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Pro Marine Cylinder Head Gasket
Mercury Mariner V6 2.4L 150-220HP Cylinder Head Gasket
The Pro Marine 246-1P Cylinder Head Gasket is an aftermarket replacement head gasket for Mercury and Mariner V6 2.4L two-stroke outboards. This gasket replaces Mercury OEM numbers 41246, 41246-1, 41246-2, 41247, 41247T01, and 96543.
This version is commonly used on 2.4L Mercury and Mariner 150HP through 220HP applications including XR4, 175HP, 200HP, and select high-performance 2.4L engines. Always verify the OEM gasket number before ordering.
Compatible Applications
The OEM number family for this gasket is tied to Mercury and Mariner 2.4L V6 applications. Published replacement listings commonly identify this gasket for Mercury / Mariner 150XR4, 175HP, 200HP, and 220HP 2.4L engines using the listed OEM numbers.
| Manufacturer | Application | Notes |
|---|---|---|
| Mercury / Mariner | 150 XR4 V6 2.4L | Commonly listed for 1988-1991 serial range B242885-C239552 |
| Mercury / Mariner | 175HP V6 2.4L | Commonly listed for 1984-1991 serial range 6618751-C239552 |
| Mercury / Mariner | 200HP V6 2.4L | Commonly listed for 1982 and 1983-1991 2.4L applications |
| Mercury / Mariner | 220HP V6 2.4L | Commonly listed for 1987-1988 serial range B117316 & up |
| Mercury / Mariner | 2.4L performance applications | May include select Bridgeport, Black Max, and oval-port 2.4L engines when OEM number matches |
This gasket is for Mercury / Mariner 2.4L V6 applications that use the listed OEM head gasket numbers. Mercury also produced 2.0L and 2.5L V6 engines that may use different head gaskets.
Always match your original OEM number and verify your serial number before ordering.
OEM & Cross Reference Numbers
| Type | Part Number |
|---|---|
| Pro Marine | 246-1P |
| Alternate Pro Marine | 246-1 |
| Mercury OEM | 41246 |
| Mercury OEM | 41246-1 / 412461 |
| Mercury OEM | 41246-2 / 412462 |
| Mercury OEM | 41247 |
| Mercury OEM | 41247T01 |
| Mercury OEM | 96543 |
| Sierra | 18-3862 |
| GLM | 35860 |
| Mallory | 9-63853 |
Also Available in Pro Marine Brand
Pro Marine 246-1 Cylinder Head Gasket
We also stock the Pro Marine 246-1 version of this Mercury / Mariner 2.4L V6 head gasket. It replaces the same Mercury OEM numbers and fits the same application family.
What This Gasket Is Used For
A cylinder head gasket seals the joint between the engine block and cylinder head. It must contain combustion pressure while also sealing cooling passages around the cylinders.
On older Mercury and Mariner V6 2.4L engines, head gaskets are commonly replaced during powerhead rebuilds, cylinder head removal, overheating repairs, or diagnosis of water intrusion and compression loss.
Installation Notes
- Clean and inspect the cylinder head and block sealing surfaces before assembly
- Check for corrosion, pitting, and warpage before installing a new gasket
- Use the correct Mercury service manual torque sequence and torque values
- Inspect head bolts and replace any damaged or questionable hardware
- Each V6 powerhead uses one head gasket per cylinder head
Pro Marine 246-1P Features
- Fits Mercury and Mariner V6 2.4L two-stroke applications
- Commonly used on 150XR4, 175HP, 200HP, and 220HP engines
- Replaces Mercury 41246, 412461, 412462, 41247, 41247T01, and 96543
- Cross references Sierra 18-3862, GLM 35860, and Mallory 9-63853
- Designed for cylinder head service and powerhead rebuilds
- Alternative Pro Marine 246-1 version linked above
FAQ
What OEM numbers does Pro Marine 246-1P replace?
It replaces Mercury 41246, 41246-1, 41246-2, 41247, 41247T01, and 96543.
What engines does this head gasket fit?
It fits many Mercury and Mariner V6 2.4L two-stroke outboards, commonly including
150XR4, 175HP, 200HP, and 220HP applications when the OEM gasket number matches.
Will this fit a Mercury 2.5L V6?
Do not assume fitment on a 2.5L engine. This gasket is for the listed 2.4L OEM
number family. Verify your engine serial number and OEM gasket number first.
Is the 246-1 version available?
Yes. The Pro Marine 246-1 version is linked above as an alternate option.
How many gaskets do I need for both cylinder heads?
