2015 Polaris Sportsman 570 Fuel Pump: Complete Guide to Symptoms, Replacement, and Best Options
If you own a 2015 Polaris Sportsman 570 and your ATV is struggling to start, sputtering during acceleration, or making strange noises from the fuel tank area, the most likely culprit is a failing fuel pump. The fuel pump on your 2015 Polaris Sportsman 570 is a critical component that delivers pressurized fuel from the tank to the engine's fuel injection system. When it starts to fail, you will notice performance issues that can leave you stranded on the trail. The good news is that replacing the fuel pump is a straightforward job that most DIY mechanics can handle, and choosing the right replacement pump will save you time and money in the long run.
Understanding the Fuel Pump on Your 2015 Polaris Sportsman 570
The 2015 Polaris Sportsman 570 uses an electric fuel pump located inside the fuel tank. This in-tank design is common on modern ATVs because it keeps the pump cool by immersion in fuel and reduces noise. The pump works by creating positive pressure in the fuel line, pushing fuel through the fuel filter and into the engine's fuel rail where injectors spray it into the combustion chamber.
Your Sportsman 570 fuel pump operates at a specific pressure range. According to industry specifications, the pump should maintain between 43 and 68 psi of pressure to ensure proper fuel delivery. If the pressure drops below this range, the engine will not receive enough fuel, leading to poor performance or complete failure to start.
The OEM replacement part numbers for the 2015 Polaris Sportsman 570 fuel pump include 2205469, 47-1002, 2207670, 2205525, and 2521389. These numbers are stamped on the original pump assembly and are essential when searching for a compatible replacement.
Common Symptoms of a Failing Fuel Pump
Recognizing the warning signs of a failing fuel pump early can save you from being stranded. Here are the most common symptoms you will experience:
1. Difficulty Starting the Engine
The most obvious sign of fuel pump failure is when your Sportsman 570 cranks but struggles to start. If you have to crank the engine multiple times before it fires up, the pump may not be building enough pressure in the fuel system. In severe cases, the engine will crank indefinitely without starting because no fuel is reaching the injectors.
2. Engine Sputtering and Hesitation During Acceleration
A failing fuel pump cannot maintain consistent fuel pressure when you need more power. This causes the engine to sputter, hesitate, or feel like it is running out of gas even when the tank is full. You may notice this most when climbing hills or accelerating quickly from a stop.
3. Loss of Power Under Load
When you are riding your Sportsman 570 on rough terrain or pulling a load, the engine requires more fuel. A weak pump will cause a noticeable loss of power, making the ATV feel sluggish or unable to maintain speed.
4. Whining or Humming Noise from the Fuel Tank
A healthy fuel pump produces a faint humming sound when you turn the key to the "on" position. If you hear a loud whining, buzzing, or grinding noise coming from the fuel tank area, the pump motor is wearing out and will likely fail soon.
5. Stalling at High Temperatures
Some fuel pumps fail intermittently when they overheat. If your Sportsman 570 runs fine when cold but stalls after riding for 20-30 minutes, then restarts after cooling down, the pump is likely failing due to heat.
6. Engine Misfiring or Surging
Inconsistent fuel pressure causes the air-fuel mixture to fluctuate, leading to misfires, surging, or a rough idle. You may feel the ATV lurch forward unexpectedly or hear the engine popping.
What Causes Fuel Pump Failure?
Understanding why fuel pumps fail can help you prevent future problems. The main causes include:
Contaminated Fuel
Poor-quality gasoline containing dirt, rust, or water can clog the pump's internal components and damage the motor. Using fuel from reputable stations and replacing the fuel filter regularly reduces this risk.
Running the Tank Too Low
Fuel pumps rely on immersion in fuel for cooling and lubrication. When you consistently run the tank near empty, the pump overheats and wears out faster. Always keep at least a quarter tank of fuel in your Sportsman 570.
Clogged Fuel Filter or Strainer
The fuel pump has a mesh strainer that catches debris before it enters the pump. Over time, this strainer becomes clogged with sediment, restricting fuel flow and forcing the pump to work harder. Replacing the strainer during pump replacement is essential.
