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Inboard Marine Engine & Drive Parts For Mercruiser, Volvo, OMC, PCM
Shop inboard and sterndrive marine parts for maintenance, troubleshooting, repair, and full engine rebuild projects. This category includes OEM parts and quality OEM specification aftermarket products from Pro Marine for Mercruiser, Volvo, OMC, Crusader, Pleasurecraft, Indmar, and Chrysler marine engine applications.
Browse marine engine parts by brand and engine system, including cooling systems, ignition and electrical components, fuel delivery parts, exhaust components, internal engine parts, sterndrive and lower drive components, gaskets, seals, steering components, service kits, oil change kits, and rebuild parts.
Shop Inboard Categories
Mercruiser Engine Cooling, fuel, ignition, exhaust, and engine parts 
Mercruiser Drive Driveshaft housing, lower gearcase, transom, and trim parts 
Volvo Engine Volvo cooling, electrical, exhaust, and internal engine parts 
Volvo Drive Volvo drive housing, gearcase, transom, and trim components 
OMC Engine OMC fuel, cooling, electrical, exhaust, and engine parts 
OMC Drive OMC drive housing, lower gearcase, transom, and trim parts 
Crusader Engine Crusader cooling, fuel, ignition, exhaust, and engine parts 
Pleasurecraft Engine Pleasurecraft marine engine maintenance and repair parts 
Indmar Engine Indmar cooling, fuel, electrical, and engine components 
Chrysler Engine Chrysler marine engine maintenance and rebuild parts Common Inboard and Sterndrive Parts Found in This Category
- Water pumps, impellers, thermostats, manifolds, and cooling system parts
- Fuel pumps, carburetor kits, injectors, filters, and fuel delivery components
- Ignition coils, distributors, sensors, alternators, starters, and electrical parts
- Pistons, bearings, crankshafts, gaskets, seals, and engine rebuild components
- Bellows, gimbal bearings, shift cables, trim parts, and sterndrive components
- Exhaust manifolds, risers, couplers, and marine exhaust parts
- Oil change kits, filters, spark plugs, lubricants, and routine service items
Common Inboard and Sterndrive Problems and Where to Start
- Overheating: inspect impellers, water pumps, thermostats, manifolds, and cooling passages.
- Hard starting or rough idle: check ignition components, carburetor parts, fuel delivery systems, and sensors.
- Water intrusion into the drive: inspect bellows, seals, gimbal bearings, and sterndrive housing components.
- Loss of power or engine noise: inspect compression, bearings, gaskets, pistons, and internal engine components.
- Drive vibration or shifting issues: inspect couplers, shift cables, u-joints, gears, and lower drive components.
Frequently Asked Questions
What is the difference between OEM and aftermarket marine parts?
OEM parts are produced by the original engine manufacturer. Aftermarket parts are replacement parts produced by other manufacturers to fit the same application. Pro Marine provides quality OEM specification aftermarket products for marine maintenance, repair, and rebuild applications.
How do I find the correct inboard or sterndrive parts?
Use your engine model number, serial number, drive model, and horsepower information to confirm fitment. Sterndrive applications may also require the drive serial number for accurate parts matching.
What brands are included in this category?
This category includes Mercruiser, Volvo, OMC, Crusader, Pleasurecraft, Indmar, and Chrysler marine engine applications.
What are common signs my sterndrive needs service?
Common warning signs include overheating, water in gear lube, vibration, difficult shifting, drive noise, poor acceleration, bellows leaks, and excessive corrosion.
Are aftermarket sterndrive and inboard parts reliable?
Yes. Quality aftermarket marine parts are commonly used by marine mechanics and rebuilders. Pro Marine offers OEM specification aftermarket products for many marine engine and sterndrive repair applications.
Tip: Before ordering sterndrive or inboard parts, verify the engine model, serial number, and drive model information whenever possible.
92852
99370A2
Genuine Mercury MerCruiser OEM Engine Coupler
MerCruiser Bravo Engine Coupler 4.3 5.0 5.7 6.2 7.4 8.1 OEM
The Mercury MerCruiser 8M0098795 Engine Coupler is a genuine OEM replacement coupler used on many MerCruiser Bravo sterndrive applications using GM-based marine engines.