Mercury V6 engines use one head gasket per cylinder head, so two are typically
needed if servicing both heads.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Gaskets must be new, unused, and in original packaging.
- Installed gaskets are not returnable.
- Return authorization required before returning merchandise.
Need assistance?
Contact Us
Phone: 941-721-3000
Searchable Terms
246-1P, 246-1, Pro Marine 246-1P, Mercury 41246, Mercury 41246-1, Mercury 412461, Mercury 41246-2, Mercury 412462, Mercury 41247, Mercury 41247T01, Mercury 96543, Sierra 18-3862, GLM 35860, Mallory 9-63853, Mercury V6 2.4L head gasket, Mercury 150 XR4 head gasket, Mercury 175 head gasket, Mercury 200 head gasket, Mercury 220 head gasket, Mariner V6 head gasket, Mercury powerhead gasket
35860
41246
412461
412462
41247
41247T01
9-63853
96543
18786T
187861
187863
35890
9-63856
18-3872
18-3872
35900
41244
41244T02
41245
412451
412452
77671
9-63852
90279
96541
Pro Marine Powerhead Gasket
Mercury Mariner V6 2.4L 150-220HP Cylinder Head Gasket
The Pro Marine 246-1 Cylinder Head Gasket is a replacement head gasket for Mercury and Mariner V6 2.4L outboards. This gasket replaces Mercury OEM part numbers 41246, 41246-1, 41246-2, 41247, 41247T01, and 96543 and is commonly found on 150HP through 220HP V6 applications.
Whether you're rebuilding a powerhead, repairing a cooling system issue, or replacing a leaking cylinder head gasket, the Pro Marine 246-1 is designed to restore proper sealing between the cylinder head and engine block.
Compatible Applications
Mercury OEM numbers 41246, 41246-1, 41246-2, 41247, 41247T01, and 96543 are associated with Mercury and Mariner V6 2.4L outboards. These engines were commonly produced throughout the late 1970s, 1980s, and early 1990s and include numerous fishing, offshore, and performance applications.
| Manufacturer | Common Applications |
|---|---|
| Mercury | 150HP V6 2.4L |
| Mercury | 175HP V6 2.4L |
| Mercury | 200HP V6 2.4L |
| Mercury | XR4 150 V6 |
| Mercury | Bridgeport & High Performance 2.4L Applications |
| Mercury | 220HP V6 Applications |
| Mariner | 150HP-220HP V6 2.4L Models |
Mercury produced multiple V6 engine families including 2.0L, 2.4L, 2.5L and later designs. Always verify your engine serial number and OEM gasket number before ordering.
This gasket replaces Mercury OEM numbers 41246, 41246-1, 41246-2, 41247, 41247T01, and 96543.
OEM & Cross Reference Numbers
| Type | Part Number |
|---|---|
| Pro Marine | 246-1 |
| Mercury OEM | 41246 |
| Mercury OEM | 41246-1 |
| Mercury OEM | 41246-2 |
| Mercury OEM | 41247 |
| Mercury OEM | 41247T01 |
| Mercury OEM | 96543 |
Alternative Pro Marine Version Available
Pro Marine 246-1P Cylinder Head Gasket
We also stock the Pro Marine 246-1P version of this head gasket. It fits the same Mercury and Mariner V6 2.4L applications and is available as an alternative replacement option.
What Does a Cylinder Head Gasket Do?
The cylinder head gasket creates a seal between the cylinder head and engine block. It keeps combustion pressure inside the cylinders while separating cooling passages from the combustion chamber.
A damaged head gasket can result in compression loss, cooling system leaks, water intrusion, overheating, hard starting, or poor engine performance.
When Should a Head Gasket Be Replaced?
- During cylinder head removal
- When repairing overheating damage
- When rebuilding a powerhead
- After detecting water intrusion into a cylinder
- When compression loss indicates gasket failure
Pro Marine 246-1 Features
- Fits Mercury and Mariner V6 2.4L outboards
- Replaces Mercury OEM 41246, 41246-1, 41246-2, 41247, 41247T01 and 96543
- Compatible with 150HP, 175HP, 200HP, XR4 and select 220HP models
- Ideal for powerhead rebuilds and cylinder head repairs
- Designed to maintain proper compression sealing
- Quality aftermarket replacement from Pro Marine
FAQ
What OEM numbers does this gasket replace?
Mercury 41246, 41246-1, 41246-2, 41247, 41247T01, and 96543.
What engines commonly use this gasket?
Mercury and Mariner V6 2.4L engines including many 150HP, 175HP, 200HP, XR4, and 220HP applications.
