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Mercury Outboard Parts
Shop Mercury outboard motor parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, and routine service items. Browse OEM and replacement Mercury marine parts to support maintenance, repair, and rebuild projects.
Shop by System
- Complete Powerheads
- Control Cables & Boxes
- Cooling System
- Cowlings & Components
- Electrical System
- Engine Oil
- Engine Rebuild Kits
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service & Oil Change Kits
- Service Manuals
- Steering Systems
- Throttle Components
- Transom & Midsection
- Trim System
- Wizard Performance Parts
Common Mercury Outboard Model References
This category supports many popular Mercury outboards across a wide horsepower range. Always confirm your model and serial number for best fitment.
- Portable & Midrange: 2.5HP–60HP (2-stroke & FourStroke)
- Performance: Pro XS and EFI platforms (75HP–300HP)
- Direct Injection: Optimax models (75HP–250HP)
- Premium Offshore: Verado models (135HP–400HP)
- Commercial: SeaPro models (commonly 75HP–300HP)
Always confirm your exact horsepower, model year, and serial number to ensure proper part compatibility before ordering.
Sierra Marine Cooling System Component
Yamaha V4 V6 115-300HP & Mercury 225/250 Driveshaft Collar
The Sierra 18-9076 Driveshaft Collar is a direct replacement for Yamaha OEM 61A-45527-00-00 and Mercury OEM 8886901. This collar is used in the water pump assembly on numerous Yamaha V4 and V6 outboards as well as Mercury 225 and 250 EFI FourStroke applications.
During water pump service, lower unit repairs, or cooling system rebuilds, replacing worn collars can help maintain proper component alignment and reliable cooling system operation.
Compatible Applications
Yamaha OEM number 61A-45527-00-00 is used across a large range of Yamaha V4 and V6 outboards including Saltwater Series, EFI, OX66, HPDI, VMAX, and select four-stroke models. Mercury OEM 8886901 cross references to Mercury 225 and 250 EFI FourStroke applications.
| Manufacturer | Common Applications |
|---|---|
| Yamaha | 115HP, C115, S115 |
| Yamaha | 130HP, L130 |
| Yamaha | 150HP, C150, D150, DX150, FL150, LF150, LX150, SX150, VX150, VZ150, Z150 |
| Yamaha | 175HP Models |
| Yamaha | 200HP, F200, LF200, LX200, SX200, VX200, VZ200, Z200 |
| Yamaha | 225HP, F225, LF225, LX225, VX225, V225, OX66 225, VMAX 225 |
| Yamaha | 250HP, L250, LX250, SX250, VX250, VZ250, Z250, OX66 250 |
| Yamaha | 300HP, LZ300, VZ300, Z300 |
| Mercury | 225 EFI FourStroke |
| Mercury | 250 EFI FourStroke |
Yamaha used this collar across numerous V4 and V6 platforms over multiple years and engine families. Always verify your engine serial number and OEM part number before ordering.
This Sierra collar replaces Yamaha OEM 61A-45527-00-00 and Mercury OEM 8886901.
OEM & Cross Reference Numbers
| Type | Part Number |
|---|---|
| Sierra | 18-9076 |
| Yamaha OEM | 61A-45527-00-00 |
| Mercury OEM | 8886901 |
Available in Multiple Brands
OEM Yamaha 45527
Genuine Yamaha factory replacement for customers who prefer OEM parts.
View OEM Version
Pro Marine 45527P
Popular aftermarket replacement trusted by marine technicians and repair shops.
View Pro Marine Version
GLM 9076GM
Alternative aftermarket option from GLM Marine for the same Yamaha and Mercury applications.
View GLM VersionWhat This Part Is Used For
The driveshaft collar is part of the lower unit cooling system assembly and works with the water pump housing, wear plate, impeller, and related components. Proper spacing and alignment are critical to water pump performance and cooling system efficiency.
Many technicians replace collars whenever major water pump service is performed, particularly on high-hour engines or saltwater-operated boats.
Why Replace a Driveshaft Collar?
- Corrosion may affect proper component fitment
- Wear can impact water pump assembly alignment
- Often serviced during water pump rebuilds
- Helps maintain proper cooling system operation
- Ideal preventative maintenance item during lower unit service
Sierra 18-9076 Features
- Direct replacement for Yamaha 61A-45527-00-00
- Direct replacement for Mercury 8886901
- Fits many Yamaha V4 and V6 applications from 115HP-300HP
- Compatible with Mercury 225 and 250 EFI FourStroke models
- Quality Sierra Marine aftermarket construction
- OEM, Pro Marine, and GLM alternatives available above
FAQ
What OEM numbers does Sierra 18-9076 replace?
Yamaha 61A-45527-00-00 and Mercury 8886901.
