Sometimes a snowmobile loses power at full throttle when you are driving.
This is always a very unpleasant situation especially if it occurs during a competition.
A snowmobile will lose power at full throttle when the carburetor is faulty or dirty, use of bad quality fuel, bad fuel pump or if there is low compression in the snowmobile engine cylinder.
When this occurs, the snowmobile will not be able to perform well and the efficiency of the snowmobile will be badly reduced.
That is why an early fix is necessary in order to maintain a smooth snowmobile drive time.
Why Snowmobile Loses Power At Full Throttle
1) Loose Throttle Cable
When driving the snowmobile, the speed that you drive with can be controlled at any time.
This is made possible with the help of the throttle.
But for the throttle to function well, it has to be well connected.
This connection is made possible with the use of the throttle cable.
The throttle cable helps in sending the command from the throttle to the engine of the snowmobile.
That is why when throttle turn is not increased, the throttle cable will be soft.
This will generate little power from the snowmobile engine especially when it is at idle mode.
But when you are accelerating the snowmobile, you have to increase the turn of the throttle stick.
This makes the throttle cable more firm.
Due to this, the carburetor is signaled that a higher speed and power from the engine is needed hence more fuel to the snowmobile engine.
At such point, you will observe that the snowmobile will move faster with more power from the snowmobile engine when at full throttle.
But when the throttle is not well connected or loosely connected, the snowmobile will lose power at full throttle.
2) Faulty Carburetor
When the throttle is turned to full, it raises a signal to the carburetor of the snowmobile.
This signal simply tells the carburetor that a higher level of acceleration is needed.
The carburetor then communicates to the engine by sending more fuel to help the engine produce the needed power.
But this may not be possible if the carburetor in the snowmobile is bad.
This could be that the carburetor is clogged with dirt or bad.
Due to this, the carburetor will not be able to release the needed volume of fuel that the snowmobile engine requires to keep up with the power need.
This is why snowmobile loses power at full throttle when the carburetor is clogged.
At such a situation, the snowmobile will not be able to function well.
3) Faulty Fuel Pump
For your snowmobile engine to perform well, it has to be fed with the right volume of fuel.
This is what will help the snowmobile to run well.
For the snowmobile to receive the right volume of fuel, a device must be able to handle that function.
The device in the snowmobile that performs this function is the fuel pump in the snowmobile.
With the help of the fuel pump in the snowmobile, fuel is released from the tank at the right volume and pressure.
When the snowmobile is accelerating or at full throttle, the fuel pump outputs more volume of fuel.
This helps the snowmobile to be able to produce the needed power and acceleration.
But when the fuel pump in the snowmobile is bad, the fuel supplied to the snowmobile engine will not be adequate.
This is even worse when the snowmobile is at full throttle.
This is one of the reasons why snowmobile loses power at full throttle.
4) Faulty Snowmobile Reed Valves
For two stroke engine snowmobiles, the ratio of air to fuel mixture is very important to help the snowmobile function well.
This is what will help fuel to burn well inside the engine of the snowmobile.
When the fuel is burnt well, the engine of the snowmobile will be able to produce the needed power.
But when there is a problem with the reed valves in the snowmobile, the combustion of fuel in the engine will be bad.
This is because the reed valves will not be able to provide clean air to mix well with the fuel in the snowmobile engine.
Due to this, situations like rough performance of the snowmobile engine will be experienced.
The snowmobile loses power at full throttle when the reed valves of the snowmobile is bad.
5) Low Compression In Snowmobile Engine
The compression in the cylinder of a snowmobile is very vital in the performance of a snowmobile.
If the compression in a snowmobile cylinder is good, the snowmobile will be able to produce power well.
But if the compression in the cylinder of the snowmobile is low, the performance of the snowmobile will be affected.
This will really show up when you are accelerating the snowmobile at full throttle.
At such point, more power is required from the snowmobile engine.
But due to the existence of vents or leakage in the cylinder, the compression from the snowmobile engine will be low.
This negatively affects the performance of the snowmobile by reducing the power it outputs.
6) Use Of Bad Fuel
When buying fuel for use in your snowmobile, you have to be careful of the quality of the fuel that you buy.
This is because the quality of a fuel has a high function to play in the performance of the snowmobile.
If the quality of the fuel is good, the snowmobile will be able to function well.
But if the quality of the fuel used in the snowmobile is bad, the performance of the snowmobile will suffer.
This is because the poor quality fuel will not be able to burn efficiently in the engine of the snowmobile.
When this happens, the snowmobile will not be able to produce the needed power.
This is one of the reasons why a snowmobile will lose power when it is at full throttle.
When the quality of fuel in a snowmobile is bad, it will contain impurities.
Apart from containing impurities, a bad quality fuel will also contain water in it.
This affects the functionality of the fuel pump as well as the performance of the engine of the snowmobile.
Easy Fix When Snowmobile Loses Power At Full Throttle
1) Tighten Throttle Cable To The Right Tension
To help your snowmobile to perform well without jerking when the throttle is at full level, the throttle cable has to be tensioned well.
In tensioning the throttle cable, it must not be too tight.
This will only make the engine to be too noisy.
When tensioning the throttle cable, it has to be done well.
That is why it has to be done by a technician that will know the right tension that the throttle cable should be at.
This will help the snowmobile to produce the needed power when the throttle is adjusted.
2) Use a Good Fuel
For the snowmobile to produce power, it has to be fed with fuel.
In feeding the snowmobile engine with fuel, the quality of the fuel has to be a good one.
This will help the snowmobile engine to burn the fuel efficiently and produce the required power.
But if the quality of the fuel is bad, it will contain impurities in it or contain water.
This will not produce an efficient combustion in the cylinder of the snowmobile.
The snowmobile loses power at full throttle when this occurs.
But when a good quality of fuel is used, the snowmobile will be able to produce the needed power when at full throttle.
3) Clean Clogged Carburetor
As the duration of your snowmobile gets higher, some of the parts of the snowmobile will be damaged and will require a replacement.
Others may not get damaged but will need some servicing at some point to help the snowmobile to function well.
One of such parts that will need maintenance is the carburetor of the snowmobile.
This is to help remove some of the debris that might be inside the carburetor of the snowmobile.
This will help the engine of the snowmobile to receive the right amount of fuel when the carburetor of the snowmobile is well cleaned and free from debris.
4) Use a Good Fuel Pump
If at all you want your snowmobile to function well, you have to make sure that the quality of fuel supplied to the engine is okay.
For this to be possible, the fuel pump in the snowmobile has to function well.
That is why you have to make sure that you are making use of the right capacity of fuel pump in your snowmobile at all time.
This will help the engine of the snowmobile perform well.
If you use a fuel pump that is higher that the snowmobile, this can harm the performance of the snowmobile.
Also if the capacity of the fuel pump in your snowmobile is too small, it will put too much pressure on your snowmobile fuel pump.
This will make your snowmobile fuel pump to spoil easily.
Apart from the fuel pump getting damaged when it is lower than the capacity of the engine, the engine of the snowmobile will be starved from getting the right volume of fuel.
Due to this, the snowmobile loses power at full throttle.
Further Reading