MERCURY 8M0074239 Boat Engine Cylinder Head 4.5 V6
fits model: Marine, 200, Mercruiser. make: Mercury.
( Manufacturer Part Number: 8M0074239 ), ( Part Type: Hp Engine Cylinder Head ), ( Country/region Of Manufacture: United States )
Review MERCURY 4.5 V6 Hp Boat Engine Cylinder Head fits MERCRUISER MARINE 200
The Mercury 8M0074239 Marine Engine Cylinder Head is a high-performance component designed for use with the Mercury Mercruiser 4.5 V6 200 HP outboard engine. This cylinder head is engineered to deliver exceptional power and efficiency, making it an ideal choice for boaters seeking a reliable and powerful engine.
The Mercury 8M0074239 cylinder head is constructed from high-strength aluminum alloy, ensuring durability and lightweight design. It features a compact combustion chamber design, which allows for optimal fuel-air mixture and efficient combustion. The head also incorporates four valves per cylinder, which enhances engine breathing and improves overall engine performance.
The cylinder head is equipped with Mercury's advanced MultiPort Fuel Injection system, which delivers fuel directly to the combustion chamber for precise and efficient combustion. This results in reduced emissions and improved fuel economy, making the engine more eco-friendly and cost-effective to operate.
The Mercury 8M0074239 cylinder head also features advanced coolant flow technology, which ensures optimal engine temperature and longevity. The cooling system includes large, efficient water passages and a thermostat that regulates coolant temperature for optimal engine performance.
Additionally, the cylinder head includes Mercury's exclusive Dual Knock Sensing system, which monitors engine knock and adjusts ignition timing to prevent damage and ensure optimal engine performance. This system also helps to reduce emissions and improve fuel economy.
In summary, the Mercury 8M0074239 Marine Engine Cylinder Head is a high-performance component designed for use with the Mercury Mercruiser 4.5 V6 200 HP outboard engine. It is engineered to deliver exceptional power and efficiency, with features including a compact combustion chamber design, advanced MultiPort Fuel Injection system, coolant flow technology, and Dual Knock Sensing system. This cylinder head is an excellent choice for boaters seeking a reliable and powerful engine for their watercraft.
Mercury 8M0074239 Marine Engine Cylinder Head: A Detailed Analysis
The Mercury 8M0074239 cylinder head is a crucial component of the Mercruiser 4.5 V6 200 HP marine engine. In this analysis, we will discuss the key features, advantages, and potential drawbacks of this cylinder head to help you make an informed purchasing decision.
1. Design and Build:The Mercury 8M0074239 cylinder head is engineered for high-performance applications. It features a sophisticated four-valve design, which enhances engine breathing, improves combustion efficiency, and ultimately leads to increased power output and better fuel economy.
Advantage: The four-valve design allows for optimal fuel-air mixture and more efficient exhaust gas expulsion, resulting in better overall performance.
2. Material and Durability:The Mercury 8M0074239 cylinder head is constructed from high-strength aluminum alloy. This material is known for its excellent heat dissipation properties, making it an ideal choice for marine applications where engines are frequently subjected to high temperatures.
Advantage: The lightweight yet robust aluminum alloy construction ensures efficient heat transfer and increased durability, extending the engine's service life.
3. Emissions Compliance:This cylinder head is designed to meet the stringent emissions requirements of various regulatory bodies, such as the Environmental Protection Agency (EPA) and the European Union (EU).
Advantage: Compliance with emissions regulations ensures that your marine engine operates efficiently while minimizing its impact on the environment.
4. Potential Challenges: Although the Mercury 8M0074239 cylinder head offers numerous benefits, it may come with some potential challenges, such as:- Cost: Given its high-performance design and advanced features, the cylinder head may come with a higher price tag compared to standard marine engine components.
- Installation: Installing this cylinder head may require specialized skills and tools, potentially leading to additional costs for professional installation or machinery rental.
Conclusion:The Mercury 8M0074239 cylinder head is a top-performing component in the Mercruiser 4.5 V6 200 HP marine engine. Its four-valve design, lightweight yet robust aluminum alloy construction, and emissions compliance make it an attractive choice for boat owners seeking maximum power and efficiency. However, its higher cost and potential installation challenges are important considerations.
Recommendation:If you are an avid boater, competitive racer, or simply looking for a high-performance marine engine, the Mercury 8M0074239 cylinder head is a worthwhile investment. Its advanced features and benefits can significantly enhance your boating experience. However, if you are operating on a tight budget or prefer a more straightforward engine solution, you may want to consider alternative cylinder head options. Ultimately, the decision depends on your specific needs and priorities.
