129457-49801 YANMAR Thermostat

Review YANMAR Genuine Thermostat 82c

The Yanmar 129457-49801 thermostat is an essential component for maintaining the optimal operating temperature in Yanmar 4TNE88 and 4TNV84T diesel engines. Designed specifically for these engine models, this thermostat ensures efficient engine cooling and helps prolong the engine's lifespan.

This thermostat features an 82 C (180 F) temperature rating, which is ideal for the specific temperature requirements of the 4TNE88 and 4TNV84T engines. It is constructed of high-quality materials, including a durable stainless steel housing and a temperature-sensitive element made of advanced thermostat material.

The Yanmar 129457-49801 thermostat is designed to open and close at specific engine temperatures to maintain an efficient cooling system. When the engine coolant temperature reaches the desired threshold, the thermostat opens, allowing coolant to circulate through the engine and radiator. Once the engine temperature drops, the thermostat closes, preventing coolant from flowing excessively and wasting engine power.

This thermostat also includes a built-in bypass valve that ensures adequate engine cooling during cold start-up conditions. The bypass valve allows coolant to bypass the thermostat and flow directly to the engine and radiator, helping the engine warm up faster and more efficiently.

Installation of the Yanmar 129457-49801 thermostat is straightforward and can be completed with common hand tools. The thermostat comes with a gasket to ensure a proper seal and prevent coolant leaks. It is recommended to replace the thermostat during routine engine maintenance to ensure optimal engine performance and longevity.

In summary, the Yanmar 129457-49801 thermostat is a high-quality, temperature-sensitive component designed specifically for the Yanmar 4TNE88 and 4TNV84T diesel engines. It ensures efficient engine cooling, prolongs engine lifespan, and includes a built-in bypass valve for optimal cold start-up performance. Replacement of this thermostat during routine maintenance is essential for maintaining optimal engine performance and longevity.

The Yanmar 129457-49801 thermostat is a replacement part designed for Yanmar 4TNE88 and 4TNV84T engines. Here are some potential pros and cons of buying this part:

1. OEM (Original Equipment Manufacturer) part: This thermostat is manufactured by Yanmar, ensuring a perfect fit and function for your engine.

2. Improved engine performance: A faulty thermostat can cause poor engine performance, including overheating, misfiring, and decreased fuel efficiency. Replacing it with a new one can help restore optimal engine performance.

3. Preventing costlier repairs: A malfunctioning thermostat can lead to more significant engine damage, potentially requiring expensive repairs. By replacing the thermostat proactively, you can save money in the long run.

1. Cost: The Yanmar OEM thermostat may be more expensive than aftermarket alternatives. However, the peace of mind and guaranteed fit and function may outweigh the cost difference for some.

2. Installation complexity: Installing a thermostat may require some mechanical knowledge and skills. If you're not confident in your abilities, you may need to hire a professional mechanic, which can add to the overall cost.

In conclusion, the Yanmar 129457-49801 thermostat is an essential replacement part for Yanmar engines. It ensures optimal engine performance, prevents costlier repairs, and is a guaranteed fit. However, its cost and installation complexity may be drawbacks for some. Ultimately, the decision to purchase this part depends on your personal priorities, budget, and mechanical expertise. If you value the peace of mind and guaranteed performance that comes with an OEM part, the investment in the Yanmar thermostat is worthwhile.

Details:

Genuine 1 Yanmar thermostat 82c, compatible with 4TNE88, 3tnv88, 4tnv88, 4TNV84T, 4tnv88-DWI, and 4tnv88-Xmas industrial engines.

specifications watercraftimp:

• brand: Yanmar
• mpn: 129457-49801
• sub-type: Cooling System Parts
• engine type: Canal Boat Engine
• type: Engine Parts
• country/region of manufacture: Japan

payments watercraftimp:

• cash
• credit card: diners-club
• wallet: google-pay
• other

offer watercraftimp:

• started: october 10, 2025
• in stock #: 4
• availability: in stock
• options: ship-to-home
• prices: $44.99–$66.87
• item condition: New
• sold #: 18

returns watercraftimp:

• paid by: seller
• time: 30 days
• policy: returns accepted

seller watercraftimp:

• rating: 99.6%
• city: jacksonville, florida
• # reviews: 15536

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

shipping watercraftimp:

• class: standard, expedited
• service: standard envelope for eligible items up to $20, usps ground advantage, ups 2nd day air, usps priority mail
• carrier: send, usps, ups
• transit: 6-12 days
• type: fixed