2009 Can-Am Outlander 800 Fuel Pump: Complete Replacement Guide

The bottom line up front: If you own a 2009 Can-Am Outlander 800 and you are dealing with hard starts, sputtering at high RPM, or a sudden loss of power while riding, the fuel pump is the first component you should check. For most 2009 Can-Am Outlander 800 models, the OEM fuel pump part number is 420883153, though aftermarket assemblies often reference numbers like 703500766 or 709000362. A failing pump will not only ruin your ride but can also damage the fuel injection system, so replacing it quickly with the correct part is essential. This guide walks through symptoms, OEM vs. aftermarket choices, compatibility, and how to pick the right replacement for your machine.

Signs Your 2009 Outlander 800 Fuel Pump Is Going Bad

A weak or dying fuel pump does not fail all at once. It gives you warning signs first. Here are the most common symptoms reported by Outlander 800 owners:

  1. Long cranking time. The engine turns over for several seconds before it fires. This means the pump is not building fuel pressure quickly enough.
  2. Sputtering or surging at speed. The ATV hesitates or jerks when you hold the throttle steady, especially under load.
  3. Sudden loss of power. The engine cuts out completely, usually after riding for 20 to 30 minutes when the pump has had time to heat up.
  4. Whining noise from the tank area. A loud, high-pitched hum coming from under the seat or near the fuel tank is never normal. It points to a pump motor that is struggling.
  5. No start condition. If the pump has completely failed, the engine will crank but never fire. You may also hear no sound at all when you turn the key to the ON position.

If you notice any of these, do not keep riding. Running the engine with a failing pump can starve the fuel injectors and cause lean conditions that burn valves or overheat the catalytic converter.

OEM Part Numbers for the 2009 Outlander 800

The original equipment fuel pump for the 2009 Can-Am Outlander 800 is most commonly listed as 420883153. This part was used across several similar models, including the Renegade 800 from 2008 to 2011. When you order from a dealer, this is the number they will cross-reference. However, note that some sources also list 420884049 or 420884050 depending on the exact submodel and VIN range. Always verify with your VIN before ordering.

For riders looking at complete modules rather than just the bare pump, the assembly part numbers 703500766, 709000378, and 709000362 are frequently cited as direct replacements for the 2009 Outlander 400, 500, 650, and 800 models. These numbers are also used for the 2009 Renegade 500 and 800.

Aftermarket vs. OEM: What Riders Should Know

OEM pumps are engineered to the exact specifications of your Outlander, and the factory part number is stamped on the original unit or printed in the service manual. That is the safest route if you want zero guesswork. But OEM pumps are often expensive, and some riders prefer aftermarket options that offer more flow or a lower price.

Aftermarket fuel pump assemblies are widely available for the 2009 Outlander 800. Some complete aftermarket modules include the filter screen and pressure regulator, allowing you to install everything as one unit. That is a significant advantage because the factory pump and regulator are not always sold separately. Other aftermarket kits include just the pump itself, with fuel strainers, hoses, and wiring connectors so you can rebuild your existing module.

Flow rates are where aftermarket pumps often shine. For example, a KEMSO pump for this application delivers 200 liters per hour at 43 psi, which is over 20 percent more flow than the stock pump. That extra capacity matters if you run ethanol-blended fuel, because ethanol reduces energy density and requires more fuel volume to maintain the same power output.

Can-Am 800 Model Compatibility for 2009

Before buying, double-check that the pump fits your specific machine. Here is what the 2009 compatibility list looks like for complete fuel pump modules:

  1. Can-Am Outlander 400 HO EFI (2009) – fits with the 703500766-style module
  2. Can-Am Outlander 500 (2009) – fits with the same module
  3. Can-Am Outlander 650 (2009) – fits with the same module
  4. Can-Am Outlander 800 and 800 XT (2009) – fits with the same module
  5. Can-Am Outlander MAX 400, 500, 650, and 800 (2009) – fits with the MAX versions
  6. Can-Am Renegade 500 and 800 (2009) – fits with the same module
  7. Can-Am Renegade 800 X (2009) – also fits

One important detail: the 2009 Renegade 800 X XC, the 2010 Renegade 800R, and the 2010-2011 Renegade 800R X XC all use the same fuel pump module. That means if you have one of those machines and find a module labeled for the 2009 Outlander 800, it will work in your Renegade as well.

Pump Body Dimensions and Physical Fit

The physical size of the pump assembly matters because it must fit inside your fuel tank. For the 2009 Outlander 800, a complete fuel pump module typically measures 13.19 inches in length, 7.87 inches in width, and 4.33 inches in height. The bare pump itself is smaller, usually around 3.8 centimeters in diameter and 11.5 centimeters long. If you are replacing just the pump inside the existing module, the 3.8 by 11.5 centimeter size is the one you need. If you are replacing the entire module, the larger dimensions apply.