Will this fit a 2.5L Mercury?
Not necessarily. Mercury used different head gasket designs across the 2.0L, 2.4L, and 2.5L engine families. Verify your OEM part number before ordering.
Do you stock another version?
Yes. We also stock the Pro Marine 246-1P version linked above.
Should head bolts be inspected during replacement?
Yes. Follow Mercury service manual procedures and inspect all fasteners and sealing surfaces during installation.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization required before returning merchandise.
Need assistance?
Contact Us
Phone: 941-721-3000
Searchable Terms
246-1, 246-1P, Mercury 41246, Mercury 41246-1, Mercury 41246-2, Mercury 41247, Mercury 41247T01, Mercury 96543, Mercury V6 head gasket, Mercury 2.4L head gasket, Mercury XR4 head gasket, Mercury 175 head gasket, Mercury 200 head gasket, Mariner V6 head gasket, Pro Marine cylinder head gasket
35860
41246
412461
412462
41247
41247T01
9-63853
96543
822844
822844T04
822844T05
822844004
8228441
8228442
8228443
Genuine Mercury Marine OEM Engine Components
Genuine Mercury 8M0033476 Cylinder Head Gasket for Verado L6 225-300 HP Outboards
The Genuine Mercury 8M0033476 Cylinder Head Gasket is an original equipment manufacturer (OEM) replacement for select Mercury Verado 225, 250, 275, and 300 HP 2.6L Inline 6 (L6) 4-stroke outboard engines.
Manufactured for Mercury Marine applications, this factory replacement gasket is designed to seal the cylinder head to the engine block, helping maintain combustion chamber compression while separating the engine's cooling water and lubrication passages.
Mercury OEM part number 8M0033476 replaces earlier cylinder head gasket number 8M0024564 and cross references 880552007, 895374, 895374002, and 895374006.
This gasket is used during compatible Mercury Verado L6 cylinder head repairs, gasket replacement, and powerhead rebuilding. It is an appropriate choice when a Genuine Mercury factory replacement component is preferred.
Aftermarket Alternative Available: Pro Marine USA also stocks Pro Marine 24564P Cylinder Head Gasket for the same listed applications.
Product Information
- Pro Marine Item Number: 24564
- Manufacturer: Mercury Marine
- Brand: Genuine Mercury OEM
- Mercury OEM Part Number: 8M0033476
- Previous OEM Number: 8M0024564
- Additional Cross References: 880552007, 895374, 895374002, 895374006
- Product Type: Cylinder Head Gasket
- Engine Family: Mercury Verado
- Engine Configuration: Inline 6 Cylinder (L6)
- Displacement: 2.6 Liter
- Engine Type: 4-Stroke Outboard
- Listed Horsepower: 225 HP, 250 HP, 275 HP, 300 HP
- Application: Cylinder Head to Engine Block
- Condition: New
- Aftermarket Alternative: Pro Marine 24564P
OEM and Cross Reference Numbers
Genuine Mercury 8M0033476 is the listed factory replacement for the following Mercury Verado L6 cylinder head gasket part numbers.
| Manufacturer | Part Number | Description |
|---|---|---|
| Mercury Marine | 8M0033476 | Genuine Mercury OEM Cylinder Head Gasket |
| Mercury Marine | 8M0024564 | Previous OEM Part Number |
| Mercury Marine | 880552007 | Earlier Cross Reference |
| Mercury Marine | 895374 | Earlier Cross Reference |
| Mercury Marine | 895374002 | Earlier Cross Reference |
| Mercury Marine | 895374006 | Earlier Cross Reference |
Mercury OEM Replacement Information
Mercury OEM 8M0024564 has been superseded by 8M0033476. If your engine parts diagram references an earlier gasket number, confirm the replacement against your engine serial number before ordering.
What This Part Is Used For
The Mercury Verado L6 cylinder head gasket creates the sealing interface between the cylinder head and engine block.
This gasket helps maintain combustion pressure within the cylinders while preventing cooling water and engine oil from leaking between internal passages.
Genuine Mercury 8M0033476 is used during cylinder head service and compatible Verado L6 engine repairs.
Common Repair Applications
- Mercury Verado L6 cylinder head gasket replacement
- 225 HP Inline 6 Verado engine repairs
- 250 HP Inline 6 Verado engine repairs
- 275 HP Inline 6 Verado engine repairs
- 300 HP Inline 6 Verado engine repairs
- Cylinder head removal and reinstallation
- Repairs involving combustion compression leakage
- Repairs involving cooling water intrusion
- Compatible Mercury Verado powerhead rebuilding
Important Fitment Note
Genuine Mercury 8M0033476 is listed for select Mercury Verado 225, 250, 275, and 300 HP Inline 6 (L6) 4-stroke outboards within the specified serial number ranges.
