What Is A Yamaha Vst Filter

Your Yamaha outboard engine has a vapor separator tank side by side to the electric fuel pump.

The filter in VST treats the fuel before sending it to the next component in the system. Due to various reasons, it tin can get clogged and cause some issues.

In this article, I am going to talk virtually Yamaha VST filter symptoms and signs forth with possible solutions.

What Signs Should You Look for To Catch Faulty Yamaha VST Filter?

Due to the complex mechanism of the fuel line, you tin can't pinpoint a component for a specific problem.

Withal, let me tell yous when it is time to suspect that the VST filter is no working properly.

If you are having problem starting the engine or it starts bogging down, you volition need to inspect the health of the filter.

Now, that is ane obvious sign, and let me tell you some more than.

What Are the Symptoms of a Bad Yamaha VST Filter?

Here I am about to tell yous some existent-life experiences. It volition help you understand when you lot should cheque, make clean, or supplant the VST filter of your Yamaha outboard engine.

RPM Maxes Out at 4500 or Less

A clogged filter sends less fuel to the cylinders leading to low power output.

Lots of owners have experienced this trouble of having 4500 or less RPM fifty-fifty though they run the engine at its full speed.

I or More Cylinder Not Working

From VST, gas goes into the fuel injector and to the cylinders after that. When the filter gets clogged and not performing to its all-time, the amount of gas released from VST gets decreased.

As a result, the fuel injector tin't provide enough fuel to all of the cylinders. And, one or more pistons don't become the necessary gas to ignite and run the engine.

Not Starting at All

The in a higher place two situations happen when the VST filter is partially dirty. When information technology is completely blocked, the engine may not beginning at all.

How Should You lot React If You lot Detect A Bad Yamaha VST Filter?

You know the nature of a faulty VST filter of the Yamaha outboard engine. And it is time to accept some actions to solve it.

Bank check the Filters

Offset of all, buy a fuel pressure level judge which should cost you no more than 50 bucks.
Connect the gauge to the Schrader valve (tire stem). You volition find it on the fuel rail.
The next step is to take three dissimilar measurements; key on, idle, and 1500 RPM. Also, make certain to hook up the motor to water muffs before yous brainstorm.
If y'all see a reading of 40 PSI, you volition know that neither fuel pumps nor VST filters are clogged. Otherwise, follow the below procedures one by one and troubleshoot.

Remove and Make clean

It takes ten Philips head screws, 3 mounting bolts, and 2 bolts on the bottom to separate the lower half of the vapor separator tank.

You will find the filter on the bottom of the pump inside the VST.

In instance the component is about make clean, using just a carb cleaner will be enough.

Replace

Some gunkhole owners may have their filters very dirty. In such situations, you will accept to supersede the whole thing.

Tip : Make sure that you change the 10-micron water separator annually. It would increase the longevity of the filter.

Treat the Fuel

As today's gasoline can break down inside weeks, you should treat every tank of fuel. Initially, it may seem like costly maintenance work. But you will save a lot of money in the long run.

According to Yamaha, add high-quality marine-specific non-booze-based formula. Information technology works finer in moisture-rich environments that are common to boats.
Furthermore, use cleansing additives Band Free PLUS which can preclude copper, brass, and silver solder in your fuel system from corrosion.
Likewise, make certain that the gas y'all are buying is fresh. So, avert the shops where the sale is slow.

Tip : Both ethanol and non-ethanol fuels have claim and demerits. The best activeness against the gas problem is to keep the boat running. You should use the engine as many times equally possible. Too, check and make clean the filters and fuel injectors regularly.

Are Yamaha VST Filters Expensive to Supplant?

Yes, the VST filter on your Yamaha outboard engine is very expensive to supercede compared to other filters on the fuel line.

The filter itself tin can toll yous around 50 bucks or more.

Furthermore, you accept to add the servicing charge to the toll which varies from country to state.

Even so, being able to do the replacement by yourself can save a lot of money. There are lots of online videos showing how to do it similar a professional.

I am maxim this because hiring a certified Yamaha mechanic can cost you more 500 hard-earned dollars.

How Often Should You Replace VST Filter On Yamaha Outboard?

According to the official user guideline, information technology is ideal to check or inspect the VST filter every 300 hours of operation.

Likewise, one should not wait in example the filter goes bad, and supersede it immediately.

At the aforementioned time, service and maintain the ten-micron external and initial on-engine filters.

Final Thoughts

I have described the signs and symptoms of bad Yamaha outboard VST filters.

You should take action by examining the land of the filter to maintain the life and performance of the gunkhole engine.

As it is expensive to supersede, the manufacturer recommends its users continuously service and maintain the kickoff two filters in the engine'due south fuel line. Also, care for the fuel in the tank to increase the life of the VST filter.

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