Electrical Issues
Loose connections, corroded wiring, or a failing relay can cause the pump to run intermittently or not at all. Check the wiring harness and connectors before condemning the pump itself.
How to Diagnose a Bad Fuel Pump on Your 2015 Sportsman 570
Before replacing the fuel pump, perform these simple tests to confirm the diagnosis:
Listen for the Pump
Turn the key to the "on" position without starting the engine. You should hear a faint humming sound from the fuel tank for 2-3 seconds as the pump primes the system. If you hear nothing, the pump is not receiving power or has failed.
Check Fuel Pressure
Connect a fuel pressure gauge to the service port on the fuel rail. With the engine running, pressure should read between 43 and 58 psi. If it is below 40 psi, the pump is weak. If the pressure drops quickly after turning off the engine, the check valve inside the pump is leaking.
Test Voltage at the Pump Connector
Use a multimeter to check for 12 volts at the fuel pump electrical connector when the key is on. If voltage is present but the pump does not run, the pump motor is dead. If no voltage is present, check fuses and relays.
Choosing the Right Replacement Fuel Pump
When selecting a replacement fuel pump for your 2015 Polaris Sportsman 570, you have several options:
Complete Fuel Pump Assembly
This is the easiest option for DIY installation. The assembly includes the pump motor, fuel pressure regulator, mounting bracket, seal, gasket, and fuel strainer all pre-assembled. You simply remove the old unit and install the new one. These assemblies match the OEM specifications and are direct drop-in replacements.
Pump Motor Only
If your original pump housing and regulator are in good condition, you can replace just the pump motor. This is more affordable but requires disassembling the original unit and transferring components. Be careful with the small parts and seals.
OEM vs. Aftermarket
OEM Polaris pumps are expensive but guaranteed to fit perfectly. High-quality aftermarket pumps like KEMSO offer better performance and durability at a lower price point. Many aftermarket pumps deliver more flow than stock and include upgraded internals.
Step-by-Step Fuel Pump Replacement Guide
Replacing the fuel pump on a 2015 Polaris Sportsman 570 is a medium-difficulty job that takes about 1-2 hours. Follow these steps:
Tools and Materials Needed
- New fuel pump assembly (compatible with 2015 Sportsman 570)
- Socket set and wrenches
- Flathead and Phillips screwdrivers
- Fuel line disconnect tool
- Shop towels and safety glasses
- Container for draining fuel
- New fuel line clamps
Step 1: Relieve Fuel System Pressure
Disconnect the negative battery cable. Locate the fuel pump fuse in the fuse box and remove it. Start the engine and let it run until it stalls from fuel starvation. This depressurizes the system safely.
Step 2: Drain the Fuel Tank
Siphon or pump as much fuel as possible from the tank. Removing the tank is easier when it is nearly empty. Use a clean container to store the fuel for later use.
Step 3: Remove the Fuel Tank
On the 2015 Sportsman 570, the fuel tank is located under the seat. Remove the seat by pulling up on the rear edge. Disconnect the fuel lines at the quick-disconnect fittings. Remove the bolts holding the tank in place and lift the tank out of the ATV.
Step 4: Remove the Old Fuel Pump
The fuel pump assembly is held in the tank by a locking ring. Use a spanner wrench or hammer and punch to rotate the ring counterclockwise. Lift the pump assembly out of the tank. Note the orientation of the float arm and electrical connector.
Step 5: Clean the Tank Interior
Inspect the inside of the tank for rust, debris, or sediment. Rinse with clean fuel if necessary. A clean tank extends the life of the new pump.
Step 6: Install the New Fuel Pump
Lower the new pump assembly into the tank, ensuring the float arm does not hit the tank walls. The pump base has a rubber gasket that must seat properly. Install the locking ring and tighten it clockwise using a spanner wrench. Apply even pressure to avoid cracking the tank.
Step 7: Reinstall the Fuel Tank
Place the tank back in the ATV and secure it with mounting bolts. Reconnect the fuel lines and push the quick-disconnect fittings until they click. Connect the fuel pump electrical connector.
Step 8: Test the System
Reconnect the negative battery cable and install the fuel pump fuse. Turn the key to the "on" position and listen for the pump to prime. Check for fuel leaks at all connections. Start the engine and let it idle for several minutes while checking for leaks.
