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8M0205803
8M020802
Mercury Racing Lower Unit and Gearcase
Mercury Racing 8M0176859 5.44 Inch XL Gearcase
Mercury Racing 8M0176859 is a 5.44 inch XL gearcase assembly with a 1.60 gear ratio and standard rotation. It is used on Mercury Racing 450R supercharged 4.6L V8 Verado platform applications.
This current Mercury Racing gearcase supersedes 8M0159651. Because complete lower unit assemblies are highly specific to shaft length, gear ratio, rotation, engine family, and serial number, confirm your exact application before ordering.
Compatible Applications
| Brand | Engine / System | Application | Fitment Note |
|---|---|---|---|
| Mercury Racing | 450R Supercharged 4.6L V8 | 5.44 inch XL gearcase, 1.60 ratio, standard rotation | Verify by serial number, shaft length, ratio, and rotation |
| Mercury Racing | High-Horsepower 4.6L V8 Performance Models | Select applications requiring XL shaft and 1.60 standard rotation gearcase | Confirm the OEM parts diagram for your engine serial number |
Important Fitment Note
Always confirm compatibility using your engine serial number, model, existing gearcase number, shaft length, gear ratio, and rotation before ordering. XL, counter rotation, standard rotation, and ratio differences are not interchangeable.
OEM & Cross Reference Numbers
| Current Mercury Racing OEM Number | 8M0176859 |
| Superseded From | 8M0159651 |
| Description | 5.44 inch XL gearcase, 1.60 ratio, standard rotation |
What This Part Is Used For
This is a complete lower unit gearcase assembly used to transfer engine power through the driveshaft and gear set to the propeller shaft. The 1.60 gear ratio and standard rotation configuration are designed for specific Mercury Racing performance setups.
Replacement may be required after gearcase impact damage, internal gear failure, bearing damage, housing damage, or a complete lower unit service decision where assembly replacement is preferred over rebuilding.
Key Features and Benefits
- Genuine Mercury Racing gearcase assembly
- Current part number 8M0176859
- Supersedes Mercury Racing 8M0159651
- 5.44 inch gearcase for high-performance applications
- XL shaft configuration
- 1.60 gear ratio with standard rotation
- Designed for select Mercury Racing 450R and 4.6L V8 performance models
- Best verified by serial number, shaft length, ratio, and rotation
FAQ
What does Mercury Racing 8M0176859 replace?
Mercury Racing 8M0176859 supersedes 8M0159651 for this 5.44 inch XL, 1.60 ratio, standard rotation gearcase application.
Does this fit the Mercury Racing 450R?
This gearcase is used on Mercury Racing 450R supercharged 4.6L V8 applications that require the XL shaft, 1.60 gear ratio, and standard rotation gearcase.
Is this the same as a counter rotation gearcase?
No. This page is for the standard rotation version. Counter rotation gearcases use different part numbers and must be matched to the correct engine and boat setup.
What should I verify before ordering?
Verify your engine serial number, shaft length, rotation, gear ratio, and current gearcase part number. Complete gearcase assemblies are application specific and should not be selected by horsepower alone.
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
Mercury Racing 450R gearcase, Mercury 450R lower unit, Mercury Racing XL gearcase, 5.44 inch gearcase, 1.60 ratio Mercury gearcase, Mercury standard rotation gearcase, Mercury V8 Racing lower unit, 450R standard rotation lower unit
Searchable Part Numbers
8M0176859, 8M0159651, Mercury Racing 8M0176859, Mercury Racing 8M0159651
8M0176859
8M0236145
8M0250689
8M0228609
842739T03
842739T16
OEM Mercury 40-60HP 300 Hour Service Kit With Oil
Mercury 40-60HP 300 Hour Kit Standard Gearcase
The Mercury 8M0113483-L 300 Hour Service Kit is a complete maintenance package for Mercury 40HP, 50HP, and 60HP FourStroke EFI outboards with serial numbers 1C000001 and higher equipped with standard gearcases.
This 300 hour maintenance kit includes the required service components along with Mercury 10W30 engine oil and gear lube for scheduled maintenance service.