What Yamaha engines commonly use this collar?
Many Yamaha 115HP, 130HP, 150HP, 175HP, 200HP, 225HP, 250HP, and 300HP V4 and V6 applications including OX66, VMAX, EFI, Saltwater Series, and select four-stroke models.
Does this fit Mercury outboards?
Yes. Mercury 225 and 250 EFI FourStroke models commonly use Mercury OEM 8886901.
Do you carry OEM and aftermarket alternatives?
Yes. OEM Yamaha, Pro Marine, and GLM versions are linked above.
Should I replace this during water pump service?
If wear, corrosion, or damage is present, replacement is recommended while the lower unit is apart.
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 unused.
- Installed parts are not returnable.
- Return authorization required before return.
Searchable Terms
Sierra 18-9076, 18-9076, Yamaha 61A-45527-00-00, Mercury 8886901, Yamaha V4 driveshaft collar, Yamaha V6 driveshaft collar, Yamaha VMAX water pump parts, Yamaha OX66 cooling system parts, Yamaha 225 driveshaft collar, Yamaha 250 driveshaft collar, Mercury 225 EFI FourStroke parts, Mercury 250 EFI FourStroke parts, Pro Marine 45527P, GLM 9076GM, OEM Yamaha 45527
8886901
9-43712
18-5777-1
7452A11
7452A14
7452A21
7452A8
9-25103
888733T1
18-3407
817275A3
817275A4
817275K05
817275Q05
817275Q4
817275T4
9-48315
OEM Mercury Aluminum Anode Kit
Mercury V12 Verado & SeaPro Aluminum Anode Kit
The Mercury 8M0179981 aluminum anode kit is a complete replacement kit for the factory-installed anodes used on compatible Mercury V12 outboards.
Fresh anodes help protect the outboard from the harmful effects of galvanic corrosion in both freshwater and saltwater applications.
Compatible Applications
| Brand | Engine Family | Horsepower | Serial Range |
|---|---|---|---|
| Mercury | 7.6L V12 Verado | 600HP | 3B060051 & Newer |
| Mercury | 7.6L V12 SeaPro | 500HP | 3B060051 & Newer |
This Mercury aluminum anode kit is designed to replace all factory-installed anodes on compatible Mercury V12 Verado and SeaPro outboards.
Routine anode inspection and replacement helps support long-term corrosion protection in both freshwater and saltwater environments.
This anode kit fits compatible Mercury V12 600HP Verado and 500HP SeaPro outboards with serial numbers 3B060051 and newer.
Always verify engine model and serial number before ordering.
What is Included
| Included Component | Application |
|---|---|
| Aluminum Anodes | Factory-style corrosion protection replacement |
| Gearcase / Lower Unit Anodes | Lower unit corrosion protection |
| Bracket / Transom Anodes | Bracket and mounting corrosion protection |
| Installation Hardware | Routine anode replacement service |
Complete Your Service
Mercury V12 Verado 200 Hour Service Kit
OEM Mercury 200 hour service kit for compatible Mercury V12 Verado outboards.
View ProductWhat This Anode Kit is Used For
The Mercury 8M0179981 aluminum anode kit is used to replace worn or corroded sacrificial anodes on compatible Mercury V12 Verado and SeaPro outboards.
Sacrificial anodes help protect submerged metal components from galvanic corrosion caused by electrical activity in marine environments.
Routine inspection and replacement of anodes is an important part of preventative maintenance, especially for boats operated in saltwater or stored in the water for extended periods.
Aluminum anodes are suitable for both freshwater and saltwater applications and are commonly used on modern Mercury outboards.
Key Features and Benefits
- OEM Mercury aluminum anode kit
- Fits Mercury 7.6L V12 600HP Verado outboards
- Fits Mercury 7.6L V12 500HP SeaPro outboards
- For serial numbers 3B060051 and newer
- Complete replacement kit for factory-installed anodes
- Designed for freshwater and saltwater use
- Helps protect against galvanic corrosion
- Supports long-term outboard corrosion protection
- Includes installation hardware
- OEM Mercury fit, function, and performance
Anode Kit Details
- Part Number: 8M0179981
- Application: Mercury V12 Verado & SeaPro Outboards
- Engine Families: 7.6L V12 Verado / 7.6L V12 SeaPro
- Horsepower Compatibility: 500HP SeaPro / 600HP Verado
- Serial Range: 3B060051 & Newer
- Anode Material: Aluminum
- Water Type: Freshwater & Saltwater
- Installation Hardware: Included
FAQ
What engines does this anode kit fit?
This kit fits compatible Mercury 7.6L V12 600HP Verado and
500HP SeaPro outboards with serial numbers 3B060051 and newer.
What does this kit replace?
This is a complete replacement kit for the factory-installed anodes
used on compatible Mercury V12 outboards.
