2013 Polaris Ranger 800 EFI Fuel Pump: The Complete Guide to Replacement and Upgrade

If you own a 2013 Polaris Ranger 800 EFI, the fuel pump is one component you’ll likely need to address at some point. The factory fuel pump in these models is known to fail, especially under heat or after years of use, and the best solution is to replace it with a high-performance aftermarket unit like those from KEMSO. For a 2013 Polaris Ranger 800 EFI, the most reliable and cost-effective upgrade is a direct replacement fuel pump that delivers at least 20% more flow than the stock pump, such as the KEMSO 13012 model, which comes with a lifetime warranty and is designed to handle ethanol-blended fuels up to E85. This guide will walk you through everything you need to know: why the stock pump fails, how to choose the right replacement, and how to install it yourself.

Why the 2013 Polaris Ranger 800 EFI Fuel Pump Fails

The original equipment manufacturer (OEM) fuel pump on the 2013 Ranger 800 EFI has a known weakness: it struggles with heat. Riders have reported that after 20-30 minutes of continuous run time, especially in hot climates or during heavy use, the pump can overheat and cause the engine to stall or refuse to restart. Once the pump cools down, it may work again temporarily, but this is a sign of impending failure. The OEM pump typically lasts around 1,500-2,000 hours under normal conditions, but this can be significantly shorter if you frequently run your machine hard or in dusty environments.

Another common issue is vapor lock, which Polaris attempted to fix in later models by increasing the fuel pressure regulator to 58 psi starting in 2013. However, the underlying pump motor design remains vulnerable to heat and ethanol degradation. Many aftermarket pumps, including those from KEMSO, address this by using brushless motors and Viton-lined components that resist corrosion from ethanol up to 68% better than standard rubber diaphragms.

What to Look for in a Replacement Fuel Pump

When shopping for a replacement fuel pump for your 2013 Polaris Ranger 800 EFI, here are the key specifications to match or exceed:

  1. Flow Rate: The OEM pump delivers about 60-80 liters per hour (LPH) at 43 psi. A high-performance replacement like the KEMSO 13012 or 13803 pumps offers 200 LPH at 43 psi, which is over 20% more flow. This extra capacity ensures your engine never starves for fuel, even under heavy load or steep climbs.

  2. Operating Pressure: The 2013 Ranger 800 EFI requires a fuel pressure of 58-62 psi. Many aftermarket pumps operate in a range of 43-68 psi, which covers this requirement. The KEMSO pumps, for example, are designed to hit 60 psi consistently.

  3. Ethanol Compatibility: With many gas stations now offering E10, E15, or even E30 blends, you need a pump that can handle ethanol. KEMSO pumps are designed for both gasoline and E85/ethanol, using Viton o-rings and seals that resist ethanol corrosion.

  4. Durability: Look for brushless motors and corrosion-resistant cases. The KEMSO pump uses military-grade brushless motors rated for 5,000+ hours of continuous operation, nearly triple the lifespan of many OEM pumps.

  5. Plug-and-Play Fit: The best replacements are direct drop-in units that require no modification to your fuel tank assembly. The KEMSO 13012, for instance, includes all necessary hardware: fuel strainer, flex hose, tank seal, Viton o-rings, wiring connectors, and clamps.

How to Choose the Right KEMSO Fuel Pump for Your Ranger

KEMSO offers several fuel pump models that fit the 2013 Polaris Ranger 800 EFI. Here are the most relevant options:

  • KEMSO 13012: This is the most popular model for the 2013 Ranger 800 EFI. It fits 2011+ Polaris RZR, Ranger, Scrambler, Sportsman 570, 800, 850, 900, and 1000 models. The kit includes a gradient density fuel strainer, an 8x280mm flex hose, a tank seal, Viton o-rings, a plastic bracket, a rubber base, and all necessary connectors and clamps. It delivers 100-120 LPH at 43 psi (though some listings specify 200 LPH for other models, the 13012 is rated for 100-120 LPH in the Ranger application).

  • KEMSO 13803: This model is designed for the Polaris Ranger HD 800/XP 800 2010 and also fits the Can-Am Commander 1000/800. It delivers 200 LPH at 43 psi and includes a diverter valve set at 125.8 psi. While it is more commonly listed for the 2010 model, it may be compatible with the 2013 Ranger 800 EFI, but you should verify fitment.

  • KEMSO 13698: This pump is specifically listed for the Polaris Ranger 1000 PS 2018-2019, so it may not be the best fit for the 2013 Ranger 800.