Compatible Applications
| Brand | Horsepower | Engine Type | Gearcase Type | Serial Range |
|---|---|---|---|---|
| Mercury | 40HP | FourStroke EFI Outboard | Standard Gearcase | 1C000001 & Higher |
| Mercury | 50HP | FourStroke EFI Outboard | Standard Gearcase | 1C000001 & Higher |
| Mercury | 60HP | FourStroke EFI Outboard | Standard Gearcase | 1C000001 & Higher |
This Mercury 300 hour service kit fits Mercury 40-60HP FourStroke EFI outboards with serial numbers 1C000001 and higher equipped with standard gearcases only.
If your engine has a BigFoot or Command Thrust gearcase, use the BigFoot / Command Thrust kits linked below instead.
What is Included
| Included Component | Application |
|---|---|
| Oil Filter | Engine oil filtration service |
| Fuel Filters | Fuel system maintenance |
| Spark Plugs | Ignition system maintenance |
| Water Pump Components | Cooling system service |
| Thermostat Components | Cooling system maintenance |
| Drain & Vent Seals | Gearcase service |
| Mercury 10W30 Engine Oil | Engine oil service |
| Mercury Gear Lube | Gearcase lubricant service |
Prefer to Choose a Different Oil?
Some customers prefer to purchase a different Mercury oil, including Mercury 25W40, Synthetic Blend, or Full Synthetic options.
If you prefer to choose your own engine oil and gear lube, order the standard 300 hour kit below.
Order 8M0113483 - Oil and Gear Lube Sold SeparatelyIncluded Oil & Gear Lube Information
This kit includes Mercury 10W30 engine oil and gear lube for the complete 300 hour maintenance service.
Mercury 40-60HP FourStroke EFI engines use approximately 4 quarts of engine oil, or 1 gallon.
Standard gearcase applications use approximately 1 quart of gear lube.
BigFoot / Command Thrust 300 Hour Kits
300 Hour Kit - BigFoot / Command Thrust
Use this kit for Mercury 40-60HP EFI outboards with BigFoot or Command Thrust gearcases. Oil and gear lube sold separately.
View Product
300 Hour Kit With Oil - BigFoot / Command Thrust
Complete 300 hour maintenance kit with oil and gear lube for compatible BigFoot and Command Thrust gearcase models.
View ProductWhat This Service Kit is Used For
The Mercury 8M0113483-L service kit is used for 300 hour maintenance on compatible Mercury 40HP, 50HP, and 60HP FourStroke EFI outboards equipped with standard gearcases.
A 300 hour maintenance service is more extensive than a standard 100 hour service and commonly includes fuel system maintenance, cooling system service, spark plug replacement, water pump service, oil service, and gearcase maintenance.
Key Features and Benefits
- OEM Mercury 300 hour service kit
- Fits Mercury 40HP, 50HP, and 60HP FourStroke EFI outboards
- Fits serial numbers 1C000001 and higher
- For standard gearcase models only
- Includes Mercury 10W30 engine oil
- Includes gear lube for gearcase service
- Alternative kit available for customers preferring different oils
- BigFoot / Command Thrust kits linked above
Service Kit Details
- Part Number: 8M0113483-L
- Base Kit: 8M0113483
- Application: Mercury 40-60HP FourStroke EFI Outboards
- Serial Range: 1C000001 & Higher
- Gearcase Type: Standard Gearcase
- Service Interval: 300 Hour Maintenance
- Oil Included: Mercury 10W30
- Gear Lube Included: Yes
FAQ
What engines does this kit fit?
This kit fits Mercury 40HP, 50HP, and 60HP FourStroke EFI outboards
with serial numbers 1C000001 and higher equipped with standard gearcases.
Does this fit BigFoot or Command Thrust gearcases?
No. BigFoot and Command Thrust kits are linked above.
Does this kit include oil and gear lube?
Yes. This kit includes Mercury 10W30 engine oil and gear lube.
What if I prefer a different oil?
Customers who prefer different Mercury oil options can order
the standard 8M0113483 kit and select their preferred oil separately.
How much engine oil does this motor use?
Approximately 4 quarts or 1 gallon.
How much gear lube is required?
Approximately 1 quart for standard gearcase models.
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.
- Maintenance kits must be new, unused, and in original packaging.
