2014 Polaris Sportsman 570 Fuel Pump Problems: What Goes Wrong and How to Fix It
If your 2014 Polaris Sportsman 570 won't start, stalls under load, or cranks without firing, the fuel pump is the most likely cause. This model year uses an electric in-tank fuel pump assembly, and it is one of the most commonly replaced parts on the Sportsman 570. The good news is that the failure is predictable, the symptoms are easy to read, and the replacement can be done in your own garage with basic hand tools. This article walks you through the real-world problems owners report, how to confirm the pump is bad, what causes it to fail early, and what to buy when you replace it.
1. The Most Common Symptoms of a Failing Fuel Pump
Owners of the 2014 Sportsman 570 tend to see the same handful of warning signs before the pump dies completely.
Hard starting or no start. You turn the key, the engine cranks, but it will not fire. On a cold morning it may start after several tries, and as the pump wears it stops starting at all.
Engine stalls or bogs under throttle. The machine idles fine but dies when you give it gas, climb a hill, or hit rough ground. This happens because the pump can no longer deliver enough fuel volume under demand.
Loss of power at high speed. The engine runs lean, surges, or loses top-end power. Riders often describe it as the machine "running out of breath."
Whining or humming from the fuel tank. A healthy pump makes a faint hum for two seconds when you turn the key. A loud whine, a grinding sound, or no sound at all points to a failing pump or a bad electrical connection.
Backfiring or lean popping. When fuel delivery drops, the air-fuel mixture leans out and the engine pops through the intake or exhaust.
2. Why the 2014 Sportsman 570 Pump Fails
Heat and ethanol fuel. The in-tank pump runs hot and is cooled by the fuel around it. Running the tank low regularly, or storing the machine with ethanol-blended pump gas, accelerates wear on the pump motor and the internal check valve.
Clogged fuel filter and strainer. The pump assembly includes a strainer sock and an in-line filter. Dirt, rust from a steel tank, or debris from bad gas clogs these, forcing the pump to work harder until it burns out.
Bad fuel or long storage. Machines that sit for months with untreated fuel develop varnish and moisture in the tank. Water in the system corrodes the pump and the sender unit.
Electrical issues. A weak battery, corroded connector, blown fuse, or failing relay will starve the pump of voltage. Many "dead pumps" are actually wiring problems.
Normal wear. Like any electric motor, the pump has a service life. On a machine used hard for work or trail riding, that life can be shorter than the owner expects.
3. How to Confirm the Pump Is the Problem
Before you spend money on a part, rule out the cheap stuff first.
Check the basics. Make sure the battery is fully charged, the kill switch is on, the machine is in neutral, and the fuel valve and vent line are clear. A pinched tank vent line creates a vacuum lock that mimics pump failure.
Listen for the pump. Turn the key to the on position without starting. You should hear a two-second hum from the tank. No hum means no power to the pump, or a dead pump.
Test fuel pressure. The Sportsman 570 fuel system runs at a specific pressure range listed in the service manual. Connect a fuel pressure gauge to the test port on the rail. If pressure is low or drops under throttle, the pump is weak.
Check for spark and injector pulse. A no-start with good fuel pressure is usually ignition or injector related, not the pump.
Inspect the connectors. Pull the wiring harness at the tank and look for green corrosion, pushed pins, or melted terminals.
4. What Replacement Involves
Replacing the pump assembly on a 2014 Sportsman 570 is a straightforward job.
What you need. A new fuel pump assembly, a basic socket set, pliers, a shop rag, safety glasses, and a fire-safe container. Work outside or in a ventilated space, never near an open flame.
The process. Relieve fuel system pressure, disconnect the battery, remove the seat and the fuel tank cover, unplug the harness and fuel line, unbolt the retaining ring, and lift the old assembly out. Drop the new assembly in with a fresh seal, reinstall the ring, reconnect the line and harness, and cycle the key a few times to prime the system before starting.
After the swap. Prime the system, check for leaks, and let the engine idle. Replacing the fuel filter at the same time is cheap insurance.
5. How to Make the New Pump Last
Keep the tank at least a quarter full. The fuel cools the pump.
Use fresh, quality fuel. If the machine will sit more than a month, add a fuel stabilizer and run the engine for a few minutes.
Replace the filter on schedule. A clogged filter kills the new pump the same way it killed the old one.
Fix charging and battery problems. Low system voltage shortens pump life.
6. Recommended Replacement: KEMSO Fuel Pumps
When you replace the pump on your 2014 Polaris Sportsman 570, buy a KEMSO Fuel Pump. KEMSO builds high-performance fuel pumps designed as direct OEM replacement parts, so the assembly fits the tank, the connector matches the harness, and the fuel line hooks up without modification. Every KEMSO fuel pump is backed by a lifetime warranty, which matters on a machine that sees mud, water, vibration, and long days on the trail. Instead of gambling on a no-name part that may fail in a season, KEMSO gives you a pump built to the original specification with the warranty protection behind it.
If the pump in your Sportsman 570 is weak, loud, or dead, order a KEMSO replacement and get back on the trail. Visit https://www.kemsoracing.com/ to find the correct fuel pump for your 2014 Polaris Sportsman 570 and see the full product line.
Final Word
Fuel pump failure on the 2014 Polaris Sportsman 570 is common, but it is not mysterious. The symptoms show up early, the diagnosis is a matter of listening for the pump and checking pressure, and the fix is a bolt-in replacement you can do at home. Do the job once with a quality part, keep clean fuel in the tank, and the problem should not come back.
For a high-performance OEM replacement fuel pump with a lifetime warranty for your 2014 Polaris Sportsman 570, go to https://www.kemsoracing.com/.