This OEM coupler replaces older Mercury / MerCruiser part numbers including 861523A9, 18311A17, 18309A2, 18311A2, and 812964A2.
Common Compatible Applications
| Engine Family | Drive Type | Common Applications |
|---|---|---|
| 4.3L MerCruiser V6 | Bravo One / Two / Three | Select carbureted and MPI applications |
| 5.0L MerCruiser V8 | Bravo One / Two / Three | Select Bravo-drive applications |
| 5.7L MerCruiser V8 | Bravo One / Two / Three | Common carbureted, EFI, MPI, and MAG applications |
| 6.2L MerCruiser | Bravo One / Two / Three | Select MPI and MAG applications |
| 7.4L MerCruiser Big Block | Bravo One / Two / Three | Select Bravo-drive big block applications |
| 8.1L MerCruiser | Bravo One / Two / Three | Select Horizon and MPI applications |
| 8.2L MerCruiser | Bravo Applications | Select late-model applications |
Engine coupler fitment depends on:
- Engine serial number
- Flywheel housing style
- Spline configuration
- Bravo drive generation
- Engine package
OEM Part Numbers & Cross References
| Brand / Type | Part Number |
|---|---|
| Mercury / MerCruiser OEM | 8M0098795 |
| Previous Mercury / MerCruiser OEM | 861523A9 |
| Previous Mercury / MerCruiser OEM | 18311A17 |
| Previous Mercury / MerCruiser OEM | 18309A2 |
| Previous Mercury / MerCruiser OEM | 18311A2 |
| Previous Mercury / MerCruiser OEM | 812964A2 |
| EMP Aftermarket Alternative | 96523 |
Looking for a Heavy-Duty Aftermarket Alternative?
EMP Heavy-Duty MerCruiser Bravo Engine Coupler
We also stock the EMP 96523 heavy-duty aftermarket engine coupler as a cost-effective replacement alternative for many Bravo applications.
View EMP CouplerWhat This Engine Coupler Does
The engine coupler transfers engine power from the flywheel assembly into the Bravo sterndrive input shaft.
A damaged coupler may cause:
- Loss of propulsion
- Drive engagement problems
- Spline stripping or wear
- Abnormal vibration
- Slipping under load
Proper engine alignment is critical during installation. Incorrect alignment is one of the leading causes of premature coupler failure.
Why Choose Genuine Mercury OEM?
- Factory-original Mercury / MerCruiser component
- Built to Mercury engineering specifications
- Correct fit and spline compatibility
- Designed for Bravo drivetrain systems
- Trusted OEM quality and durability
Key Features and Benefits
- Genuine Mercury / MerCruiser OEM engine coupler
- Replaces multiple previous Mercury part numbers
- Fits many Bravo sterndrive applications
- Compatible with GM-based marine V6 and V8 engines
- Supports Bravo One, Bravo Two, and Bravo Three drives
- Commonly used on MPI, MAG, EFI, and carbureted applications
- EMP heavy-duty alternative available
Part Details
- OEM Part Number: 8M0098795
- Previous OEM Numbers: 861523A9, 18311A17, 18309A2, 18311A2, 812964A2
- Product Type: Engine Coupler
- Application: MerCruiser Bravo Sterndrive Applications
- Drive Compatibility: Bravo One / Bravo Two / Bravo Three
- Manufacturer: Mercury Marine
FAQ
What OEM numbers does this replace?
This coupler replaces 861523A9, 18311A17,
18309A2, 18311A2, and 812964A2.
What MerCruiser engines commonly use this coupler?
Common applications include 4.3L, 5.0L, 5.7L, 6.2L, 7.4L,
8.1L, and select 8.2L Bravo applications.
Does this fit Bravo One, Two, and Three drives?
Yes, this coupler is commonly associated with Bravo One,
Bravo Two, and Bravo Three applications.
Should engine alignment be checked during installation?
Yes. Proper alignment is critical and helps prevent premature
coupler wear or spline damage.
Do you also stock an aftermarket alternative?
Yes. The EMP 96523 heavy-duty aftermarket coupler is linked above.
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 and uninstalled for return eligibility.
- Return authorization is required before returning products.
Need help with fitment or ordering?
Contact Us
Phone: 941-721-3000
Searchable Terms
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