Mercury manufactured several Verado engine configurations, including Inline 4, Inline 6, V6, V8, and V10 models. Cylinder head gaskets are not interchangeable between all Verado engine families.
Verify your engine horsepower, complete serial number, and required OEM gasket number before ordering.
Compatible Mercury Verado Applications
Genuine Mercury 8M0033476 is listed for select 2.6L Inline 6 Verado outboards in the following horsepower configurations.
| Engine Family | Horsepower | Configuration |
|---|---|---|
| Mercury Verado L6 | 225 HP | 2.6L Inline 6, 4-Stroke |
| Mercury Verado L6 | 250 HP | 2.6L Inline 6, 4-Stroke |
| Mercury Verado L6 | 275 HP | 2.6L Inline 6, 4-Stroke |
| Mercury Verado L6 | 300 HP | 2.6L Inline 6, 4-Stroke |
Mercury Verado L6 Serial Number Fitment
The following serial number ranges are included in the supplied Mercury Verado L6 application data.
| Serial Number From | Serial Number Through | Engine Application |
|---|---|---|
| 1B517434 | 2B144122 | Verado L6 |
| 2B034840 | 2B144122 | Verado L6 |
| 1B830170 | 2B144122 | Verado L6 |
| 2B144123 | 2B577715 | Verado L6 |
| 2B144123 | 2B578935 | Verado L6 |
| 0T980000 | 1B226999 | Verado L6 |
| 1B227000 | 1B381711 | Verado L6 |
| 0P409357 | 0P464487 | Verado L6 |
| 0P520553 | 2B144122 | Verado L6 |
Why Mercury Serial Numbers Matter
Mercury Verado L6 engines were produced in different horsepower ratings and production configurations. Multiple serial number ranges may appear for the same replacement part.
A serial number falling within one of the listed ranges should be checked against the exact engine model and Mercury OEM parts diagram. Serial range alone does not establish compatibility with every Verado engine.
Pro Marine Aftermarket Cylinder Head Gasket Available
Looking for an aftermarket alternative? Pro Marine USA also offers its own replacement cylinder head gasket for the listed Mercury Verado L6 applications.
Pro Marine 24564P - Aftermarket Cylinder Head Gasket
Pro Marine aftermarket replacement cylinder head gasket for select Mercury Verado 225, 250, 275, and 300 HP Inline 6 outboards.
Pro Marine Part: 24564P
Cross Reference: Mercury 8M0033476
Engine Family: Verado 2.6L L6
Brand: Pro Marine Aftermarket
Common Symptoms of a Failed Cylinder Head Gasket
A failed cylinder head gasket can allow combustion gases, engine oil, or cooling water to leak between internal engine passages.
Possible symptoms include:
- Loss of cylinder compression
- Engine overheating
- Cooling water entering the combustion chamber
- Water contamination in engine oil
- Rough idle or engine misfires
- Reduced engine performance
- Difficulty starting
- Combustion gases entering the cooling system
- Visible damage to the original head gasket
These symptoms can have multiple possible causes. Perform appropriate diagnostic testing before determining that the cylinder head gasket requires replacement.
Installation and Service Tips
Replacing a Mercury Verado L6 cylinder head gasket requires removal of the cylinder head and inspection of the engine's sealing surfaces.
Follow the Mercury service manual for your exact engine serial range and configuration.
Recommended Installation Practices
- Confirm the complete Mercury engine serial number.
- Verify that the engine is a compatible 2.6L Inline 6 Verado.
- Confirm the required Mercury OEM gasket number.
- Allow the engine to cool before disassembly.
- Follow the correct cylinder head removal procedure.
- Inspect the cylinder head and block sealing surfaces.
- Check for warpage, cracks, corrosion, and other damage.
- Remove old gasket material without damaging sealing surfaces.
- Keep debris out of cylinders and internal engine passages.
- Install the gasket in the correct orientation.
- Follow Mercury's specified cylinder head tightening sequence.
- Use the correct torque and tightening procedure.
- Replace additional seals or fasteners when required by the service manual.
- Inspect the cooling system for conditions that may have caused the original failure.
- Check engine operation and cooling performance after reassembly.
