S2K Commerce - Products Dropdown
Actions
S2K Commerce - Order Entry
Actions
Genuine Mercury Adapter Plate Gasket 150500 HP V6, V8 and V10
| Quantity | Price |
| 1 | 32.13 |
Genuine Mercury OEM Adapter Plate Gasket
Mercury 8M0205773 Adapter Plate Gasket – Select 150–500 HP Outboards
The Genuine Mercury 8M0205773 Adapter Plate Gasket is an original equipment replacement gasket used in the adapter plate assembly of select Mercury outboard engines. It is associated with Mercury OEM reference numbers 8M0205773 and 8M0142274.
The supplied Mercury application records cover selected 3.4L V6, 4.6L V8, and 5.7L V10 outboard platforms, including Verado, Pro XS, SeaPro, AMS, and Mercury Racing configurations.
Applications include specified 150, 175, 200, 225, 250, 300, 350, 360, 400, 425, 450, and 500 HP models, depending on engine displacement, product family, and serial number.
This is a Genuine Mercury OEM replacement part for use when servicing the applicable adapter plate or related powerhead-to-midsection assembly.
Product Information
- Part Number: 8M0205773
- Brand: Genuine Mercury OEM
- Product Type: Adapter Plate Gasket
- OEM Cross Reference: 8M0142274
- Application: Adapter Plate / Powerhead-to-Midsection Assembly
- Engine Type: Mercury Four-Stroke Outboards
- Engine Platforms: 3.4L V6, 4.6L V8, 5.7L V10
- Horsepower Coverage: Select 150–500 HP
- Engine Families: Verado, Pro XS, SeaPro, AMS, Racing
- Condition: New OEM Replacement Part
OEM and Cross Reference Numbers
The following Mercury part numbers are associated with this adapter plate gasket application.
| Part Number | Brand | Description |
|---|---|---|
| 8M0205773 | Mercury | Current Listed OEM Adapter Plate Gasket |
| 8M0142274 | Mercury | OEM Cross Reference |
Cross-reference numbers are provided to assist with identifying the correct replacement. Confirm the applicable Mercury parts diagram before ordering.
What This Part Is Used For
The adapter plate is an important component of the outboard assembly connecting the powerhead to the engine's midsection. The adapter plate gasket provides a sealing interface between the mating components specified in the applicable Mercury parts diagram.
A properly installed gasket helps maintain the intended separation of passages and mating surfaces within the adapter plate assembly.
Common Service Applications
- Adapter plate removal and reinstallation
- Powerhead removal or installation
- Repair of leaks associated with the adapter plate sealing interface
- Inspection or repair of adapter plate mating surfaces
- Engine service requiring replacement of disturbed gaskets
- Specified Mercury Racing and Verado powerhead service
Important Fitment Note
Mercury 8M0205773 is not a universal gasket for all 150–500 HP Mercury outboards.
Mercury uses different adapter plate and gasket configurations depending on engine displacement, model family, midsection design, and serial range.
The fitment tables below are based on supplied Mercury parts-catalog application records. Some records identify the gasket within an Adapter Plate assembly, while others reference related Cylinder Block, Oil System, or Adapter Plate and Driveshaft Housing catalog sections.
Verify the complete engine serial number and the correct OEM parts diagram before ordering.
Compatible Mercury Outboard Applications
The following application tables organize the supplied Mercury catalog listings by engine displacement and model family. The serial numbers shown are the starting serial numbers listed in the supplied records.
Mercury 3.4L V6 – 150–225 HP
Selected Mercury 3.4L V6 applications include standard, Pro XS, SeaPro, and Racing configurations.
| Engine Application | Displacement | Serial Range |
|---|---|---|
| 150 HP V6 | 3.4L | 3B547096 and Later; 3B648748 and Later |
| 175 HP V6 | 3.4L | 2B529482 and Later |
| 175 HP V6 Pro XS | 3.4L | 2B529482 and Later |
| 200 HP V6 | 3.4L | 2B529482 and Later |
| 200 HP V6 SeaPro | 3.4L | 2B529482 and Later |
| 200 HP V6 Racing | 3.4L | 3B547096 and Later; 3B648748 and Later |
| 200 HP V6 Racing – 15-Inch Midsection | 3.4L | 1E054618 and Later |
| 200 ROS HP V6 – 15-Inch Midsection Racing | 3.4L | 1E054618 and Later |
| 225 HP V6 | 3.4L | 2B529482 and Later |
Mercury 4.6L V8 – 200–360 HP
The supplied Mercury records include numerous 4.6L V8 applications, including Verado, Pro XS, SeaPro, CMS, AMS, APX, and Racing models.
