3.0L GM High Output Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1991-newer. Replaces Mercruiser 938-8M0115135
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3.0L GM High Output Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1991-newer. Replaces Mercruiser 938-8M0115135
New aftermarket complete cylinder head with valves and springs for 3.0L marine engines years 1991-newer.
3.0L GM High Output Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1991-newer. Replaces Mercruiser 938-8M0115135
Item #: 18781140

3.0L GM High Output Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1991-newer. Replaces Mercruiser 938-8M0115135

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Item #: 18781140
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New aftermarket complete cylinder head with valves and springs for 3.0L marine engines years 1991-newer.
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What Stands Out

High Output Performance
Designed for superior performance, this 3.0L engine head enhances power output and efficiency, ensuring an exhilarating boating experience essential for marine enthusiasts and professionals.
Direct Fit Replacement
Specifically engineered to replace Mercruiser and Volvo Penta applications post-1991, it ensures a hassle-free installation process, saving time and additional costs on modifications for boat owners.
Durable Construction
Built with high-quality materials, this cylinder head offers longevity and reliability, effectively resisting corrosion and wear, which is crucial for sustaining performance in marine environments.

Product Details

Shop 3.0L GM High Output Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1991-newer. Replaces Mercruiser 938-8M0115135 online at a best price in Turks and Caicos. B07N8H287P
  • Brand new aftermarket complete cylinder head with valves and springs
  • Replaces Mercruiser, Volvo Penta, OMC, Marine Power, GM Marine 3.0L engines from 1991-newer
  • Replaces Mercruiser part numbers 938-8M0115135, 809891, 810849
  • Replaces Volvo Penta part number 3854012
  • Replaces GM part number 10140599
  • Direct replacement for 3.0L marine engines from 1991-newer, including LX models

Who Should Buy?

Suitable For
  • Boat Owners

    Ideal for boat owners needing a reliable replacement for their 3.0L Mercruiser or Volvo Penta engine components.

  • Marine Mechanics

    A great choice for marine mechanics looking to upgrade cylinder heads on compatible engine models for improved performance.

  • Engine Upgraders

    Perfect for those seeking higher output and efficiency from their marine engines within the specified compatibility range.

Not Suitable For
  • Older Engine Models

    Not suitable for engine models prior to 1991 as it is specifically designed for newer applications only.

Product Description

3.0L GM High Output Marine Engine Cylinder Head. Replaces Mercruiser & Volvo Penta applications years 1991-newer. Replaces Mercruiser 938-8M0115135

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Customer Questions & Answers

  • Question: What is the compatibility of the 3.0L GM High Output Marine Engine Cylinder Head?

    Answer: The 3.0L GM High Output Marine Engine Cylinder Head is designed to replace components in various Mercruiser and Volvo Penta applications from 1991 onwards. This compatibility makes it an ideal replacement for a range of marine engines, ensuring optimal performance and reliability. When selecting a replacement head, it's crucial to verify your specific engine model and configuration to ensure proper fitment and functionality, especially for enhancing performance in high-demand situations like racing or heavy use.
  • Question: Can I install the cylinder head myself, or should I hire a professional?

    Answer: While installing the 3.0L GM High Output Marine Engine Cylinder Head can be done by a skilled DIY enthusiast, it's recommended to seek professional installation if you're not experienced with marine engines. Proper installation is critical to ensure durability and functionality. Professionals have the required knowledge to handle any complications that may arise and can offer insights on optimizing engine performance. DIY enthusiasts might find available guides, but always cross-reference with manufacturer specifications for best results.
  • Question: What makes the 3.0L GM High Output Cylinder Head a preferred choice?

    Answer: The 3.0L GM High Output Cylinder Head is favored for its superior engineering and reliability. It provides excellent thermal efficiency and enhances engine performance by improving airflow and combustion. This is particularly beneficial for those who frequently use their boats in demanding conditions, as it helps maintain power while reducing the risk of overheating. Choosing this cylinder head can significantly impact the longevity of your marine engine, making it a smart investment for serious boaters.
  • Question: What should I check before purchasing the cylinder head?

    Answer: Before purchasing the 3.0L GM High Output Marine Engine Cylinder Head, ensure to check your existing engine specifications, including the current model and any existing modifications. It's important to measure the existing cylinder head dimensions and verify compatibility with your Mercruiser or Volvo Penta setup to avoid any fitting issues. Additionally, consider the type of boating you do, as this may influence your choice towards turbo or high-performance setups for specific needs.
  • Question: What materials are used in the construction of this cylinder head?