Important Cylinder Head Installation Warning
Proper installation requires correct surface preparation, cylinder head inspection, and the manufacturer's specified tightening procedure.
Do not install a new cylinder head gasket over warped, cracked, or improperly prepared sealing surfaces. Improper installation can result in compression loss, cooling water leakage, overheating, and engine damage.
Key Features and Benefits
- Genuine Mercury OEM: Original equipment manufacturer replacement cylinder head gasket.
- Verado L6 Compatibility: Listed for select Mercury 2.6L Inline 6 outboard engines.
- 225-300 HP Applications: Covers the specified 225, 250, 275, and 300 HP engine configurations.
- Mercury Part Number 8M0033476: Listed replacement for earlier Mercury 8M0024564 applications.
- Factory Replacement Component: Intended for compatible cylinder head service and repairs.
- Combustion Chamber Sealing: Provides the gasket interface between the cylinder head and engine block.
- Aftermarket Alternative Available: Pro Marine 24564P is offered separately.
- Dealer Pricing Available: Qualified marine businesses can apply for wholesale pricing.
Frequently Asked Questions
Is Mercury 8M0033476 a Genuine OEM cylinder head gasket?
Yes. Mercury 8M0033476 is a Genuine Mercury Marine OEM cylinder head gasket for compatible Verado L6 outboards.
Does Mercury 8M0033476 replace 8M0024564?
Yes. Mercury 8M0033476 is the listed replacement for earlier OEM number 8M0024564.
What Mercury Verado engines use this gasket?
This gasket is listed for select Mercury Verado 225, 250, 275, and 300 HP 2.6L Inline 6 4-stroke outboards within the specified serial ranges.
Does this gasket fit Mercury Verado 225 HP engines?
Yes, on compatible 225 HP L6 models within the listed serial number applications.
Does this gasket fit Mercury Verado 250 HP engines?
Yes, on compatible 250 HP L6 models within the listed serial number applications.
Does this gasket fit Mercury Verado 275 HP engines?
Yes, on compatible 275 HP L6 models within the listed serial number applications.
Does this gasket fit Mercury Verado 300 HP engines?
Yes, on compatible 300 HP L6 models within the listed serial number applications.
Will this gasket fit a Mercury Verado V8 or V10?
No. This listing is for compatible 2.6L Inline 6 Verado applications, not Mercury Verado V8 or V10 engines.
Is there an aftermarket replacement for Mercury 8M0033476?
Yes. Pro Marine USA offers Pro Marine 24564P as an aftermarket alternative for the listed applications.
How do I confirm the correct head gasket for my Verado?
Locate your Mercury engine serial number and compare it with the applicable Mercury parts diagram. Confirm that the diagram identifies 8M0033476 or a listed replacement number.
Dealer Discounts & Store Policies
Wholesale Marine Parts Pricing
Pro Marine USA supplies Genuine Mercury OEM and aftermarket marine engine parts, cylinder head gaskets, internal engine components, rebuild parts, and maintenance products to marine repair shops, dealerships, technicians, and retail customers.
Qualified marine businesses can apply for a Pro Marine dealer account to access wholesale pricing on eligible marine engine parts.
Shipping Information
- Free shipping on orders over $100 within the continental United States.
- In-stock orders received before 5:30 PM EST ship the same business day, Monday-Friday.
- Shipping options available through UPS, USPS, and FedEx.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Eligible returns are accepted within 30 days.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before returning merchandise.
Need Help Confirming Mercury Verado Fitment?
If you are unsure whether Genuine Mercury 8M0033476 is the correct cylinder head gasket for your Mercury Verado outboard, contact Pro Marine USA with your engine horsepower and complete serial number.
Contact Pro Marine USA or call 941-721-3000.
