1. Used Boat Parts
  2. sku: 15044077748486762
  3. MERCRUISER 23-05040

MERCRUISER 23-05040 Emp Thermostat Sleeve Engines 840080494821 10.8 7MM V6 V8

fits year: 2021.

23-05040 Mercruiser 840080494821 Emp Thermostat Sleeve 10.8 X 21 7mm V6 And V8 Engines #23-05040

( Brand: Mercruiser ), ( Part Type: Thermostat Sleeve Engine ), ( UPC: 840080494821 )

Review MERCRUISER Emp Thermostat Sleeve 10.8 7mm V6 And V8 Engines #23-05040 fits 2021

The Mercruiser 840080494821 Emp Thermostat Sleeve is an essential component for maintaining optimal engine temperature in MerCruiser V6 and V8 engines, specifically those with 10.8" (27 cm) cylinder bore and 21" (53.3 cm) stroke, such as the 23-05040 engine. This thermostat sleeve is designed to accommodate 7mm (0.275 inches) thick thermostats.

This thermostat sleeve is manufactured using high-quality materials to ensure durability and longevity in demanding marine applications. It is engineered to fit snugly into the engine block and provides a secure seal to prevent coolant leakage. This design not only helps to maintain consistent engine temperature, but also enhances the overall efficiency of the cooling system.

The Mercruiser 840080494821 Emp Thermostat Sleeve is precision-machined to ensure a perfect fit in the engine block. Its smooth, polished finish helps to minimize friction and wear, reducing the risk of damage to the engine components. The sleeve is also designed with a tapered bore to ensure easy installation and removal of the thermostat.

This thermostat sleeve is an important upgrade for boat owners who are seeking to improve the performance and reliability of their cooling system. It is a direct replacement for the original equipment thermostat sleeve and is designed to provide superior sealing and temperature control.

Installing the Mercruiser 840080494821 Emp Thermostat Sleeve is a straightforward process that can be completed using standard engine repair tools. The included instructions provide clear, step-by-step guidance on how to remove the old sleeve and install the new one. With its high-quality materials and precision engineering, this thermostat sleeve is an excellent investment for any MerCruiser V6 or V8 engine.

In summary, the Mercruiser 840080494821 Emp Thermostat Sleeve is a critical component for maintaining optimal engine temperature and efficiency in MerCruiser V6 and V8 engines with 10.8" (27 cm) cylinder bore and 21" (53.3 cm) stroke. Its high-quality materials, precision engineering, and easy installation make it an excellent value for boat owners seeking to improve their cooling system's performance and reliability.

Mercruiser 840080494821 Emp Thermostat Sleeve: A Worthy Investment?

The Mercruiser 840080494821 Emp Thermostat Sleeve is a crucial component for maintaining optimal engine temperature in MerCruiser V6 and V8 engines. This thermostat sleeve is designed for 10.8-inch (21-inch circumference) cooling systems with a 7mm thickness. In this analysis, we will discuss the potential benefits and drawbacks of purchasing this thermostat sleeve.

Pros:

1. Enhanced Engine Performance: The thermostat sleeve plays a vital role in regulating engine temperature. By keeping the engine at the right temperature, it ensures better combustion efficiency and overall performance.

2. Improved Cooling System Efficiency: The sleeve is designed to provide better heat transfer between the coolant and the engine. This results in a more efficient cooling system, which can help prolong the life of the engine.

3. OEM Quality: This thermostat sleeve is a genuine MerCruiser part, ensuring that it is manufactured to the same high standards as other OEM components.

4. Easy Installation: The sleeve is relatively easy to install, making it a convenient solution for boat owners who prefer DIY projects or want to minimize downtime.

Cons:

1. Cost: Compared to some aftermarket alternatives, the OEM thermostat sleeve can be quite expensive. However, the cost may be justified by the peace of mind that comes with the use of a genuine MerCruiser part.

2. Limited Compatibility: This thermostat sleeve is specifically designed for MerCruiser engines with a 10.8-inch cooling system and a 7mm thickness. It may not be compatible with other engine models or cooling system configurations.

Conclusion:

The Mercruiser 840080494821 Emp Thermostat Sleeve is an essential component for maintaining the optimal performance and longevity of MerCruiser V6 and V8 engines. While it may come with a higher price tag than some aftermarket alternatives, the benefits of using an OEM part, such as enhanced engine performance, improved cooling system efficiency, and ease of installation, make it a worthwhile investment for boat owners.

Recommendation:

If you own a MerCruiser V6 or V8 engine with a 10.8-inch cooling system and a 7mm thickness, the Mercruiser 840080494821 Emp Thermostat Sleeve is a recommended upgrade to ensure the best possible performance and longevity of your engine. It is an investment that can save you time, money, and potential headaches down the line.

Details:

Dimensions: ID 10.8mm OD 21mm width 7mm. The sleeve fits around the thermostat housing and helps direct coolant flow properly through cooling circuit. EMP 23-05040 Oil Seals: This thermostat sleeve is a direct replacement for Mercury/MerCruiser OEM part 23-806922, designed MerCruiser V6 and V8 engines with standard cooling systems from 1987 later. Compatible Applications: MerCruiser V6 and V8 engines with standard cooling 160 thermostat 1987 later.

Seal dimensions are 10.8mm inner diameter, 21mm outer and 7mm width , which the specs to match if you're cross-referencing by size rather than part number.

part #: 840080494821 price

  • $12.07

specifications vesselveep:

  • for years: 2021
  • brand: Mercruiser
  • part type: Thermostat Sleeve Engine
  • upc: 840080494821

payments vesselveep:

  • credit card: Diners-club
  • wallet: Apple-pay
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shipping vesselveep:

  • type: Calculated
  • cost: $10.95
  • class: Standard, Expedited
  • service: USPS Ground Advantage, USPS Priority Mail, UPS Ground
  • transit: 5-12 Days
  • carrier: USPS, UPS

general vesselveep:

  • condition: New
  • Parts Accessories > Boat Parts > Other

seller vesselveep:

  • rating: 99.6%
  • city: Grain Valley, Missouri
  • # reviews: 33571

offer vesselveep:

  • options: Ship-to-home
  • availability: In Stock
  • quantity: 7
  • sold: 0
  • started: May 30, 2026

returns vesselveep:

  • paid by: Seller
  • policy: Returns Accepted
  • time: 30 Days
for years: 2021, part type: thermostat sleeve engine,
sku: 15044077748486762,

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  • New. Offer #1 priced at $12.07 + $10.95 delivery = $23.02* total. EMP Oil Seals.+$10.95 shipping

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