Can these anodes be used in saltwater?
Yes. These aluminum anodes are designed for use in both
freshwater and saltwater applications.
Why are sacrificial anodes important?
Sacrificial anodes help protect expensive submerged metal components
from galvanic corrosion in marine environments.
How often should anodes be inspected?
Mercury recommends routine inspection of anodes and replacement
when significant corrosion or material loss is visible.
Do you offer a service kit for the Mercury V12 Verado?
Yes. The Mercury V12 Verado 200 hour service kit 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.
- Items must be new, unused, and in original packaging.
- Installed or used corrosion protection components may not be returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0179981, Mercury V12 anode kit, Mercury V12 Verado anodes, Mercury 600HP Verado anodes, Mercury 500HP SeaPro anodes, Mercury aluminum anode kit, Mercury V12 corrosion protection, Mercury sacrificial anodes, Mercury Verado aluminum anodes, Mercury V12 maintenance, 8M0179987, Mercury V12 200 hour kit, Mercury V12 Verado service kit, Mercury SeaPro anode kit, Mercury V12 lower unit anodes
8M0103092
895815
8M0205803
8M020802
Mercury 450R V8 Replacement Belt
Mercury 8M0159595 Belt
The Mercury 8M0159595 Belt is a replacement belt for compatible Mercury 450R V8 belt drive systems. A worn or damaged belt can cause squealing, slipping, charging issues, overheating concerns, or poor accessory drive performance.
When replacing this belt, inspect the belt tensioner and pulley assembly at the same time. The related Mercury 8M0164060 tensioner assembly is linked below.
Compatible Applications
| Engine / Application | Part Number |
|---|---|
| Mercury 450R V8 belt drive system | 8M0159595 |
Verify your engine serial number and original belt part number before ordering. Mercury belt lengths and belt drive components can vary by model and serial range.
OEM & Cross Reference Numbers
| Type | Part Number |
|---|---|
| Mercury OEM | 8M0159595 |
Related Tensioner Assembly
Mercury 8M0164060 Tensioner Assembly
If the belt is worn, slipping, squealing, or tracking incorrectly, inspect the tensioner assembly as well. A weak or noisy tensioner can shorten belt life and cause repeat belt problems.
What This Part is Used For
The engine belt transfers power through the belt drive system to related engine accessories. Proper belt condition is important for quiet operation, correct pulley tracking, and dependable accessory drive performance.
A belt should be replaced if it shows cracks, glazing, fraying, uneven wear, contamination, slipping, or noise. Because the belt works directly with the tensioner and pulleys, those parts should be inspected during the same service.
Key Features and Benefits
- Mercury OEM replacement belt
- Part number 8M0159595
- Used on compatible Mercury 450R V8 belt drive systems
- Helps restore proper belt drive operation
- Recommended replacement when the belt is cracked, glazed, noisy, or slipping
- Related Mercury 8M0164060 tensioner assembly linked above
- Good service practice is to inspect the belt, tensioner, and pulleys together
Common Signs of Belt Wear
| Symptom | What to Check |
|---|---|
| Squealing or chirping | Worn belt, weak tensioner, pulley alignment, or contamination |
| Cracks or fraying | Replace the belt and inspect pulley surfaces |
| Glazed belt surface | Slipping belt, weak tensioner, or worn pulley contact |
| Uneven belt wear | Misalignment, tensioner wear, or pulley damage |
| Repeat belt failure | Inspect tensioner assembly and pulley system before installing another belt |
FAQ
What is the OEM number for this belt?
The OEM part number is 8M0159595.
What engine is this belt commonly used on?
This belt is listed for compatible Mercury 450R V8 belt drive systems.
Should I replace the tensioner when replacing the belt?
Not always, but the tensioner should be inspected during belt service. If the
tensioner is weak, noisy, binding, or the pulley is worn, replace it with the
related 8M0164060 tensioner assembly.
Can a bad tensioner damage a new belt?
Yes. A weak, worn, or misaligned tensioner can cause slipping, noise, uneven
wear, and premature belt failure.
When should this belt be replaced?
Replace the belt if it is cracked, frayed, glazed, contaminated, slipping,
noisy, or showing uneven wear.
Do I need to verify fitment?
Yes. Always verify your engine serial number and original belt part number
before ordering.
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 is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0159595, Mercury 8M0159595, Mercury belt, Mercury 450R belt, Mercury 450R V8 belt, Mercury Racing 450R belt, Mercury outboard belt, Mercury replacement belt, Mercury belt drive, outboard engine belt, belt squeal Mercury outboard, Mercury belt replacement, Mercury pulley belt, 8M0164060, Mercury 8M0164060, Mercury tensioner assembly, Mercury 450R tensioner, belt and tensioner replacement