WINDEROSA 7145-W306131-35 Vertex Crankshaft Oil Seal Ski Doo

( Brand: Winderosa ), ( Manufacturer Part Number: 7145-W306131-35 ), ( Part Type: Oil Seal Crankshaft )

Review WINDEROSA Vertex Crankshaft Oil Seal Ski doo Snowmobile fits TNT 440 1973–1975

Introducing the Winderosa 7145-W306131-35 Vertex Crankshaft Oil Seal, specifically designed for Ski-Doo TNT 440 models manufactured between 1973 and 1975. This oil seal is an essential component of the engine's crankshaft assembly, tasked with preventing oil leaks and ensuring the efficient operation of the engine.

The Winderosa 7145-W306131-35 is meticulously engineered using high-quality materials to ensure a perfect fit and durability. The seal itself is made of a flexible, oil-resistant rubber compound that effectively seals the gap between the crankshaft and the engine housing. The outer edge of the seal is reinforced with a robust metal lip that provides additional protection against oil pressure and prevents any potential leakage.

This particular oil seal features a unique design that allows it to accommodate the specific dimensions and contours of the Ski-Doo TNT 440 engine. Its cross-section is tapered, which enables a snug fit and minimizes the risk of oil leaks. The seal's diameter measures 35mm, making it suitable for engines with this size crankshaft.

Installation of the Winderosa 7145-W306131-35 is straightforward, requiring no special tools or extensive mechanical knowledge. Simply remove the old oil seal, clean the area, and carefully install the new one, ensuring that it is properly aligned and seated. Once installed, the new oil seal will help prevent oil leaks, reduce engine noise, and improve overall engine performance.

In conclusion, the Winderosa 7145-W306131-35 Vertex Crankshaft Oil Seal is an essential upgrade for any Ski-Doo TNT 440 owner from the 1973 to 1975 model years. This high-quality, precision-engineered component is designed to provide a reliable seal against oil leaks, ensuring efficient engine operation and reducing the need for costly repairs.

Pros and Cons of buying a Winderosa 7145-W306131-35 Vertex Crankshaft Oil Seal for 1973-1975 Ski-Doo TNT 440

a. Compatibility: This oil seal is designed specifically for the 1973-1975 Ski-Doo TNT 440 models, ensuring a precise fit and optimal performance.

b. OEM Quality: Winderosa is a trusted brand known for manufacturing high-quality OEM (Original Equipment Manufacturer) parts, including crankshaft oil seals.

c. Durability: The Winderosa 7145-W306131-35 oil seal is engineered to withstand the rigors of snowmobiling, providing long-lasting protection against oil leaks.

d. Easy Installation: The oil seal comes with clear installation instructions, making it an ideal choice for DIY enthusiasts or small repair shops.

a. Price: Compared to aftermarket alternatives, the Winderosa crankshaft oil seal may be pricier. However, the investment in OEM quality may prove worthwhile in the long run.

b. Availability: Depending on your location, this specific part might not be readily available at local parts stores. You may need to order it online or from a specialized dealer.

The Winderosa 7145-W306131-35 crankshaft oil seal for the 1973-1975 Ski-Doo TNT 440 offers several advantages, including compatibility, OEM quality, durability, and easy installation. While the price may be a concern, the investment in a genuine Winderosa part can provide peace of mind and long-term performance benefits. If you prioritize the reliability and functionality of your snowmobile, the Winderosa oil seal is a recommended choice.

Details:

Parts without fitment are to be assumed universal and may require vehicle modification. I need to exchange an item. Compatibility: Years: Make: model: Application: Notes: 1974 - 1975Ski-Olympic 300S, 1975 300T, 1973 1973Ski-Olympic 340 Early 1973, 1975Ski-Doo TNT 340, 1974Ski-Olympic 4 340E, 400 300S 440, 400E, 340E 440 400E. This is helpful if you are buying multiple items.

Brand: Winderosa, model Number: 7145-W306131-35.

part #: 7145w30613135 price

• $11.53

specifications enginesnowmobile:

• for models: Tnt, 440
• for makes: Ski-doo
• for years: 1973-1975
• brand: Winderosa
• mpn: 7145-w306131-35
• part type: Oil Seal Crankshaft

returns enginesnowmobile:

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

payments enginesnowmobile:

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

seller enginesnowmobile:

• rating: 99.8%
• city: San Marcos, CA
• # reviews: 73805

general enginesnowmobile:

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

offer enginesnowmobile:

• started: December 30, 2025
• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 9

shipping enginesnowmobile:

• transit: 4-8 Days
• type: Fixed
• cost: $0.00
• service: Standard
• class: Standard

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