Sylvie Willis
If you're looking to apply a fuel line to your Polaris Sportsman, it's important to understand the correct routing and connections to avoid any mishaps. The fuel line enters the carburettor near the top and travels down to the fuel bowl, and there is a specific process to identify the reserve line and the main fuel line. It's also important to note that the outlets may be switched, and there are methods to identify the correct routing.
| Characteristics | Values |
|---|---|
| Fuel line identification | The main fuel line and reserve line coming out of the bottom of the gas tank may be switched due to a previous service. |
| Determining the reserve port | Pour a small amount of mineral spirits or alcohol into the tank; the port the fuel runs out of first is the reserve. |
| Petcock connection | The reserve line connects to the petcock, and turning the knob to the 'ON' position should prevent fuel flow out of the petcock until the liquid level in the tank is sufficiently high. |
| Fuel line routing | The fuel line appears to enter the carburetor (carb) near the top and travels down to the fuel bowl. |
| Vent line routing | The vent line is kept as high as possible, often under the fuel tank area near the air intake to keep it dry and clean. |
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What You'll Learn
Identifying the main fuel line and the reserve line
The main fuel line is typically the line that connects directly to the fuel tank and supplies fuel to the engine. It is often the larger of the two lines and may have a filter attached to it. In some Polaris models, the main fuel line is located at the top of the fuel tank, where it connects to a weighted pickup assembly. This line ensures a consistent fuel supply to the engine during various riding conditions.
On the other hand, the reserve line is usually the smaller of the two and serves as a backup fuel supply. It may be connected to a secondary fuel tank or a reserve compartment within the main tank. The reserve line comes into play when the main fuel supply is depleted, allowing you to continue operating the vehicle for a limited period until you can refuel.
To identify the main fuel line and the reserve line, start by consulting the fuel line diagram specific to your Polaris model. These diagrams can be found in service manuals or online forums dedicated to Polaris vehicles. The diagram will provide a visual representation of the fuel lines and their connections.
Additionally, you can perform a simple test to identify the main and reserve lines. Start by locating the petcock, which is a valve that controls the fuel flow. Connect a length of fuel line to the petcock and then to a fuel can. Turn on the main fuel supply and allow the fuel to drain into a measuring cup or graduated vessel. Once the main supply is depleted, switch to the reserve, and measure the amount of fuel that comes out. This will help you understand which line is the main supply and which is the reserve.
It's important to note that the orientation of the fuel lines may vary depending on the model and year of your Polaris vehicle. In some cases, the outlets may have been switched during a previous service. Therefore, it's always a good idea to consult a professional or a trusted Polaris forum if you're unsure about the identification of the main fuel line and the reserve line.
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Connecting the reserve line to the petcock
- Start by attaching a new piece of fuel line to the petcock. Ensure you have the correct fuel line for your vehicle, as different models may require specific parts.
- Obtain a funnel and a gas can. Place the funnel into the gas can, and insert the free end of the fuel line into the funnel.
- Turn the petcock to the "ON" position, which is usually indicated by a lever pointing straight down. Ensure that the gas flows into the gas can.
- Once the gas stops flowing, mark the fuel level in the gas can with a marker. This will help you monitor your fuel usage and know when to refill.
- Now, turn the petcock to the "RESERVE" position, which is typically indicated by the lever pointing to the back of the bike. The gas should start flowing again, and when it stops, you'll know the amount of fuel left in the reserve.
- It is important to note that using the reserve fuel needlessly can draw particles into the carburettor. Additionally, regularly filling the tank after each ride helps minimize condensation formation.
- To maintain optimal performance, it is recommended to switch back to the "ON" position once you have filled up, ensuring that you have spare fuel available.
By following these steps, you will successfully connect the reserve line to the petcock on your Polaris fuel line, allowing you to utilize the reserve fuel function when needed.
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Knowing the correct petcock connection
To identify the correct petcock connection, start by pouring a small amount of mineral spirits or alcohol into the tank. The port from which the fuel runs out first is the reserve port. Once you've identified the reserve port, you can determine the main fuel line port. It's important to ensure that the lines are not crossed, as this can affect the performance of your Polaris vehicle.
The fuel line should enter the carburetor near the top and travel down to the fuel bowl. The line coming out of the top of the carburettor should have a cap on it, and you can identify the fuel connection by looking for a small barb. The vent line on larger Sportsman vehicles is typically located under the fuel tank area, near the air intake, to keep it dry and clean.
When you have identified the correct petcock connection and made the necessary adjustments, turn the knob to the 'ON' position. If the connection is correct, there should be no flow out of the petcock until the liquid level in the tank has sufficiently reached the top. This is a crucial step to ensure that your Polaris fuel line is functioning correctly and safely.
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Understanding the fuel line routing
For example, the Sportsman 90 model has a specific fuel line routing that has been discussed by users. The fuel line appears to enter the carburettor (carb) near the top and travels down to the fuel bowl. This is an important detail to note as it impacts the overall performance of the vehicle.
In addition, the vent line routing is also a crucial aspect of the fuel system. It is recommended to keep the vent line as high as possible to maintain dryness and cleanliness. On larger Sportsman models, the vent line is typically located under the fuel tank area, near the air intake.
Another aspect to consider is the main fuel line and the reserve line. On some Polaris models, such as the 2003 Polaris Sportsman 700 twin, the fuel lines coming out of the bottom of the gas tank may be mixed up. To identify the correct lines, a small amount of mineral spirits or alcohol can be poured into the tank. The port from which the fuel flows out first is the reserve line. The petcock ports may be labelled, but it's important to verify their orientation.
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Locating the vent line
In some Polaris models, the vent hose is 5 feet long, ending 2 feet above the tank. It is important to note that the vent line should not have any positive or negative pressure, as this could indicate a bad seal. To locate the vent line, you can start by visually inspecting the area around the gas tank. Look for a hose with an elbow fitting that snaps into the frame above the driver's rear tire.
If you are experiencing fuel leakage or gas fumes, it is important to check the vent line for any blockages or restrictions. You can do this by disconnecting the vent at the tank and blowing through the vent tube and the vent nipple on the tank. This will help you verify if there is any blockage. Additionally, you can refer to your Polaris manual for more specific information on locating and troubleshooting issues with the vent line.
In some cases, the vent line may be difficult to access, requiring you to tear out most of the interior or cut out some plastic to reach the vent connection. If you are experiencing persistent issues with fuel leakage or gas fumes, it is recommended to consult a Polaris dealer or a qualified technician for further assistance.
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Frequently asked questions
To identify the main fuel line and the reserve line, pour a small amount of alcohol or mineral spirits into the tank. The port from which the fuel runs out first is the reserve. The petcock ports are labelled, but they may be reversed depending on the device's orientation.
Connect the reserve line to the petcock and turn the knob to the reserve position as indicated on the plastic side panel. If no liquid flows out of the nipple to the fuel pump, switch the line to the other inlet nipple.
When you have connected the fuel line correctly, turning the knob to the 'ON' position should not result in any flow out of the petcock until the liquid level in the tank has sufficiently reached the top.