    Answer: The 3.0L GM High Output Marine Engine Cylinder Head is typically made from high-strength aluminum alloy, which provides excellent durability and heat dissipation. This material selection helps to cope with the harsh marine environment, reducing the likelihood of corrosion and ensuring a longer lifespan. Using lightweight and robust materials contributes to improved overall engine performance, especially in demanding maritime conditions, making it suitable for both recreational and professional applications.
  • Question: Is the cylinder head suitable for high-performance applications?

    Answer: Yes, the 3.0L GM High Output Marine Engine Cylinder Head is specifically designed to support high-performance applications. Its improved design enhances airflow and combustion efficiency, which is essential for boosting horsepower and torque. This makes it a favored choice for racing or water sports enthusiasts looking to extract maximum performance from their marine engines. If you plan on pushing your boat's performance potential, upgrading to this cylinder head can optimize your engine's capabilities.
  • Question: What are the common signs of a failing engine cylinder head?

    Answer: Common signs of a failing engine cylinder head include coolant leaks, engine overheating, white smoke from the exhaust, and reduced engine performance. If you notice any of these symptoms, it may indicate issues with the cylinder head or head gasket. Addressing these issues promptly with a replacement, like the 3.0L GM High Output Marine Engine Cylinder Head, can help restore your engine's functionality. Regular maintenance checks can aid in early detection to prevent significant marine engine damage.
  • Question: Can this cylinder head improve fuel efficiency?

    Answer: Yes, installing the 3.0L GM High Output Marine Engine Cylinder Head can lead to improved fuel efficiency due to its well-optimized airflow and combustion capabilities. This efficiency reduction in fuel consumption is particularly beneficial for longer trips or eco-conscious boaters. When paired with a properly tuned engine and maintained systems, this head can help you maximize your boating experience while minimizing fuel costs, making it advantageous for recreational boaters and professionals alike.
  • Question: Where can I buy the 3.0L GM High Output Marine Engine Cylinder Head?

    Answer: You can buy the 3.0L GM High Output Marine Engine Cylinder Head at Ubuy in Turks and Caicos. Ubuy offers a variety of options for marine engine parts, ensuring you can find the right component for your needs. Their platform makes it straightforward to browse through compatible products, read customer reviews, and find additional resources that may assist in your purchase decision. This convenience helps streamline your shopping experience while focusing on quality marine engine components.
  • Question: What are the torque specifications for installing the cylinder head?

    Answer: The torque specifications for the 3.0L GM High Output Marine Engine Cylinder Head installation can usually be found in the engine service manual, and it's crucial to adhere to these guidelines for optimal performance. Typically, the recommended torque pattern is done in stages to ensure an even clamp load. Following the correct specifications is essential to prevent head warping and ensure proper sealing with the gaskets. Failing to comply can lead to engine issues, thus it's advisable to double-check the specifications before installation.

Marine Engines 4 Less Cylinder Heads Editorial Review

3.0L GM High Output Marine Engine Cylinder Head is a top-notch replacement for Mercruiser and Volvo Penta applications from 1991 onward, specifically designed to replace the Mercruiser 938-8M0115135. Reviews highlight its perfect fit and performance in various models, notably the 2003 Volvo Penta 3.0. Users appreciate how easy it is to install, with many noting immediate improvement in engine performance. Practical tips suggest using 3-inch bolts for the water pump during installation. Overall, this marine engine cylinder head offers a reliable solution for those needing an effective replacement without the hassle of extensive repairs.

Customer Reviews & Ratings

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Pros

  • Perfect fit for multiple Volvo Penta models
  • Easy installation with no machining required
  • Pre-assembled with valves and springs
  • Improved engine performance observed
  • Cost-effective alternative to repair services

Cons

  • Minor installation tips may be needed for best results

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Features & Benefits

  • Replacement cylinder head for Mercruiser, Volvo Penta, OMC, and GM marine 3.0L engines.
  • Smaller HO exhaust ports unlike the older pre-1991 cylinder heads.
  • Direct replacement for 3.0L marine engines.
  • Replaces casting #'s: 744, 620 and part numbers: 938-8M0115135, 809891, 810849, 3854012, 10140599.
  • Complete with valves and springs.
  • New aftermarket product.

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