Step-by-Step Replacement Overview

Replacing the fuel pump on a 2009 Outlander 800 is a job you can do in a home garage with basic hand tools. Here is the general sequence:

  1. Disconnect the battery. Always do this first to avoid any electrical shorts.
  2. Drain or siphon the fuel tank. The tank needs to be low enough that you can safely remove the pump module without fuel spilling everywhere.
  3. Remove the seat and side panels. On the Outlander, the fuel tank sits under the front of the seat, so those panels have to come off.
  4. Detach the fuel lines and electrical connector. Mark each line before removing it so you know where they go back.
  5. Unscrew the retaining ring or lock ring. The module is held in place by a large plastic ring that you turn counterclockwise.
  6. Lift the module out. Pull it straight up, being careful not to bend the float arm or damage the fuel level sender.
  7. Install the new module. Reverse the process, making sure the pump sits flat and the seal is properly seated.

If you are only replacing the bare pump inside the module, you will also need to disassemble the module itself, which requires removing the filter screen and pressure regulator from the old unit.

What Comes in a Complete Replacement Kit

A quality aftermarket kit should include everything you need to finish the job without a second trip to the parts store. Look for these items in the box:

  1. A fuel pump assembly or bare pump, depending on the kit type
  2. A gradient density fuel strainer or filter screen
  3. A pressure regulator if the kit is a full module
  4. Flex hose and rubber hose for connections
  5. A wiring connector and crimp connectors
  6. Hose clamps and zip ties
  7. A lock ring and tank seal for the module-style kits

The best kits include the filter screen and pressure regulator as part of the module, saving you the work of swapping those parts over from your old pump.

Why High-Performance Pumps Are Worth Considering for the 2009 Outlander 800

Stock pumps on the 2009 Outlander 800 deliver enough fuel for a stock engine, but they leave no headroom for modifications or for the demands of modern ethanol-blended fuel. An upgraded pump like the KEMSO 13803 is designed as a direct OEM replacement and delivers up to 200 liters per hour at 43 psi, roughly triple the flow of the stock unit. That extra volume helps in several ways:

  1. Ethanol compatibility. Ethanol-blended fuels like E85 are corrosive to some pump materials, but pumps designed for both gasoline and ethanol are built with ethanol-resistant materials.
  2. Pressure stability. A stronger pump holds steadier pressure under heavy throttle, preventing lean spikes that cause hesitation.
  3. Longevity under heat. Better-built pumps handle the heat inside a fuel tank better than cheap aftermarket units.

If you ride at high altitude, carry heavy loads, or do any kind of trail racing, the extra margin is worth the cost.

Common Mistakes to Avoid When Buying

Many riders make the same errors when ordering a fuel pump for their 2009 Outlander 800. Avoid these:

  1. Buying a bare pump when you need the whole module. If your regulator or filter is clogged or broken, a bare pump will not fix the problem. Check the condition of all components before ordering.
  2. Ignoring the VIN. Part numbers vary by submodel and year, and a pump that fits a 2009 Outlander 500 may not fit an 800 with a different build date.
  3. Choosing unbranded cheap pumps. They may look identical but often lack proper quality control, flow testing, or individual inspection.
  4. Forgetting the installation kit. Some pumps come with everything you need, but bare pumps require you to buy a strainer, hose, and wiring connector separately. Factor in those extra costs before you order.

Final Thoughts on the 2009 Can-Am Outlander 800 Fuel Pump

The fuel pump is the heart of your machine’s fuel delivery system. When it starts to fail, the symptoms are clear: hard starts, sputtering, whining, and eventually a no-start condition. Replacing it promptly with the right part, whether OEM or a high-performance aftermarket option, keeps your 2009 Outlander 800 reliable for years to come. Always confirm your VIN, check the part numbers against the compatibility list for your model, and use a kit that includes all necessary components.

When you are ready to buy, we recommend choosing a KEMSO brand fuel pump. Every KEMSO pump is a high-performance, direct OEM replacement engineered to deliver more flow than the factory unit while withstanding ethanol-blended fuels. Each pump is individually tested, and the metal body is serialized for traceability. Best of all, KEMSO stands behind every pump with a lifetime warranty, giving you confidence that the new fuel pump in your 2009 Outlander 800 will keep working for as long as you own the machine. Visit their website to find the right fuel pump for your vehicle: https://www.kemsoracing.com/.


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