Problems With Yamaha EF2400iS Inverter Generator (Solutions Included!)

We are looking at the Yamaha EF2400iS. This is one of the models you can choose when it comes to inverter generators. It is essential that you are aware of the common Yamaha EF2400iS problems. That is the core of our discussion; kindly read on.

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What Is The Yamaha EF2400iS?

The Yamaha EF2400iS is a 2.4 kVA inverter generator that runs on petrol. The Yamaha EF2400iS is commonly used for motor homes and caravans, amongst others. It is preferred for its compactness. Plus it delivers the greatest output in the 2 kVA category. Let us look at the common Yamaha EF2400iS problems you must be wary of:

Yamaha EF2400iS Problems

Yamaha EF2400iS problems will vary from user to user. This will depend on frequency of use. It will also depend on quality of use. Thus the intensity and how often problems arise is contextual. Regardless, these are the common problems which occur for the Yamaha EF2400iS:

1. Engine Is Not Starting

This is obviously a common problem that the Yamaha EF2400iS may experience. In most cases it is basic to detect where the issue could be coming from. Here are some causes of this problem:

  • Fuel line may be clogged.
  • Carburettor may be clogged.
  • Fuel may have run out.
  • Engine oil level may be too low.
  • Spark plugs may be faulty or worn out.
  • Piston, cylinder, or gasket may be worn out or faulty.

Troubleshooting Engine Not Starting Problem

When the Yamaha EF2400iS does not start, conduct several checks. You have to be sure what the cause is because the possibilities are many. Some of the common solutions to consider are:

  • Cleaning components such as fuel lines and the carburettor.
  • Ensure fuel is adequate and that it is the right one and clean.
  • Top up or replace engine oil where needs be.
  • Fix spark plugs or replace them.
  • Fix or replace piston, cylinder or gasket.

2. Generator Runs And Abruptly Shuts Off

A number of Yamaha EF2400iS owners may encounter this problem. The Yamaha EF2400iS can start and even run for a while then it just shuts off. When trying to switch it on again it may refuse. It will only start again after a while after which it will abruptly shut off again. Possible causes of this problem are:

  • Spark plugs may be faulty.
  • Oil may be dirty or inadequate.
  • Carburettor may be damaged or worn out.
  • Fuel line could be leaking or blocked.

Troubleshooting Generator Running And Abruptly Shutting Off Problem

This problem is often related to the fuel systems. Thus you have to thoroughly check the many components making up the fuel system. Once you have narrowed down the possible causes you can do the following:

  • Fix or replace spark plugs.
  • Top up oil or replace it altogether.
  • Clean, fix, or replace carburettor.
  • Ensure fuel does not settle for too long inside the generator; it can become stale.
  • Plug, clean, unblock, or replace fuel line.

3. Generator Appears Overloaded When It Should Not Be

This is a common issue with the Yamaha EF2400iS. Most users cite the Yamaha EF2400iS appearing overloaded yet there will be light items connected. Some report the generator appearing overloaded just seconds after turning it on. This could be caused by:

  • Fuel may be stale or contaminated in general.
  • Carburettor may be dirty or faulty.
  • Items connected may indeed be overloading it.
  • Spring may be aligned wrongly.

Troubleshooting Appearing Overloaded When It Should Not Be Problem

You have to make some checks to be sure. The possible solutions are:

  • Ascertaining connected items are not overloading it.
  • Replace old fuel.
  • Cleaning or replacing carburettor.
  • Get spring adjusted rightly; preferably by a qualified service agent.

4. Generator Only Runs On Choke

If you own a Yamaha EF2400iS you will most likely at some point experience this problem. Most users cite this problem where if the choke is off, the generator will not run. This can be caused by:

  • Carburettor may be dirty, damaged, or faulty.
  • Idle and or main jet may be clogged.
  • Gasket may be leaking.

Troubleshooting Generator Running Only On Choke

This problem is mainly on the fuel system or some part of it. Inspect and figure out the root cause. You can then:

  • Clean the carburettor or replace it.
  • Clean the jets.
  • Fix, clean, or replace gasket.

5. Generator Too Noisy

The Yamaha EF2400iS is designed for quite operation. The moment it is too loud, something is wrong. Possible causes of this are:

  • Carburettor could be unclean.
  • Generator could be overloaded.
  • Fuel type could be inadequate or incorrect.
  • Loose connections or fittings.
  • Damaged cables

Troubleshooting Generator Too Noisy Problem

So many things can cause your Yamaha EF2400iS to be too loud. Make sure you exhaust all the possible causes. Solutions to explore are as follows:

  • Clean the carburettor.
  • Replace or top up fuel.
  • Use the right fuel.
  • Do not let fuel settle for too long in the generator when not in use.
  • Ensure things like bolts, nuts; belts, pulleys, and such like are properly in place.
  • Replace any worn out components e.g. cables, capacitors, vacuum, and so on.

How To Avoid Yamaha EF2400iS Problems

Avoiding Yamaha EF2400iS problems is a function of how you use and handle your generator. You have to use it rightly as stipulated in the user manual. Use the right products e.g. fuel and oils. Get your Yamaha EF2400iS serviced as per schedule. Regularly inspect it before and after any time you use it. Regularly clean it too. Keep it in an appropriate environment away from adverse conditions e.g. harsh weather. Do not run it for non-stop periods that are too long. Put together all these approaches will avoid Yamaha EF2400iS problems.

What kind of gas or fuel does the Yamaha EF2400iS run on?

The Yamaha EF2400iS runs on unleaded fuel; that is petrol in this case. The Yamaha EF2400iS’ fuel tank has a capacity of 6 liters. That is enough to run for roughly 9 hours on a quarter load.

How Long Do Yamaha Generators Last?

Generally it is anything between 2000 and 3000 hours of operation. That translates to between 10 and 20 years of operation. However, this is heavily dependent on ensuring you do servicing and maintenance for your generator regularly.


All in all the Yamaha EF2400iS is a convenient, compact generator to use. You just have to build a culture of responsible use. You then couple that with having it serviced consistently. That will be enough to guarantee smooth operation for the long haul.