POLARIS 5631801-5631800 Lower Engine 5631801/5631800

( Manufacturer Part Number: 5631801/5631800 ), ( Part Type: Engine Case )

Review POLARIS 5631801/5631800 Lower Engine Case fits DRAGON 800 2009

Introducing the Polaris 2009 Dragon 800 Lower Engine (Part Numbers: 5631801 and 5631800), a powerful and efficient component designed for Polaris ATVs and Side-by-Sides. This lower engine is a key part of your vehicle's powertrain, and it's engineered to deliver exceptional performance and reliability.

The Polaris 2009 Dragon 800 Lower Engine is a liquid-cooled, SOHC (Single Overhead Camshaft) design that utilizes four valves per cylinder. It boasts a displacement of 795cc and is fueled by electronic fuel injection, ensuring optimal power and fuel efficiency. The engine features a 96mm bore and a 72.4mm stroke, while the compression ratio is a robust 9.5:1.

The lower engine is equipped with a high-output alternator that generates 35 amps of charging power, ensuring your battery stays charged during long rides. It also incorporates a convenient electric fan to help maintain optimal operating temperatures. The engine's oil cooler ensures that the lubricating fluid stays at the right temperature, preventing engine wear and extending the life of the engine.

The Polaris 2009 Dragon 800 Lower Engine is designed to be easy to maintain. It has a spin-on oil filter and a removable dipstick, making oil changes quick and convenient. The engine also comes with a convenient air filter access, allowing for easy maintenance and replacement.

The lower engine's durable design includes a powder-coated cylinder head and a cast-iron cylinder liner. The engine features a heavy-duty crankshaft, forged pistons, and a high-strength connecting rod, all contributing to its impressive power and reliability.

In summary, the Polaris 2009 Dragon 800 Lower Engine (Part Numbers: 5631801 and 5631800) is a high-performing, efficient, and durable component that's essential for your Polaris ATV or Side-by-Side. Its liquid-cooled, SOHC design, electronic fuel injection, and robust features make it a reliable workhorse that can handle the demands of off-road riding while providing excellent power and fuel efficiency.

Buying a Polaris 2009 Dragon 800 lower engine (model numbers 5631801 and 5631800) can be a good investment for individuals who own a Polaris ATV or snowmobile with this engine model. Here are some potential pros and cons to consider before making a purchase.

1. Availability: If your current Polaris engine is damaged or no longer functioning, buying a replacement engine can help get your vehicle back on the road or trail.

2. Cost-effective: Replacing an entire ATV or snowmobile can be expensive. Buying a new or rebuilt engine may be a more cost-effective option in the long run.

3. Performance: A new or rebuilt engine can provide better performance and fuel efficiency compared to an old or worn-out engine.

4. Reliability: A rebuilt engine can offer improved reliability compared to a used engine, as it has been inspected, repaired, and tested to ensure it meets manufacturer specifications.

1. Cost: A new or rebuilt engine can be expensive, especially compared to the cost of repairing smaller engine issues.

2. Installation: Installing a new engine can be a complex and time-consuming process, requiring specialized tools and knowledge. Some people may prefer to hire a professional to do the installation.

3. Compatibility: It's important to ensure that the engine is compatible with your specific Polaris model and year. Using an incompatible engine can lead to performance issues and potential damage to the vehicle.

Buying a Polaris 2009 Dragon 800 lower engine (model numbers 5631801 and 5631800) can be a worthwhile investment for Polaris owners with damaged or malfunctioning engines. While the cost and installation process can be daunting, the potential performance and reliability benefits can make it a cost-effective solution in the long run. It's essential to ensure that the engine is compatible with your specific Polaris model and year before making a purchase.

If you're considering buying a new or rebuilt Polaris 2009 Dragon 800 lower engine, I would recommend doing your research first. Look for reputable sellers, compare prices, and read reviews from other customers to ensure that you're getting a high-quality engine that will meet your needs and budget. Additionally, consider hiring a professional to install the engine to ensure that it's done correctly and efficiently.

Details:

Had a repair done and tested by bike man performance. Clean case in nice shape 2009 Polaris Dragon 800 Lower Engine Case.

part #: 56318015631800 prices

• $499.00-$1899.99

specifications enginesnowmobile:

• for models: 800, Dragon
• for makes: Polaris
• for years: 2009
• mpn: 5631801/5631800
• part type: Engine Case

shipping enginesnowmobile:

• type: Fixed
• service: USPS Ground Advantage
• carrier: USPS
• cost: $25.00
• class: Standard
• transit: 4-8 Days

payments enginesnowmobile:

• credit card: Discover
• wallet: Apple-pay
• other

offer enginesnowmobile:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1
• started: March 15, 2026

general enginesnowmobile:

• Snowmobile Parts > Engines Components > Snowmobile Engine Components
• condition: Used

seller enginesnowmobile:

• rating: 100.0%
• # reviews: 125
• city: Clear Lake, Wisconsin

returns enginesnowmobile:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer

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