| Engine Application | Displacement | Serial Range |
|---|---|---|
| 200 HP V8 Pro XS | 4.6L | 2B529482 and Later |
| 225 HP V8 Pro XS | 4.6L | 2B529482 and Later |
| 225 HP V8 SeaPro | 4.6L | 2B529482 and Later |
| 250 HP V8 Pro XS | 4.6L | 2B529482 and Later |
| 250 HP V8 SeaPro | 4.6L | 2B529482 and Later |
| 250 HP V8 Verado | 4.6L | 2B529482 and Later |
| 250 HP V8 APX | 4.6L | 1E054548 and Later |
| 250R HP V8 Racing | 4.6L | 1E080500 and Later |
| 300 HP V8 Pro XS | 4.6L | 2B529482 and Later |
| 300 HP V8 SeaPro | 4.6L | 2B529482 and Later |
| 300 HP V8 Verado | 4.6L | 2B529482 and Later |
| 300 HP V8 CMS | 4.6L | 2B529482 and Later |
| 300 HP V8 AMS SeaPro | 4.6L | 2B529482 and Later |
| 300R HP V8 Racing | 4.6L | 1E080500 and Later |
| 300R HP V8 AMS Racing | 4.6L | 1E081459 and Later |
| 300 ROS HP V8 – 15-Inch Midsection Racing | 4.6L | 1E054618 and Later |
| 300 HP V8 APX | 4.6L | 1E054548 and Later |
| 350 HP V8 AMS SeaPro | 4.6L | 2B529482 and Later |
| 360 HP V8 APX | 4.6L | 1E054247 and Later |
Mercury Racing 4.6L V8 – 450R and 500R
| Engine Application | Displacement | Serial Range |
|---|---|---|
| 450R HP V8 Racing | 4.6L | 1E083006 through 1E099720 |
| 500R HP V8 Racing | 4.6L | 1E099432 and Later |
Mercury 5.7L V10 – 350–425 HP
The supplied fitment records also include selected Mercury 5.7L V10 Verado, SeaPro, and Racing engines.
| Engine Application | Serial Range |
|---|---|
| 350 HP V10 Verado | 3B266064 through 3B576448; 3B576449 and Later |
| 350 HP V10 Verado SeaPro | 3B266064 and Later |
| 400 HP V10 Verado | 3B266064 and Later |
| 400R HP V10 Racing | 3B272954 and Later |
| 425 HP V10 Verado | 3B576447 and Later |
The applications above were compiled from Mercury parts-catalog listings for adapter plates, adapter plate and driveshaft housing assemblies, cylinder blocks, oil systems, and related powerhead gasket sections. Individual engine serial ranges and assembly configurations must be confirmed using the applicable Mercury OEM parts diagram.
Common Symptoms and Replacement Reasons
Adapter plate gasket replacement may be required when the powerhead or adapter plate assembly is removed, or when an inspection identifies a sealing problem at the mating surfaces.
- Visible leakage near the adapter plate assembly
- Damaged or deteriorated gasket material
- Gasket replacement during powerhead removal
- Adapter plate disassembly for engine repairs
- Evidence of leakage at the gasket sealing interface
- Replacement of a gasket disturbed during service
Similar symptoms can have several causes. Inspect the applicable engine assembly and confirm the source of the problem before replacing parts.
Installation and Service Tips
- Confirm the correct gasket using the engine serial number.
- Follow the Mercury service manual for the exact engine model.
- Remove the old gasket material without damaging mating surfaces.
- Inspect the adapter plate and adjoining components for damage or distortion.
- Clean mating surfaces as specified in the service manual.
- Check gasket orientation before assembling the components.
- Use the correct Mercury fastener sequence and torque specifications.
- Apply sealants only where specifically required by Mercury.
- Inspect the assembly for leakage after service.