Searchable Part Numbers
24564, 24564P, 8M0033476, 8M0024564, 880552007, 895374, 895374002, 895374006, 27-8M0033476, 27-8M0024564, 27-895374006
Searchable Terms
Genuine Mercury 8M0033476, Mercury 8M0024564, Mercury 880552007, Mercury 895374, Mercury 895374002, Mercury 895374006, Mercury Verado OEM head gasket, Genuine Mercury Verado head gasket, Mercury Verado cylinder head gasket, Mercury Verado L6 head gasket, Mercury Verado Inline 6 head gasket, Mercury Verado 2.6L head gasket, Mercury Verado 225HP head gasket, Mercury Verado 250HP head gasket, Mercury Verado 275HP head gasket, Mercury Verado 300HP head gasket, Mercury Verado 225-300 HP head gasket, Mercury 225 Verado cylinder head gasket, Mercury 250 Verado cylinder head gasket, Mercury 275 Verado cylinder head gasket, Mercury 300 Verado cylinder head gasket, Mercury 6 cylinder head gasket, Mercury 4 stroke head gasket, Mercury L6 cylinder head gasket, Mercury outboard cylinder head gasket, Verado powerhead head gasket, Verado powerhead repair, Mercury Verado engine rebuild, Mercury Verado cylinder head repair, Mercury Verado compression loss, Mercury Verado cooling water intrusion, Mercury OEM engine parts, factory Mercury head gasket, original Mercury head gasket, Pro Marine 24564, Pro Marine 24564P aftermarket alternative
8M0033476
880552007
895374
895374002
895374006
Pro Marine Aftermarket Mercury Verado L6 Engine Components
Mercury Verado L6 225-300 HP Cylinder Head Gasket - Pro Marine 24564P
The Pro Marine 24564P Cylinder Head Gasket is an aftermarket replacement for select Mercury Verado 225, 250, 275, and 300 HP Inline 6 (L6) 4-stroke outboard engines. This gasket seals the cylinder head to the engine block, helping maintain combustion compression while separating the engine's cooling water and lubrication passages.
Pro Marine 24564P replaces Mercury OEM cylinder head gasket numbers 8M0033476, 8M0024564, 880552007, 895374, 895374002, and 895374006. Mercury part number 8M0033476 is the current replacement for the earlier 8M0024564 gasket.
Designed for compatible Mercury Verado L6 applications, this replacement gasket is used during cylinder head repairs, head gasket replacement, and engine rebuilding. It provides an aftermarket alternative to the Genuine Mercury OEM gasket.
Genuine Mercury OEM Version Available: Prefer the original factory part? Pro Marine USA also stocks Genuine Mercury 24564 / OEM 8M0033476 .
Product Information
- Pro Marine Part Number: 24564P
- Brand: Pro Marine Aftermarket
- Product Type: Cylinder Head Gasket
- Primary Mercury OEM Reference: 8M0033476
- Previous Mercury OEM Reference: 8M0024564
- Additional Cross References: 880552007, 895374, 895374002, 895374006
- Engine Manufacturer: Mercury Marine
- Engine Family: Mercury Verado
- Engine Configuration: Inline 6 Cylinder (L6)
- Engine Type: 4-Stroke Outboard
- Engine Displacement: 2.6 Liter
- Horsepower Applications: 225 HP, 250 HP, 275 HP, 300 HP
- Application: Cylinder Head to Engine Block
- Condition: New
- Genuine Mercury OEM Alternative: Pro Marine Item 24564 - Mercury OEM 8M0033476
OEM and Cross Reference Numbers
Pro Marine 24564P is an aftermarket replacement for the following Mercury Verado L6 cylinder head gasket part numbers.
| Manufacturer | Part Number | Description |
|---|---|---|
| Pro Marine | 24564P | Aftermarket Cylinder Head Gasket |
| Mercury Marine | 8M0033476 | Current OEM Replacement |
| Mercury Marine | 8M0024564 | Previous OEM Number |
| Mercury Marine | 880552007 | Earlier OEM Cross Reference |
| Mercury Marine | 895374 | Earlier OEM Cross Reference |
| Mercury Marine | 895374002 | Earlier OEM Cross Reference |
| Mercury Marine | 895374006 | Earlier OEM Cross Reference |
Mercury OEM 8M0024564 has been superseded by 8M0033476. The replacement gasket may differ in appearance from earlier production versions. Confirm compatibility using the engine's serial number and OEM parts diagram.
What This Part Is Used For
The cylinder head gasket is installed between the cylinder head and engine block on compatible Mercury Verado Inline 6 outboard engines.
Its primary function is to create a sealing interface around the combustion chambers while keeping cooling water and engine oil passages separated.
A properly installed head gasket helps maintain cylinder compression and prevents unwanted fluid movement between the engine's internal passages.
Common Repair Applications
- Mercury Verado L6 cylinder head gasket replacement
- 225 HP Verado Inline 6 engine repairs
- 250 HP Verado Inline 6 engine repairs
- 275 HP Verado Inline 6 engine repairs
- 300 HP Verado Inline 6 engine repairs
- Cylinder head removal and reinstallation
- Repairs involving cooling water or compression leakage
- Compatible Mercury Verado powerhead rebuilding
Important Fitment Note
Pro Marine 24564P is intended for select Mercury Verado 225, 250, 275, and 300 HP Inline 6 (L6) 4-stroke outboards.
