7 Suzuki 300 Outboard Problems You Should Know (Explained)

With over 50 years of experience making outboards, Suzuki has positioned itself as a leader worldwide. They have a strong reputation in the industry, and the Suzuki 300 Outboard meets and exceeds expectations.

The Suzuki 300 Outboard utilizes the latest technology and the best materials making this Outboard reliable and durable.

This Outboard is considered the ultimate of all 4-stroke outboards. Suzuki Motors Company does not compromise when building outboards and still provide them at affordable prices.

This article delivers you the most common problems you may find with the Suzuki 300 Outboard.

We will discuss the problems in depth and give you some solutions in case you run into them with your Suzuki 300 Outboard.

Check also our list of problems with Suzuki 200 outboards 

1) Struggles with Acceleration

There have been some owners that have expressed concern about how well the Suzuki 300 Outboard performs at a high RPM.

The engine really seems to struggle at the higher end of RPMs. There have also been experiences with difficulty starting the engine.


2) Intermittent Power Loss

There have been some reports of power loss. This loss of power usually occurs in the Suzuki 300 Outboard when there is another part that is clogged, broken, or defective. It is often a sign that you should thoroughly check the Outboard.

Other reports have shown that the Suzuki 300 Outboard has an intermittent running problem when above 3,500 RPM. At this RPM, the Outboard sputters, loses RPM, or just stops.

The motor seems starved for fuel and is burning more fuel than it should. At this point, throttling back on the RPMs allows the Outboard to continue to run as long as you stay at the lower operating RPM.

This is an inconsistent problem. The Outboard runs perfectly fine, and then suddenly, this problem occurs, and it remains an issue for the rest of the day.

The problem could be with the fuel line. It seems to happen with any type of fuel line, even the newer type of fuel line that is collapsing.

The inner liner of the fuel line breaks from the outside and then collapses. The difficulty comes in because this defect is difficult to see because the outer shell of the line does not show any damage.

3) Vibration in the Engine

Boat owners have consistently discussed the significant vibration the find in the Suzuki 300 Outboard 4 stroke engine. A bad propeller most often causes this vibration. The propeller may be damaged, loose, or obstructed.

If you begin to feel a stronger vibration of the engine when you reach a higher RPM, it could be a sign that it is a problem with the propeller. When the engine increases RPM, the propeller speed increases. If it is damaged in some way, it could cause unbalanced propulsion and vibration.

You should look at the propeller to see if there is any damage or if it is bent. When the propeller is restricted, it is not able to turn properly. This can cause a vibration.

The propeller can be restricted when seaweed or fishing line gets tangled in it. This can happen when you travel in water that is not deep.

If you find yourself in these conditions, you should inspect your propeller regularly. If it is not damaged or tangled in something, it could be loose.

If it is loose, you can tighten the mounting bolt or steering pivot. However, there is a possibility that there is severe damage. If you see any indication of damage, such as the misalignment of the shaft, you should take your Suzuki 300 Outboard to a professional for repair.

4) Outboard Corrosion

There are many owners’ reports that indicate one of the most prevalent problems with the Suzuki 300 Outboard is corrosion.

When you have a problem with your engine consistently and constantly stalling in neutral and then failing to idle, this is a sign that there could be corrosion. Typically, corrosion results from the engine mount deteriorating, which then causes the engine to rust.

When your engine is rusting, it is a significant problem because it can then begin to damage your boat trimming. A rusting engine can also cause problems with the position of your engine mounting.

There have been some cases where the corrosion is caused because the exhaust is being hampered. This is a result of a bad design. It ultimately leads to leaks in the exhaust, which also can corrode the engine.

The hose clamp is another place where you may find corrosion. It would be best if you inspected this area. A good rule of thumb is that after every other trip you make, you should take off the outboard hood. You want to wait until the engine cools before you take this step.

Once the engine is cool enough and you remove the hood, you should apply a thin film of silicone spray on the powerhead. You want to carefully choose your silicone spray because some can cause damage to the plastic.

Another thing to consider when trying to protect your Suzuki 300 Outboard engine from corrosion is not to allow it to be directly exposed to UV rays. UV rays can degrade rubber and plastic. If it is not possible for you to store it out of the sun, then cover the engine with a UV resistant fabric.

5) Motor Does Not Start

There have been reports by owners that their Suzuki 300 Outboard does not start. The primer bulb could be the cause of this.

If the primer bulb does not cause resistance, then there is no fuel entering the engine. If no fuel gets to the engine, it is not able to start.

You should inspect the primer bulb to see if there is any damage or blockage. If this is the case, you may need to replace the primer bulb and the entire fuel line.

6) Problems with Spark Plugs

Some owners have reported a sudden loss of power with their Suzuki 300 Outboard. This could be an indication that there is a problem with the spark plugs.

When you experience a sudden loss of power at full throttle, it could be related to the spark plugs. Therefore, you should check the filter and spark plugs to see if there is a problem.

It could be as simple as the spark plugs just need to be cleaned. However, they could also require a replacement. You may also have gotten water in the fuel filter.

You can easily clean or replace the spark plugs and filter. You can also check to see if there are any problems with the actual fuel line.

7) Rough Idle

Some boat owners have commented their Suzuki 300 Outboard does not run as smoothly as they would like when they are traveling at lower RPMs. This roughness seems to occur around 1550 to 1900 RPMs.

It is often so rough that they are not able to steer the boat while it is idling. This could be caused by a bad thermostat or when the cylinder is not connected properly to the plugs.

This is not a simple fix that you can address on your own. It would be best if you had a professional assess the problem with your Outboard. It could be an injector or dysfunctional cylinder problem. In most cases, either of these will be a replacement.

General Pros and Con for Suzuki 300 Outboard


The Suzuki 300 Outboard is the first in the world to incorporate Suzuki Selective Rotation System. This combines standard and counter-rotation operations in the same unit.

Suzuki utilizes the best technology in its lean burn system, which constantly corrects the oxygen to gas ratio for optimal combustion.

The 300 is a mid-range and affordable Outboard that provides ultimate performance.


  • The Suzuki 300 Outboard engine has significant vibration issues.
  • The Outboard commonly corrodes.
  • It struggles with acceleration and a higher RPM.




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