Details:
Please look at all pictures and read entire before buying. I will do my best to resolve the issue. Condition: Good used condition. What you see in the pictures is what get.
Look at pictures closely and ask any questions, I try to describe parts as best can. Shelf 26-9-1-D. Mounting hardware is only included if it shown in the pictures. Part was removed from a 4.5L 200 Hp MerCruiser Marine engine.
Thanks -Mike.
part #: 8m0074239 prices
- $160.00-$664.05
specifications otsterndriv:
- for models: Marine, 200, Mercruiser
- for makes: Mercury
- mpn: 8m0074239
- part type: Hp Engine Cylinder Head
- country/region of manufacture: United States
returns otsterndriv:
- policy: Returns Accepted
- paid by: Buyer
- time: 30 Days
offer otsterndriv:
- quantity: 2
- options: Ship-to-home
- availability: In Stock
- started: September 9, 2025
- sold: 0
seller otsterndriv:
- city: Huron, Ohio
- rating: 99.2%
- # reviews: 107389
general otsterndriv:
- condition: Used
- Boat Parts > Sterndrive Motors Components > Other
shipping otsterndriv:
- service: FedEx Ground / FedEx Home Delivery, UPS Ground, USPS Ground Advantage, FedEx 2Day
- class: Standard, Expedited
- cost: $39.91
- carrier: FedEx, UPS, USPS
- transit: 2-6 Days
- type: Calculated
payments otsterndriv:
- wallet: Paypal
- other
- credit card: Mastercard
Mercury 8M0074239 Is Similar To:
- 862365 Mercury Mercruiser Mag Horizon Ho Engine Cover Like New Near (52.4% similar) Decals are in great condition. A few small scratches. In great near perfect condition...(October 14th, 2018)
- 10-35366 Mercury Mercruiser Stern Drive Engine Screw (52.7% similar) New oem part...(October 25th, 2018)
- 10-42253 Mercury Mercruiser Alpha Bravo Stern Drive Pivot Bolt (34.5% similar) Ii 0D469859 thru 0F679999 mercruiser alpha one gen. Cat new oem part. Mercury pivot bolt this bolt is for use on various mercruiser stern drives. Feel free to call and order. Ii 0F680000 thru 0K999999 mercruiser alpha one gen. Fits:alpha one gen...(September 29th, 2018)
- 10-49956 Quicksilver Mercury Mercruiser Bravo Alpha Oil Pan Drain Screw (35.1% similar) Quicksilver drain screw for use on many mercruiser, bravo alpha stern drive engines. Over 100 mercruiser stern drives use this oil pan drain plug...(October 1st, 2018)
- 10-59645 Quicksilver Mercury Mariner Mercruiser Alpha Bravo Screw (35.2% similar) New oem part. 750FOR various mercury mariner outboard and mercruiser stern drive engines. Quicksilver screw...(October 23rd, 2018)
- 10-805611 Quicksilver Mercury Mercruiser Bravo Manifold Bolt (42.3% similar) 4l related part numbers: number quicksilver bolt for use on 4l V-8 gm mercruiser bravo ii stern drive engines from mercury 2 v8...(October 7th, 2018)
- 105255 Mercruiser Mercury Trim Tilt Pump Solenoid (31.7% similar) It is in good working condition. It comes as pictured. Trim pump this is a used mercruiser with 1 solenoid as pictured. The return line hole appears to be stripped, see pictures...(September 30th, 2018)
- 105921 Mercury Power Trim Pump Works Tested Mercruiser (30.5% similar) Good used condition working order...(January 23rd, 2019)
- 105932 Mercury Power Pump Mercruiser Sterndrive (40.3% similar) ...(October 20th, 2018)
- 11-32522 Mercury Pack Of Mercruiser Vintage Gimbal Splined Nut (46% similar) Part number mercury marine splinted screw nut transom plate to gimbals housing new oem factory that is now obsolete. For use on vintage mercruiser stern drive engines from fits: I thru IA Ibo ICC package of...(February 18th, 2019)
- 11-41527t 41527 Mercury Mercruiser Alpha Stern Drive Nut Nla (36.5% similar) For use on mercruiser stern drive engines from fits: alpha one SS all thru none SAM ii iii iv v trs up cat mercury marine lock nut new oem factory part that is now obsolete...(October 6th, 2018)