Mercury produced multiple Verado engine configurations, and gasket compatibility varies by engine family and serial number. Not all Verado engines use the same cylinder head gasket.
This gasket is for the compatible 2.6L Inline 6 Verado applications. It should not be assumed to fit Mercury Verado 4-cylinder engines, V6 engines, V8 engines, V10 engines, or other Verado configurations.
Always confirm your complete engine serial number and the required Mercury OEM gasket number before ordering.
Compatible Mercury Verado Applications
Pro Marine 24564P fits select Mercury Verado 225-300 HP Inline 6 4-stroke outboard engines within the listed serial number ranges.
| Engine Family | Horsepower | Configuration |
|---|---|---|
| Mercury Verado L6 | 225 HP | 2.6L Inline 6, 4-Stroke |
| Mercury Verado L6 | 250 HP | 2.6L Inline 6, 4-Stroke |
| Mercury Verado L6 | 275 HP | 2.6L Inline 6, 4-Stroke |
| Mercury Verado L6 | 300 HP | 2.6L Inline 6, 4-Stroke |
Compatible Mercury Verado Serial Number Ranges
The following serial number ranges are included in the supplied fitment information for this gasket.
| Serial Number From | Serial Number Through | Application |
|---|---|---|
| 1B517434 | 2B144122 | Verado L6 |
| 2B034840 | 2B144122 | Verado L6 |
| 1B830170 | 2B144122 | Verado L6 |
| 2B144123 | 2B577715 | Verado L6 |
| 2B144123 | 2B578935 | Verado L6 |
| 0T980000 | 1B226999 | Verado L6 |
| 1B227000 | 1B381711 | Verado L6 |
| 0P409357 | 0P464487 | Verado L6 |
| 0P520553 | 2B144122 | Verado L6 |
Understanding Mercury Verado Serial Number Fitment
Mercury Verado L6 outboards were produced in multiple horsepower configurations and production series. Some serial number ranges overlap because they represent different engine variants.
The ranges above are supplied catalog applications and should be checked against the exact engine horsepower and serial number. A matching serial range alone does not establish compatibility with every Verado model.
Genuine Mercury OEM Cylinder Head Gasket Also Available
Pro Marine USA stocks both aftermarket and Genuine Mercury OEM versions of this cylinder head gasket. Choose the option that best fits your repair requirements.
Genuine Mercury 8M0033476 Cylinder Head Gasket
Genuine Mercury Marine factory replacement cylinder head gasket for compatible Mercury Verado Inline 6 outboard engines.
Pro Marine Item: 24564
Mercury OEM: 8M0033476
Previous OEM: 8M0024564
Manufacturer: Mercury Marine
The Genuine Mercury OEM gasket and Pro Marine aftermarket gasket are separate product listings. Confirm your engine serial number before selecting either version.
Common Symptoms of a Failed Cylinder Head Gasket
A damaged cylinder head gasket may allow combustion gases, cooling water, or engine oil to leak between internal engine passages.
Possible symptoms include:
- Loss of compression in one or more cylinders
- Engine overheating
- Cooling water entering a combustion chamber
- Water contamination in engine oil
- Rough idle or engine misfires
- Reduced engine performance
- Difficulty starting
- Combustion gases entering the cooling system
- Visible head gasket damage during engine disassembly
These symptoms may also be caused by other engine problems. Perform appropriate compression, cooling system, and engine diagnostic testing before replacing the gasket.
Installation and Service Tips
Replacing a Mercury Verado L6 cylinder head gasket requires cylinder head removal and careful inspection of the engine's sealing surfaces. Follow the Mercury service manual for the exact engine serial range.
Recommended Installation Practices
- Verify the complete Mercury engine serial number.
- Confirm that the engine is a compatible 2.6L Inline 6 Verado.
- Confirm the required Mercury OEM gasket number.
- Allow the engine to cool before beginning disassembly.
- Follow the correct cylinder head removal procedure.
- Inspect the cylinder head and engine block sealing surfaces.
- Check for warpage, cracks, corrosion, and other damage.
- Remove old gasket material without damaging sealing surfaces.
- Keep debris out of cylinders, cooling passages, and oil passages.
- Install the new gasket in the correct orientation.
- Use the manufacturer's specified fastener tightening sequence.
- Follow the correct torque and tightening procedure.
- Replace cylinder head fasteners or additional seals when required by the service manual.
- Inspect the cooling system for conditions that may have caused the original gasket failure.
- Check engine operation and cooling performance after reassembly.
