MERCURY 431370 Kohler Core Cylinders Snotwister K440-2RS

( Manufacturer Part Number: 431370 ), ( Part Type: Cylinder )

Review MERCURY Kohler Core Cylinders Snowmobile Snotwister fits 1975

Mercury 431370 1975 Kohler K440-2RS Core Carburetor Sno-Twister

The Mercury 431370 1975 Kohler K440-2RS Core Carburetor, also known as the Sno-Twister, is a classic marine carburetor designed specifically for Mercury outboard engines. This carburetor is a rebuildable core unit, making it an excellent choice for boat enthusiasts seeking to restore their vintage Mercury engines.

The K440-2RS Core Carburetor is a 2-barrel, 40mm carburetor with a rich history in the boating industry. Its unique design provides optimal fuel mixture for Mercury outboard engines, ensuring reliable and efficient performance. This carburetor is compatible with Mercury outboard engines produced between 1974 and 1976, featuring the Kohler K440-2 engine.

The Sno-Twister's core includes all essential components, including the float bowls, jets, needles, and gaskets. These parts are essential for proper fuel mixture formation and engine operation. The carburetor's needle and jet configurations are specifically designed for Mercury applications, ensuring accurate fuel delivery and optimal engine performance.

The Mercury 431370 1975 Kohler K440-2RS Core Carburetor is a rebuildable unit, allowing users to rebuild and refine the carburetor to meet their specific engine requirements. This provides an opportunity to customize the carburetor for various operating conditions, such as altitude, temperature, and engine modifications.

Rebuilding the Sno-Twister core requires a set of specialized tools and knowledge of the carburetor's internal components. Mercury offers a comprehensive rebuild kit (part number 431371) that includes all necessary components for a successful rebuild. This kit contains new needles, jets, gaskets, and float bowls, ensuring a high-quality rebuild.

In conclusion, the Mercury 431370 1975 Kohler K440-2RS Core Carburetor, or Sno-Twister, is a valuable addition for Mercury outboard engine enthusiasts seeking to restore their vintage engines to their former glory. This rebuildable core unit provides an opportunity to customize the carburetor for optimal engine performance while preserving the classic look and feel of a Mercury outboard.

Mercury 431370, also known as the Kohler K440-2RS core cylinders for the Sno-Twister snowblower, is a crucial component for maintaining the performance and functionality of your snowblower. Here are some pros and cons that can help you decide whether to purchase this part:

1. Improved Performance: A new cylinder can enhance the overall performance of your snowblower by ensuring proper suction and discharge of snow.

2. Better Snow Clearing: The new cylinder can help in clearing snow more efficiently and effectively, especially during heavy snowfall.

3. Increased Lifespan: Replacing a worn-out cylinder can increase the lifespan of your snowblower and save you from costly repairs in the future.

4. Smoother Operation: A new cylinder can result in smoother operation, reducing the strain on other components and providing better control while operating the snowblower.

1. Cost: The Mercury 431370 Kohler K440-2RS core cylinder can be an expensive replacement, especially for those on a tight budget.

2. Installation: Installing a new cylinder can be a time-consuming and complex process, requiring some mechanical skills and knowledge.

3. Availability: Depending on the location and availability, it may take some time to find and purchase this specific part for your snowblower.

In conclusion, the Mercury 431370 Kohler K440-2RS core cylinder is an essential component for maintaining the performance and functionality of your Sno-Twister snowblower. While it may come with a higher cost and installation complexity, the improved performance, better snow clearing, increased lifespan, and smoother operation make it a worthwhile investment.

If you are experiencing issues with your snowblower's performance, such as reduced suction or difficulty in clearing snow, then investing in a new Mercury 431370 Kohler K440-2RS core cylinder may be the best solution. To ensure a smooth installation process, consider seeking assistance from a professional mechanic or following detailed instructions from the manufacturer. Additionally, it's recommended to purchase this part from a trusted supplier to ensure its authenticity and quality.

Details:

Please see photos for condition. They have not been ported. No broken fins, nice studs. Both will need to be replanted, chrome is chipping and has damage.

The manufacturer part number is 4313704. A set of two core cylinders for a 1975 Kohler K440-2RS engine used in Mercury Sno twister.

part #: 431370 prices

• $149.99-$599.99

specifications enginesnowmobile:

• for makes: Mercury
• for years: 1975
• mpn: 431370
• part type: Cylinder

payments enginesnowmobile:

• wallet: Google-pay
• credit card: Diners-club
• other

seller enginesnowmobile:

• # reviews: 212
• rating: 100.0%
• city: Greenville, Wisconsin

general enginesnowmobile:

• condition: For parts or not working
• Snowmobile Parts > Engines Components > Snowmobile Engine Components

offer enginesnowmobile:

• started: October 23, 2025
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

shipping enginesnowmobile:

• class: Expedited
• carrier: USPS
• type: Calculated
• transit: 4-9 Days
• cost: $15.58
• service: USPS Priority Mail

returns enginesnowmobile:

• policy: No Returns

Mercury 431370 Is Similar To:

• 3544772 Mercury Vintage Hurricane Snowmobile (39.7% similar) Buyer has to arrange pick-up. This motor did run 15 years ago. Has electric start. Motor weighs 65 lbs. I have pick-up only. Motor turns over freely...(April 2nd, 2017)
• Mercury 754-6259a2 7617a2 Mk1 mk2 Snowmobile Piston Nla (47.2% similar) Mercury piston, this piston is for use on some vintage MK1/MK2 snowmobile engines. This part is from old stock. Brand: mercury. Mpn: 754-6259A2. New factory part, old stock. Condition: new other. Part number 754-6259A2. Related part numbers: 7617A2, 4620A2, 5328A2...(April 29th, 2025)
• Kohler 44-153-03 Rupp Mercury Crankcase O-ring Set Of 4 44-153-03 (26.1% similar) Krupp mercury kohler crankcase o-ring set of 4 #44-153-03...(July 25th, 2025)
• Mercury 24-57118a1 Vintage Snowmobile Rewind Spring (45.5% similar) Please view all photos before buying. May also fit other years or model's of mercury snowmobiles, great restoration piece. These parts are getting harder to find. Fits 1970 mercury 250. You are buying on a nos mercury 24-57118A1REWIND spring. Note: may have slight shelf wear...(December 6th, 2025)
• Mercap 66233 31-66233 Mercury Ccw 440 22 Snowmobile Wrist Pin Caged Needle Bearing (39% similar) Brand: Mercado. This sale is for one new mercury snowmobile wrist pin bearing. New oem part. Mercury part number: 66233, 31-66233, this wrist pin bearing is for use on vintage ski snowmobile cc 440/22 engines. Condition: new...(May 11th, 2026)