Improper gasket installation or incorrect adapter plate assembly can cause leakage or engine damage. Always follow the appropriate Mercury service procedures and specifications.
Key Features and Benefits
- Genuine Mercury OEM: Factory replacement gasket for specified Mercury outboards.
- OEM Part Number: 8M0205773.
- Cross Reference: 8M0142274.
- Multiple Engine Platforms: Listed for selected 3.4L V6, 4.6L V8, and 5.7L V10 applications.
- 150–500 HP Coverage: Supports a range of model-specific Mercury outboard applications.
- Performance Models: Includes specified Mercury Racing, Verado, Pro XS, and SeaPro configurations.
- Service Replacement: Intended for use when servicing compatible adapter plate assemblies.
- Dealer Pricing: Wholesale purchasing options available to qualified Pro Marine USA dealers.
Frequently Asked Questions
What is Mercury 8M0205773?
Mercury 8M0205773 is a genuine OEM adapter plate gasket used on select Mercury V6, V8, and V10 outboard engines.
Does 8M0205773 cross reference Mercury 8M0142274?
Yes. Mercury 8M0142274 is a supplied OEM cross-reference for 8M0205773. Confirm the correct application by engine serial number.
Does this gasket fit Mercury V8 Verado engines?
The supplied applications include select Mercury 250 and 300 HP 4.6L V8 Verado models beginning at serial number 2B529482.
Will this gasket fit Mercury V10 Verado engines?
The supplied Mercury records include specified 350, 400, and 425 HP 5.7L V10 Verado applications. Verify the exact serial range before ordering.
Does Mercury 8M0205773 fit Pro XS engines?
The supplied fitment includes select 175 HP 3.4L V6 Pro XS and 200, 225, 250, and 300 HP 4.6L V8 Pro XS applications.
Does this gasket fit Mercury SeaPro outboards?
Yes, the supplied application records include specified V6, V8, and V10 SeaPro configurations. Fitment varies by engine family and serial number.
Is this gasket used on Mercury Racing engines?
The supplied records include selected 200R, 250R, 300R, 400R, 450R, and 500R Racing applications, along with specified APX and 15-inch midsection configurations.
Is this a genuine Mercury part?
Yes. Part number 8M0205773 is listed as a Genuine Mercury OEM adapter plate gasket.
Should the gasket be replaced when removing the powerhead?
Gaskets disturbed during disassembly should be evaluated and replaced according to Mercury's service procedures. Follow the service manual for the specific engine.
How do I verify that 8M0205773 fits my engine?
Locate the complete engine serial number and consult the corresponding Mercury OEM parts diagram. Confirm that the adapter plate assembly specifies 8M0205773 or its applicable cross-reference.
Dealer Discounts & Store Policies
Wholesale Marine Parts Pricing
Pro Marine USA supplies genuine OEM and aftermarket marine engine parts to professional marine technicians, repair shops, dealerships, and retail customers.
Qualified marine businesses can apply for a Pro Marine dealer account to access wholesale pricing on eligible marine 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 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 gasket fitment? Contact Pro Marine USA or call 941-721-3000.
Searchable Part Numbers
8M0205773, 8M0142274
Searchable Terms
Mercury 8M0205773 adapter plate gasket, Mercury 8M0142274 gasket, Genuine Mercury adapter plate gasket, Mercury OEM adapter gasket, Mercury V6 adapter plate gasket, Mercury 3.4L V6 gasket, Mercury V8 adapter plate gasket, Mercury 4.6L V8 gasket, Mercury V10 adapter plate gasket, Mercury 5.7L V10 gasket, Mercury Verado adapter plate gasket, Mercury Pro XS adapter plate gasket, Mercury SeaPro adapter plate gasket, Mercury Racing adapter plate gasket, Mercury 150 HP gasket, Mercury 175 HP gasket, Mercury 200 HP gasket, Mercury 225 HP gasket, Mercury 250 HP gasket, Mercury 300 HP gasket, Mercury 350 HP gasket, Mercury 360 HP gasket, Mercury 400 HP gasket, Mercury 425 HP gasket, Mercury 450R gasket, Mercury 500R gasket, Mercury adapter plate seal, Mercury powerhead adapter gasket, Mercury outboard midsection gasket