Important Cylinder Head Installation Warning
Mercury Verado cylinder head gasket replacement requires correct surface preparation and the proper cylinder head tightening procedure.
Do not install a new cylinder head gasket over warped, cracked, or improperly prepared sealing surfaces. Incorrect installation can result in compression loss, cooling water leakage, overheating, and engine damage.
Key Features and Benefits
- Mercury Verado L6 Application: Replacement head gasket for select 2.6L Inline 6 Verado outboards.
- 225-300 HP Fitment: Listed for compatible 225, 250, 275, and 300 HP models.
- Pro Marine Aftermarket Replacement: Alternative to Genuine Mercury OEM cylinder head gasket 8M0033476.
- Multiple OEM Cross References: Replaces the listed earlier Mercury head gasket part numbers.
- Combustion Chamber Sealing: Provides the gasket interface between the cylinder head and engine block.
- Engine Repair Component: Used during compatible Verado cylinder head repairs and rebuilding.
- OEM Alternative Available: Genuine Mercury 8M0033476 is also stocked by Pro Marine USA.
- Dealer Pricing Available: Qualified marine businesses can apply for wholesale pricing.
Frequently Asked Questions
What Mercury OEM number does Pro Marine 24564P replace?
Pro Marine 24564P replaces Mercury OEM 8M0033476 and earlier numbers 8M0024564, 880552007, 895374, 895374002, and 895374006.
Does this gasket fit Mercury Verado 225 HP engines?
Yes. It is listed for select Mercury Verado 225 HP Inline 6 4-stroke outboards within the specified serial number ranges.
Does this gasket fit Mercury Verado 250 HP engines?
Yes. It is listed for select Mercury Verado 250 HP Inline 6 4-stroke outboards within the specified serial number ranges.
Does this gasket fit Mercury Verado 275 HP engines?
Yes. It is listed for select Mercury Verado 275 HP Inline 6 4-stroke outboards within the specified serial number ranges.
Does this gasket fit Mercury Verado 300 HP engines?
Yes. It is listed for select Mercury Verado 300 HP Inline 6 4-stroke outboards within the specified serial number ranges.
Does this gasket fit all Mercury Verado outboards?
No. Mercury Verado engines were produced in multiple configurations. This gasket is intended for compatible 2.6L Inline 6 models, not every Verado engine.
Is Mercury 8M0024564 the same as 8M0033476?
Mercury OEM 8M0024564 has been superseded by 8M0033476. The newer part is the listed functional replacement for compatible applications.
Do you stock the Genuine Mercury OEM version?
Yes. Pro Marine USA also stocks Genuine Mercury 8M0033476 Cylinder Head Gasket under Pro Marine item number 24564.
Is Pro Marine 24564P a Genuine Mercury gasket?
No. Pro Marine 24564P is an aftermarket replacement. The Genuine Mercury OEM version is available separately.
What are common symptoms of a blown Verado head gasket?
Possible symptoms include loss of compression, overheating, rough running, cooling water intrusion, and engine oil contamination. Proper diagnostic testing is required to confirm the cause.
Should I replace the head gasket after removing the cylinder head?
A removed cylinder head gasket should be replaced with the correct new gasket during reassembly. Follow the Mercury service manual for all required installation procedures.
Dealer Discounts & Store Policies
Wholesale Marine Parts Pricing
Pro Marine USA supplies Genuine Mercury OEM and aftermarket marine engine parts, cylinder head gaskets, internal engine components, rebuild parts, and maintenance products to marine repair shops, dealerships, technicians, and retail customers.
Qualified marine businesses can apply for a Pro Marine dealer account to access wholesale pricing on eligible marine engine parts.
Shipping Information
- Free shipping on orders over $100 within the continental United States.
- In-stock orders received before 5:30 PM EST ship the same business day, Monday-Friday.
- Shipping options available through UPS, USPS, and FedEx.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Eligible returns are accepted within 30 days.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before returning merchandise.
Need Help Confirming Mercury Verado Fitment?
If you are unsure whether Pro Marine 24564P is the correct cylinder head gasket for your Mercury Verado outboard, contact Pro Marine USA with your engine horsepower and complete serial number.
Contact Pro Marine USA or call 941-721-3000.
Searchable Part Numbers
24564P, 24564, 8M0033476, 8M0024564, 880552007, 895374, 895374002, 895374006, 27-8M0033476, 27-8M0024564, 27-895374006
Searchable Terms
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8M0024564
8M0033476
880552007
880552007
895374
895374
895374002
895374006
81551
818573
9-63850
