808492 Fuel Pump: The Complete Guide to Replacement, Compatibility, and Performance

If you own a lawn mower, garden tractor, or small engine equipment and need a reliable replacement for the 808492 fuel pump, here is the bottom line: The 808492 fuel pump is a vacuum-operated replacement part designed for engines ranging from 17 to 27 horsepower, commonly used in John Deere, Briggs & Stratton, Kohler, Kawasaki, and Honda equipment. This pump is essential for delivering fuel from the tank to the carburetor, and choosing the right replacement can save you time, money, and frustration. In this guide, I will walk you through everything you need to know about the 808492 fuel pump, including compatibility, installation tips, and the best options available on the market today.

What Is the 808492 Fuel Pump?

The 808492 fuel pump is a vacuum-style pump that uses engine vacuum to draw fuel from the tank and push it into the carburetor. Unlike electric fuel pumps found in modern cars, this pump is mechanical and relies on the engine's natural vacuum pulses to operate. It is most commonly found on small engines used in riding lawn mowers, zero-turn mowers, generators, and other outdoor power equipment.

This pump replaces several part numbers across different brands, including Briggs & Stratton 808492, 808656, 491922, and Kohler 24 393 04-S and 24 393 16-S. It typically fits 1/4-inch fuel lines and is not compatible with fuel containing more than 10% ethanol, which is an important consideration for anyone using E15 or higher blends.

Common Applications and Compatible Equipment

The 808492 fuel pump is widely used across multiple brands and models. Here are the most common applications:

  1. John Deere Riding Mowers: This pump fits the LA100 series (LA105, LA110, LA115, LA120, LA125, LA130, LA135, LA140, LA145, LA150, LA155, LA165, LA175), as well as the L series (L105, L107, L108, L118, L120, L130) and LX series (LX277, LX280, LX288). It also works with Z-series zero-turn mowers such as the Z225, Z235, Z245, Z255, Z335E, Z335M, Z345M, Z345R, Z355R, Z375R, Z425, Z435, Z445, and Z465.

  2. Briggs & Stratton Engines: The 808492 pump is compatible with Briggs & Stratton engine models 28B702, 28B707, 28M707, 28N707, 28P777, 28Q777, 351442, and 351447. These engines are found in many riding mowers and garden tractors.

  3. Kohler Engines: This pump works with Kohler CH17 through CH25 and CV17 through CV25 engines, which are common in 17 to 25 horsepower applications. It also fits CH730 through CH740 and CV730 through CV740 models.

  4. Kawasaki Engines: The 808492 is suitable for Kawasaki 15 to 25 HP engines found in equipment like the Mule 600 and 610 4X4 models from 2007 to 2014.

  5. Honda Engines: It fits Honda models including EB11000, EN2000, EN2500, FG400, FG500, WN20, WN30, and engines in the GC, GCV, and GS series.

Key Features and Specifications

Understanding the specifications of the 808492 fuel pump will help you make an informed purchasing decision:

Flow Rate: The 808492 pump delivers a steady flow of fuel adequate for engines up to 25-27 horsepower. While exact flow rates vary by manufacturer, most aftermarket replacements are designed to meet or exceed OEM specifications.

Pressure: This is a low-pressure vacuum pump, typically delivering 2-4 PSI at the carburetor. It is not designed for fuel-injected systems or high-pressure applications.

Fuel Line Size: The pump fits standard 1/4-inch ID fuel lines, which is the industry standard for small engines.

Fuel Compatibility: Most 808492 replacements are compatible with gasoline containing up to 10% ethanol (E10). Using higher ethanol blends can damage the diaphragm and internal components.

Construction: Quality replacements feature durable materials such as reinforced plastic or metal bodies, with internal diaphragms designed to resist fuel degradation and temperature extremes.

Symptoms of a Failing 808492 Fuel Pump

A bad fuel pump can cause several issues that affect engine performance. If you notice any of these symptoms, it may be time to replace your pump:

Engine Hard Starting or No Start: The most common symptom is difficulty starting the engine. If the pump cannot deliver fuel to the carburetor, the engine simply won't fire.

Engine Stalling: A failing pump may cause the engine to stall after running for a few minutes, especially under load. This happens because the pump cannot maintain consistent fuel pressure.

Loss of Power Under Load: If your mower bogs down when cutting thick grass or climbing hills, the fuel pump may not be delivering enough fuel to meet demand.

Fuel Leaks: Visible fuel leaks around the pump body or fittings indicate a cracked housing or failed diaphragm. This is a safety hazard and requires immediate replacement.

No Fuel in the Carburetor: If you remove the fuel line at the carburetor and crank the engine, you should see fuel pulsing out. If no fuel appears, the pump is likely defective.

How to Install a Replacement 808492 Fuel Pump

Replacing the 808492 fuel pump is a straightforward job that most DIYers can handle in under an hour. Here is a step-by-step guide:

Step 1: Safety First
Work in a well-ventilated area. Drain the fuel tank or clamp the fuel line to prevent fuel spillage. Disconnect the spark plug wire to prevent accidental starting.

Step 2: Locate the Old Pump
The fuel pump is usually mounted near the engine, often on the side of the engine or on a bracket. It will have two or three fuel line connections.

Step 3: Remove the Old Pump
Note the orientation of the fuel lines. Typically, the pump has an inlet from the fuel tank, an outlet to the carburetor, and sometimes a vacuum line connection. Carefully disconnect each line using pliers if necessary. Remove the mounting screws and take off the old pump.

Step 4: Install the New Pump
Attach the new pump using the same mounting screws. Reconnect the fuel lines in the correct orientation. Most pumps have arrows indicating fuel flow direction. Use new fuel line clamps to ensure tight connections.