- Opened oil and lubricants 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
8M0113483-L, 8M0113483, 8M0090559, 8M0090559-L, Mercury 40HP 300 hour kit with oil, Mercury 50HP 300 hour kit with oil, Mercury 60HP 300 hour kit with oil, Mercury standard gearcase 300 hour kit, Mercury standard gearcase maintenance kit, Mercury 300 hour kit with 10W30, Mercury serial 1C000001 300 hour kit, Mercury FourStroke EFI 300 hour service, Mercury BigFoot 300 hour kit, Mercury Command Thrust 300 hour kit, Mercury 40-60HP maintenance kit with oil
OEM Mercury 100 Hour Service Kit With Oil
Mercury 5.7L V10 350HP-425HP Verado 100 Hour Maintenance Kit
This OEM Mercury 100 hour service kit with oil is designed for Mercury 5.7L V10 350HP-425HP Verado outboards. It includes the routine 100 hour maintenance components along with Mercury 25W40 engine oil for engine oil service.
Important: This kit includes engine oil, but it does not include gear lube. Mercury V10 standard rotation and counter rotation gearcases require different gear lube quantities, so gear lube should be selected separately below.
Compatible Applications
| Engine Platform | Horsepower Range | Displacement | Application Notes |
|---|---|---|---|
| Mercury Verado V10 | 350HP-425HP | 5.7L FourStroke | All Mercury 5.7L V10 Verado outboards |
This kit includes Mercury 25W40 engine oil, but it does not include gear lube.
Standard rotation Mercury V10 gearcases use approximately 1 quart of gear lube.
Counter rotation Mercury V10 gearcases use approximately 2.3 quarts, so customers should order 3 quarts for proper service.
If you do not want the kit with included 25W40 engine oil, use the no-oil version and select your oil separately.
View Mercury V10 100 Hour Service Kit Without Oil
What is Included
| Included Component | Application |
|---|---|
| OEM Mercury 100 hour maintenance components | Scheduled Mercury V10 service interval |
| OEM Mercury oil filter | Engine oil filtration service |
| OEM Mercury fuel filter components | Fuel system maintenance |
| OEM Mercury drain seals and service components | Routine maintenance replacement items |
| Mercury 25W40 engine oil | Engine lubrication service |
Gear Lube Options - Sold Separately
| Gear Lube | Product | Quantity Required |
|---|---|---|
| Premium 80W90 Gear Lube | Mercury Premium 80W90 Gear Lube | Standard rotation: 1 quart Counter rotation: 3 quarts |
| Extreme Performance 85W90 Gear Lube | Mercury Extreme Performance Gear Lube | Standard rotation: 1 quart Counter rotation: 3 quarts |
Complete Your Service
300 Hour Service Kit Without Oil
OEM Mercury 300 hour service kit for Mercury 5.7L V10 350HP-425HP outboards without engine oil or gear lube.
View Product
300 Hour Service Kit With Oil
Complete OEM Mercury 300 hour service kit with oil for Mercury 5.7L V10 350HP-425HP Verado engines.
View Product
Mercury V10 Anode Kit
OEM Mercury anode kit for Mercury 5.7L V10 350HP-425HP Verado outboards.
View ProductWhat This Service Kit is Used For
This OEM Mercury 100 hour service kit with oil is used for scheduled maintenance on compatible Mercury 5.7L V10 Verado 350HP-425HP outboards.
The included Mercury 25W40 engine oil helps simplify routine engine oil service while the OEM Mercury maintenance components support proper 100 hour service.
Because standard rotation and counter rotation gearcases use different amounts of gear lube, this kit does not include gear lube. Customers should choose the proper gear lube and quantity separately.
Customers performing service should also inspect anodes, gear lube, filters, and any 300-hour maintenance items depending on engine hours and service history.
Key Features and Benefits
- OEM Mercury 100 hour maintenance kit with engine oil
- Fits Mercury 5.7L V10 350HP-425HP Verado outboards
- Includes Mercury 25W40 engine oil
- Designed for scheduled 100 hour service
- Does not include gear lube
- Allows customers to select the correct gear lube quantity separately
- Pairs with Mercury V10 300-hour and anode maintenance kits
- Helps support long-term engine reliability and performance
Service Kit Details
- Kit Part Number: 8M0207807-L
- Brand: Mercury Marine
- Application: Mercury 5.7L V10 Verado Outboards
- Horsepower Range: 350HP-425HP
- Service Interval: 100 Hour Maintenance
- Engine Oil Included: Yes - Mercury 25W40
- Gear Lube Included: No
- Standard Rotation Gear Lube Required: Approximately 1 quart
- Counter Rotation Gear Lube Required: Approximately 2.3 quarts - order 3 quarts
- Related Maintenance: 300-hour service and anode replacement
FAQ
What engines does this 100 hour service kit fit?
