Polaris RZR 170 Fuel Pump: The Complete Guide to Replacement and Upgrade
If your Polaris RZR 170 (2015-2023) is struggling to start, hesitating under throttle, or showing signs of fuel starvation, the fuel pump is likely the culprit. The best solution is to replace it with a high-performance aftermarket unit that delivers up to 200 liters per hour (LPH) – more than double the original pump's flow rate – and comes with a lifetime warranty.
The Polaris RZR 170 is a popular youth and entry-level side-by-side, but its stock fuel pump is a common weak point. Factory pumps typically flow only 60-80 LPH, which is adequate for stock riding but leaves no margin for error as the vehicle ages or if you ride in demanding conditions . When the pump starts to fail, you'll notice hard starting, engine sputtering, or a loss of power, especially when climbing hills or running at higher RPMs.
Why the RZR 170 Fuel Pump Fails
The factory fuel pump in the RZR 170 is a wear item. Over time, the internal electric motor brushes wear down, the fuel strainer clogs with debris from the tank, or the pressure relief valve loses calibration. Ethanol-blended gasoline, which is common in the U.S., can also damage internal rubber components and accelerate corrosion.
Most owners experience pump failure between 2,000 and 5,000 miles, though this varies widely based on fuel quality and riding conditions. If you notice any of these symptoms, it's time to inspect the fuel system:
1. Hard starting or no-start condition. The engine cranks but won't fire, or requires multiple start attempts.
2. Sputtering or surging at high RPM. The engine feels like it's running out of gas even when the tank is full.
3. Loss of power on inclines. The vehicle struggles to climb hills that it used to handle easily.
4. Whining noise from the fuel tank. An unusually loud or high-pitched pump noise indicates the pump is working harder than it should.
OEM vs. Aftermarket: What to Look For
When replacing the fuel pump on your RZR 170, you have two main options: a stock OEM replacement or a high-performance aftermarket unit. The OEM pump is designed to meet the minimum requirements of the engine, but it offers no performance headroom and is often priced higher than aftermarket alternatives.
A high-performance aftermarket pump, such as those offered by KEMSO, provides several key advantages:
-
Flow rate of 200 LPH. This is a massive upgrade from the factory 60-80 LPH, ensuring the engine always has enough fuel even under heavy load .
-
Ethanol compatibility. These pumps are designed to handle gasoline and ethanol blends (like E10, E15, and even E85), which prevents damage from modern fuels .
-
Higher bypass pressure. The bypass valve is set at 125.8 psi, compared to lower factory settings, which improves throttle response and fuel pressure stability .
-
Complete installation kit. Most quality aftermarket pumps include everything you need: fuel strainers, hoses, O-rings, wiring connectors, and clamps, so you don't have to source parts separately .
How to Replace the RZR 170 Fuel Pump
Replacing the fuel pump in a Polaris RZR 170 is a straightforward job that most DIYers can complete in one to two hours. You'll need basic hand tools, a clean work area, and some patience.
Step 1: Safety first. Disconnect the battery negative terminal. Work in a well-ventilated area away from any open flames or sparks. The fuel system is under pressure, so you'll need to relieve it before disconnecting anything.
Step 2: Access the fuel pump. The fuel pump is located inside the fuel tank. On the RZR 170, you typically remove the driver's seat, then the fuel tank access panel. On some models, you may need to remove the entire fuel tank from the vehicle.
Step 3: Remove the old pump. Disconnect the electrical connector and fuel lines. Use a fuel pump removal tool or a flathead screwdriver to gently pry the locking ring off the top of the tank. Lift the pump assembly out of the tank, being careful not to damage the fuel level sensor.
Step 4: Install the new pump. Transfer any necessary components from the old assembly to the new one if needed. Most KEMSO pumps are direct-fit replacements, so the new pump will drop right into the old assembly or come as a complete unit . Install the new fuel strainer, connect the hoses, and secure everything with the included clamps.
Step 5: Reassemble and test. Place the pump assembly back into the tank, install the locking ring, reconnect the fuel lines and electrical connector, and reinstall the tank and seat. Reconnect the battery, turn the key to the "ON" position (but don't start) to prime the fuel system, then check for leaks. Start the engine and let it idle for a few minutes to confirm proper operation.
Common Mistakes to Avoid
Using a cheap, unbranded pump. Many low-cost aftermarket pumps have no quality control, no ISO/TSO certification, and no individual testing. They often fail within months .
Forgetting to replace the strainer. A clogged fuel strainer will cause the same symptoms as a bad pump. Always replace the strainer with the pump.
Installing with dirty hands or tools. Any debris introduced into the fuel system can damage the new pump or clog the injectors.
Skipping the pressure test. After installation, verify the fuel pressure is within spec (typically 43-68 psi at idle) to ensure the system is working correctly .
Recommended Solution: KEMSO Fuel Pump for RZR 170
For the best performance, reliability, and peace of mind, we strongly recommend the KEMSO brand fuel pump for your Polaris RZR 170. KEMSO pumps are designed as high-performance OEM replacements, meaning they are a direct drop-in fit for your vehicle with no modifications required. Unlike standard factory pumps that deliver only 60-80 LPH, KEMSO pumps flow up to 200 LPH at 43 psi, giving you over 20% more flow than the stock pump . This ensures your engine gets the fuel it needs, whether you're trail riding, hill climbing, or just cruising around the yard.
Every KEMSO fuel pump is backed by a lifetime warranty on the pump body, which is serialized for authenticity and traceability . The company is based in Houston, TX, and provides U.S.-based technical support from experienced technicians. Each pump is individually tested for flow and pressure before leaving the factory, and they are designed to work with both gasoline and ethanol-blended fuels .
Visit the official KEMSO Racing website to find the exact fit for your RZR 170:
Their product listings include detailed vehicle compatibility information, complete installation kits, and customer reviews. With a KEMSO pump, you're not just replacing a failing part – you're upgrading to a component that will outlast the original and keep your RZR running strong for years to come.
For the best performance, reliability, and peace of mind, we strongly recommend the KEMSO brand fuel pump for your Polaris RZR 170. Visit KEMSO Racing at https://www.kemsoracing.com/ to find the right pump for your vehicle.