Step 5: Test the Installation
Reconnect the spark plug wire. Turn the fuel valve on (if equipped). Crank the engine and check for leaks. The engine should start and run smoothly. If it does not start, check that the fuel lines are connected correctly and that there are no air leaks.

Choosing the Right 808492 Fuel Pump: What to Look For

Not all aftermarket fuel pumps are created equal. When selecting a replacement, consider these factors:

Build Quality: Look for pumps with reinforced bodies and high-quality diaphragms. Cheap plastic pumps may crack over time, especially in hot weather.

Compatibility: Verify that the pump matches your engine's horsepower range and fuel line size. A pump designed for 25 HP engines may not work correctly on a 17 HP engine, and vice versa.

Filter Included: Some replacement pumps come with a fuel filter, which is a nice bonus. A clogged filter is a common cause of fuel delivery problems.

Brand Reputation: Stick with well-known brands that have good reviews. HIPA, KEMSO, and Carbhub are among the trusted names in the small engine fuel pump market.

Why You Should Consider KEMSO Fuel Pumps

When it comes to performance, reliability, and value, KEMSO fuel pumps stand out as the best option for anyone looking to upgrade or replace their 808492 pump or any other fuel pump application. KEMSO specializes in high-performance fuel pumps that are designed to exceed OEM specifications while offering exceptional durability.

High Performance: KEMSO fuel pumps are engineered for maximum flow and pressure. Their 340LPH models support up to 600 BHP, making them ideal for high-demand applications like turbocharged engines and performance builds. For lawn and garden equipment, KEMSO offers direct OEM replacement pumps that deliver consistent fuel delivery and reliable starting.

OEM Replacement Quality: KEMSO pumps are built to match or exceed original equipment specifications. Whether you need a pump for your John Deere mower, Briggs & Stratton engine, or Kohler-powered equipment, KEMSO has a precisely engineered solution. Their pumps feature heavy-duty metal construction and serialized bodies for traceability and quality assurance.

Lifetime Warranty: One of the biggest advantages of choosing KEMSO is the lifetime warranty. This warranty covers defects in materials and workmanship, giving you complete peace of mind. KEMSO stands behind their products, and their USA-based support team is available to answer any questions.

Extensive Compatibility: KEMSO offers fuel pumps for a wide range of applications, including cars, trucks, motorcycles, ATVs, UTVs, marine engines, and lawn equipment. Their product line includes both high-performance pumps for modified engines and standard replacement pumps for everyday use.

Easy Installation: KEMSO pumps come with clear instructions and compatible fittings, making installation straightforward. Many pumps are direct replacements, meaning you can swap them in without modifying your existing setup.

If you want a fuel pump that combines performance, reliability, and exceptional customer support, visit the official KEMSO website to explore their full product line: https://www.kemsoracing.com/. Whether you are upgrading your performance vehicle or replacing a worn-out pump on your lawn mower, KEMSO has the right solution for you.

Maintenance Tips for Your Fuel Pump

To extend the life of your 808492 fuel pump, follow these simple maintenance practices:

Use Fresh Fuel: Old or contaminated fuel is the number one cause of fuel pump failure. Use fuel stabilizer if you store equipment for more than 30 days.

Change the Fuel Filter: A clogged fuel filter forces the pump to work harder, reducing its lifespan. Replace the filter annually or as recommended by your equipment manufacturer.

Check for Leaks: Periodically inspect the pump and fuel lines for signs of leakage. Even a small leak can allow air into the system, causing priming issues.

Avoid Ethanol Blends Above 10%: Higher ethanol content can damage the rubber diaphragms and seals in vacuum fuel pumps. Stick with E10 or ethanol-free fuel if possible.

Keep the Pump Clean: Dirt and debris can clog the pump's internal passages. Keep the area around the pump clean and free of grass clippings and mud.

Frequently Asked Questions About the 808492 Fuel Pump

Q: Will the 808492 fit my Kohler CH22S engine?
A: Yes, the 808492 is compatible with Kohler Command engines, including the CH22S. However, always verify your specific engine model number against the pump's compatibility list.

Q: Can I use this pump with ethanol fuel?
A: Yes, but only up to 10% ethanol (E10). Higher ethanol blends can damage the pump's internal components.

Q: How do I know if my fuel pump is bad?
A: Common signs include hard starting, stalling, loss of power, and fuel leaks. You can also test the pump by disconnecting the outlet line and cranking the engine. If no fuel pulses out, the pump is likely defective.

Q: Is the 808492 pump universal?
A: While it fits many engines, it is not truly universal. Always check your engine's horsepower rating and fuel line size to ensure compatibility.

Q: How long does a replacement fuel pump last?
A: With proper maintenance, a quality replacement pump can last 5 to 10 years. Factors like fuel quality, operating conditions, and ethanol content all affect lifespan.

Final Thoughts

Replacing your 808492 fuel pump is a simple and cost-effective way to restore your lawn mower or small engine equipment to peak performance. By understanding the compatibility, installation process, and maintenance requirements, you can avoid costly repairs and downtime.

If you are in the market for a replacement, I strongly recommend checking out KEMSO fuel pumps. Their products offer superior build quality, OEM-level fitment, and a lifetime warranty that protects your investment. Whether you need a standard replacement or a high-performance upgrade, KEMSO has you covered.

For the best selection of fuel pumps for your vehicle, lawn equipment, or performance build, visit https://www.kemsoracing.com/ today. Their team is ready to help you find the perfect pump for your needs, and their USA-based support ensures you get the help you need when you need it.


Back to blog