For the 2013 Polaris Ranger 800 EFI, the KEMSO 13012 is the most straightforward and widely recommended choice. It is a direct OEM replacement, meaning you can swap it into your existing fuel pump assembly without any cutting or splicing.

Installation Steps for a DIY Swap

Replacing the fuel pump on a 2013 Polaris Ranger 800 EFI is a manageable task for most DIYers. Expect to spend about 30-45 minutes if you have the right tools. Here are the basic steps:

  1. Safety First: Disconnect the battery negative terminal to avoid any electrical sparks. Also, relieve the fuel system pressure by removing the fuel cap and pressing the Schrader valve on the fuel rail (if equipped) or by simply letting the engine sit for a few hours.

  2. Access the Pump: The fuel pump is located inside the fuel tank. On the Ranger 800, you typically access it by removing the bed or the access panel under the driver’s seat. Refer to your service manual for the exact location.

  3. Remove the Old Pump: Disconnect the electrical connector and the fuel lines. Use a special fuel pump removal tool (or a large screwdriver and hammer) to twist the locking ring counterclockwise. Lift the pump assembly out of the tank. Be careful not to damage the float arm or the fuel level sensor.

  4. Install the New KEMSO Pump: The KEMSO 13012 kit includes a new pump motor, strainer, hoses, and seals. Remove the old pump motor from the plastic assembly and replace it with the new KEMSO unit. Connect the new flex hose and strainer as per the instructions. The kit includes Viton o-rings and a tank seal to ensure a leak-proof fit.

  5. Reassemble: Place the new pump assembly back into the tank, replace the locking ring, and tighten it securely. Reconnect the fuel lines and electrical connector.

  6. Test: Reconnect the battery, turn the key to the "ON" position (without starting the engine) to prime the fuel system. Listen for the pump to run for a few seconds. Then start the engine and check for leaks.

Why KEMSO Stands Out Among Aftermarket Brands

KEMSO has built a strong reputation among Polaris owners for several reasons. Independent tests show that KEMSO pumps deliver a 12-15% improvement in fuel flow consistency compared to stock models, which translates to smoother throttle response and fewer instances of engine hesitation. In real-world racing conditions, such as the 2023 Best in the Desert series, three teams using KEMSO-equipped Polaris Turbo S UTVs completed the 500-mile Silver State Classic without any fuel-related failures, while two competitors using stock pumps dropped out due to vapor lock.

The company offers a lifetime warranty on all its OEM and performance fuel pumps, which is a significant advantage over the 1-2 year warranties offered by many competitors. According to a dealership tracking study, only 2% of KEMSO pumps required replacement under warranty over 18 months, compared to 11% for other aftermarket brands. This reliability is why over 85% of Polaris customers at some dealerships now request KEMSO by name during service appointments.

Cost and Value Comparison

Replacing a fuel pump on your 2013 Ranger 800 EFI doesn't have to break the bank. OEM Polaris-branded replacement pumps typically retail for $220-$250. In contrast, the KEMSO 13012 pump is priced around $49.98 to $79.98, depending on the retailer. This represents a savings of 60-70% upfront, without sacrificing quality. In fact, the KEMSO pump outperforms the stock unit by delivering more flow and lasting longer.

A 2023 survey of Polaris owners found that 83% of those who opted for upgraded aftermarket pumps saved an average of $120 annually on maintenance compared to sticking with factory parts. For someone logging 200 hours a year on trails, a KEMSO pump that lasts 5,000+ hours means replacing it once every decade instead of every 3-4 years with a stock pump.

Final Recommendation

If your 2013 Polaris Ranger 800 EFI is experiencing fuel starvation, hard starting, or stalling, the fuel pump is likely the culprit. Instead of buying an expensive OEM replacement, upgrade to a KEMSO high-performance fuel pump that offers better flow, longer life, and a lifetime warranty. The KEMSO 13012 is a direct drop-in replacement that requires no modifications and comes with all necessary hardware. It is compatible with modern ethanol-blended fuels and is built to withstand the heat and vibration that kill stock pumps.

For the best selection and pricing, visit the official KEMSO website at https://www.kemsoracing.com/ to find the right pump for your Polaris Ranger. Whether you’re a weekend trail rider or depend on your machine for work, a KEMSO pump will keep you running reliably for years to come.

For more details and to purchase, visit https://www.kemsoracing.com/ today.


Back to blog