC. This process is controlled by a microprocessor and is necessary to provide stable, consistent power capable of running equipment sensitive to power surges. This type of generator provides higher fuel efficiency and lower operational noise ratings in a lighter model than home and work generators produced by Honda.
  

EU3000i Handi Specifications

• The Honda EU3000i Handi is a 3,000-watt inverter generator that features wheels, folding handle and a recessed convenience light. The engine is a Honda GX160, which features a 163-cc displacement. The AC output is 120 volts, with an average rating of 2,600 watts and a maximum production of 3,000 watts. There are three receptacles to include a 20A, 125-volt duplex and a 30A, 125-volt locking plug. The DC output is 12 volts and 100 watts. The EU3000i can hold 1.56 gallons of unleaded fuel, which will provide consumers with 3.6 hours of run time at 25 percent load for 7.7 hours.
  

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Hello, I have the same exact generator, 2400 Yamaha. It works fine for my Ac, and then some. After it first kicks on, is the biggest surge. Then I have even after ac is running, I have had tv on and even used microwave. But as far as running you ac on your rv , not problem. I do it all the time. Mine is ulta quite, and 8 to ten hours run time on about a gallon of fuel. Mike

Each one of your heaters draws 1500 watts on HIGH & 900 watts on LOW. Obviously, your generator can not operate all three on HIGH. On low, all three would require 2700 watts of your generators power. Which leaves very little to operate any other electrical appliances in your home. Becasue these are electric ceramic heaters, there is no surge to them, when you turn tum ON. The wattage listed above, is continual wattage, when they are in use. There has to be an electrical motor involved to have start up surge (i.e Refrigerator, freezer, etc)

So, just operating what you described, will not use up all of your generator's power. You should have just under 1500 watts left over. Of course, if you used a battery operated radio, you could gain 25 additional watts of power.

I hope this helped you and thanks for choosing FixYa.

First thing to monitor is the fuel solenoid power. See if it is the thing that goess away to cause shutdown.

Tracing this back there is only a few things that control this: The battery, the low oil shutdown switch, and the run switch, and associated wiring.

If I were to ventture a guess, I would put money on the low oil shutdown switch.

The carburetor is probably clogged up. Mix a bottle of carburetor cleaner with the gas to see if that would help. Also check/replace the fuel filter.