Most Common Problems With Yamaha F250 Outboard

The state-of-the-art Yamaha F250 with unrivalled powerful power performance ensures that you have a muscular and smart engine to handle the most extreme offshore environments. 

It weighs just 253 kgs and has a new generation 4.2 litre fuel facility. As well as this the F250 engine has the most power in the big-bore V6 offshore outboard class. 

The fantastic power-to-weight ratio of the aforementioned F250 engine has been achieved through the use of a modern plasma-fused sleeveless cylinder design. 

As a result, it achieves increased engine power as well as greatly reduces the weight of the overall cylinder. Unimaginable innovations surrounding Yamaha’s F250 do not stop there. 

This exceptional outboard engine incorporates all of Yamaha’s latest technologies, including electronically controlled variable camshaft timing, throttle valves and digital electronic controls.

In this article, we will discuss some common problems of the Yamaha F250 Outboard engine and then provide possible solutions. So let’s get started.

Most Common Problems of the Yamaha F250 Outboard:

Yamaha has been satisfying consumers with its outboard engine service since the ’70s. But its 4-stroke engines have caused a stir in the outboard motor world. 

With the blessings of state-of-the-art technology from Yamaha Manufacturing Company, you can use the engine to run freely in the harshest environments.

So, let’s talk about the problems of the Yamaha F250 outboard engine and find out the solution.

1. Not Turning Over or Not Engaging

All systems on the Yamaha 250 outboard are operated electrically. This is why a common problem with this engine is that the boat is not involved enough.

If you run at low RPM then the engine will feel rough. Low RPM can usually range from 800 to 1900. Your boat may not be running in this problem. You will notice that the starter is involved but the boat is not starting. 

When you go to start the boat, that is, when you hold the key, the engine turns a few times and stops. The boat is not starting.


This problem may be due to a faulty electrical system. If the main fuse blows, there is a possibility of not engaging.

Also, if your boat’s battery is damaged in any way, you will not be engaged. For example, both ends of the cable connected to the battery may become. 

Or a bad battery switch or a bad wire could also be responsible for not engaging. If the voltage of your boat battery is less than 12V then you must understand that your battery is bad.

Possible Solution

  • If your Yamaha F250 outboard is experiencing a Knot Engage problem, check the main fuse first. If the fuse blows, replace it with a new one.
  • If your boat’s battery is damaged, replace the battery if possible. If there is a problem with the battery connection or the wire or switch, tighten the connection and replace the wire and switch.

2. Engine Does Not Start, Maybe Died

If you suspect that your boat’s engine is dead, you must first check the amount of fuel. Check the fuel tank for this.

If you see that there is no fuel problem, that is, the engine is full of fuel, look at the fuel lines. The most common problem with fuel lines is leakage. 

If you feel a hard starting engine, you can be sure that the fuel lines have leaked. Other causes include leakage of fuel lines, such as the smell of fuel or leakage of fuel. Lack of pressure in the fuel pump can cause a faulty fuel connection. 

Also if the spark plug goes bad then the engine acceleration decreases, there is a problem to start the engine or the engine power decreases. If the engine’s primer bulb is bad, the engine may lose its prime or run out of fuel quickly.


Now the question is what is the cause of these problems? Why is your engine not running or is it dead?

The mentioned problem can occur if there is a fault in the fuel line connecting the fuel tank to the motor. In addition, if your boat’s fuel connections are damaged, this problem can occur. 

If the fuel connection is damaged, the flow to the fuel tank decreases. The general level of engine oil is between the L and H marks. However, if the engine oil is above H or below L, then the main problem will occur. 

In addition, if the spark plug burns or bursts and the primer bulb bursts or breaks, your engine will not start.

Possible Solution

  • Since the main problem surrounding the faulty fuel line is to replace the entire fuel line.
  • If the fuel connections are damaged, inspect them carefully and replace them as needed.
  • Engine oil should always be kept at the correct level. So be sure of this.
  • Replace broken primer bulb and defective spark plug.

3. Excessive Vibration 

There are times when you are running your Yamaha F250 Outboard motor at normal speed but you are feeling much more vibration than usual. 

But even with normal speed, if the problem is serious, you will feel extra vibrations even at a low speed. They have complained that this issue is very annoying to most of the drivers.


Now if you ask why you feel extra vibration in your boat, the first reason behind it is a faulty propeller. When the propeller blades become unbalanced or bent, vibrations occur during rotation. 

Also if your boat motor is not mounted properly then the engine will vibrate and vibrate while running. Improper mounting means that the screws or bolts you attach to the motor are loose.

Possible Solution

  • If the propeller’s grade is inconsistent or crooked, fix it.
  • If there is a problem with the propeller internally, try to solve it with the help of a skilled mechanic. Replace as needed.
  • Do you still have problems after fixing the above issues? Mount the motor properly then.


One of the highlights of the Yamaha 250 Outboard 4-Stroke Outboard is its robust performance. Besides, it is incredibly durable and light. On top of that, Yamaha’s state-of-the-art technology provides the best performance in the engine.

The engine also offers the best in terms of cost. In the consumer society, the engine is preferred for the price within reach. Moreover, it is not burdened with many major or common problems.

So finally if you want to know our final verdict, we would say, go for the Yamaha F250 Outboard engine if you want a good 4-stroke 250 horsepower.

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