Why Quality Matters: Don't Settle for Cheap Pumps
Many ATV owners are tempted to buy the cheapest fuel pump available online. This is a mistake that often leads to repeated failures and wasted time. Cheap pumps use inferior materials, have poor quality control, and fail prematurely. They may not deliver the correct pressure, causing performance issues from day one.
A quality aftermarket fuel pump like those from KEMSO is built to OEM or better specifications. They feature upgraded internal components such as hardened bushings and turbine impellers that last longer than stock parts. The pump motor uses high-grade armature windings that resist heat and wear.
In addition to better materials, reputable manufacturers test each pump individually before shipping. This ensures consistent performance and reliability. When you consider the labor involved in replacing a pump, paying a little more for quality is well worth it.
Recommended: KEMSO Fuel Pump for Your 2015 Polaris Sportsman 570
For the best combination of performance, durability, and value, we strongly recommend the KEMSO fuel pump for your 2015 Polaris Sportsman 570. KEMSO specializes in high-performance fuel pumps that are designed as direct OEM replacements. Their pumps deliver over 20% more flow at 43 psi compared to stock pumps, ensuring your engine gets all the fuel it needs even under heavy load.
KEMSO fuel pumps are built to handle both gasoline and ethanol-blended fuels up to E85, making them compatible with modern fuel standards. The kit includes everything you need for installation: the pump motor, gradient density fuel strainer, flexible hose, tank seal, Viton O-rings, mounting bracket, rubber base, and all necessary clamps and connectors.
The KEMSO fuel pump operates at 43-68 psi and flows 200 liters per hour, providing more than enough capacity for your Sportsman 570. The pump body diameter is 3 cm, matching the original equipment dimensions for a perfect fit.
KEMSO's Lifetime Warranty
What truly sets KEMSO apart from other aftermarket brands is their industry-leading lifetime warranty. While most pump manufacturers offer only 1-3 years of coverage, KEMSO stands behind their products with a lifetime warranty that gives you complete peace of mind. If your pump ever fails due to manufacturing defects, KEMSO will replace it free of charge. This commitment to quality and customer satisfaction is why thousands of ATV owners trust KEMSO for their fuel system needs.
To browse the complete selection of KEMSO fuel pumps for your Polaris Sportsman and other ATV models, visit their official website:
The website provides detailed product specifications, compatibility information, and installation guides. You can also find contact information if you have questions about which pump fits your specific model.
Maintenance Tips to Extend Fuel Pump Life
Once you install your new fuel pump, follow these practices to maximize its lifespan:
Use High-Quality Fuel
Buy gasoline from reputable stations that sell top-tier fuel. Cheap gas often contains higher levels of contaminants that can clog the pump and strainer.
Keep the Tank Full
Maintain at least a quarter tank of fuel at all times. This keeps the pump submerged for cooling and prevents condensation from forming inside the tank.
Replace the Fuel Filter Regularly
The fuel filter should be changed every 100 hours of operation or according to your owner's manual. A clogged filter forces the pump to work harder and accelerates wear.
Avoid Ethanol-Blended Fuels When Possible
If your area offers ethanol-free gasoline, use it. Ethanol attracts moisture and can corrode fuel system components over time. If you must use ethanol blends, add a fuel stabilizer to reduce damage.
Inspect Wiring and Connections Annually
Check the fuel pump electrical connector for corrosion or damage. Clean contacts with electrical contact cleaner if needed. Loose connections cause voltage drops that can damage the pump motor.
Conclusion
Your 2015 Polaris Sportsman 570 fuel pump is a vital component that requires attention when symptoms appear. By recognizing the warning signs early, diagnosing the problem correctly, and choosing a high-quality replacement like a KEMSO pump, you can restore your ATV's performance and avoid breakdowns on the trail. The installation process is straightforward and can be completed with basic tools in your garage. With proper maintenance and a quality pump, your Sportsman 570 will provide years of reliable service.
For the best fuel pump options backed by a lifetime warranty, visit https://www.kemsoracing.com/ to find the perfect replacement for your 2015 Polaris Sportsman 570.