This kit fits Mercury 5.7L V10 Verado 350HP-425HP outboards.
Does this kit include engine oil?
Yes. This version includes Mercury 25W40 engine oil.
Does this kit include gear lube?
No. Gear lube is not included because standard rotation and counter
rotation gearcases use different amounts.
How much gear lube should I order?
Standard rotation gearcases use approximately 1 quart. Counter rotation
gearcases use approximately 2.3 quarts, so order 3 quarts for
counter rotation service.
Is there a 100 hour kit without oil?
Yes. The 8M0207807 version does not include oil or gear lube and is linked above.
Should I also replace anodes during service?
Anodes should be inspected regularly and replaced when worn. The Mercury
V10 anode kit is shown above for complete corrosion protection service.
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.
- Maintenance kits and lubricants must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0207807-L, Mercury V10 100 hour service kit with oil, Mercury 5.7L V10 service kit, Mercury Verado V10 maintenance kit, Mercury 350HP service kit, Mercury 400HP service kit, Mercury 425HP service kit, Mercury V10 kit with oil, Mercury 25W40 oil, Mercury V10 gear lube not included, Mercury Premium 80W90 gear lube, Mercury Extreme Performance gear lube, Mercury V10 300 hour kit, Mercury V10 anode kit, Mercury Verado maintenance parts
Ignition System
Genuine Mercury Spark Plug - 8M0180173
OEM Mercury Iridium Spark Plug for 500-600hp V12 outboards.
Delivers reliable ignition, improved combustion efficiency, and longer service life.
Compatible Applications
Mercury V12 Outboards. Verify with your engine serial number for exact fitment.
Important Fitment Note
Always confirm compatibility using your engine serial number before ordering.
OEM & Cross Reference Numbers
| OEM | 8M0180173, 8M0178257 |
What This Part Is Used For
This iridium spark plug provides reliable ignition for Mercury V12 outboard engines.
Replacing spark plugs at recommended intervals improves starting, performance, and fuel efficiency.
Key Features and Benefits
- Genuine Mercury OEM quality
- Iridium electrode for longer life and better spark
- Optimized for high-performance V12 engines
- Improves combustion efficiency
FAQ
What engines does this spark plug fit?
Mercury V12 outboards. Verify with serial number.
How often should spark plugs be replaced?
Follow the Mercury service schedule for your specific model (typically every 100-200 hours or annually).
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
Mercury V12 spark plug, 8M0180173, Mercury outboard spark plug, V12 iridium spark plug, 8M0178257
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Searchable Part Numbers
8M0180173 8M0178257
8M0180173
OEM Mercury Gearcase Drain Plug Seal Washer
Mercury Drain Plug Seal 8M0204693 Replaces 830749
The Mercury 8M0204693 drain plug seal is a genuine OEM Mercury sealing washer used on many Mercury and Mariner outboards, Mercury Racing lower units, Verado gearcases, and MerCruiser sterndrives.
This seal replaces Mercury part number 830749 and is commonly used on lower unit drain screws, vent screws, and gear lube fill plugs to help prevent gearcase lubricant leaks during operation and storage.
Common Compatible Applications
| Application Family | Common Models | Use Location | OEM References |
|---|---|---|---|
| Mercury & Mariner Outboards | EFI, DFI, Optimax, FourStroke, SeaPro, Pro XS | Gearcase Drain & Fill Screws | 8M0204693, 830749 |
| Mercury Verado | L4, L6, V6 & V8 Verado Models | Lower Unit Drain & Vent Screws | 8M0204693, 830749 |
| Mercury Racing | 150R, 200R, 250R, 300R, 450R, 500R | SportMaster & Racing Gearcases | 8M0204693, 830749 |
| Mercury Racing Gearcases | SportMaster, TorqueMaster, HD Lower Units | Drain & Fill Screw Seal | 8M0204693, 830749 |
| MerCruiser Sterndrives | Alpha, Bravo, Blackhawk, NXT | Gear Lube Drain & Vent Screws | 8M0204693, 830749 |
| MerCruiser Performance Drives | M-Series, Zeus, Vazer | Gearcase Drain Plug Seal | 8M0204693, 830749 |
Mercury uses this drain plug sealing washer across a very large number of outboard lower units, Verado gearcases, Racing gearcases, and MerCruiser sterndrive applications.
The best way to confirm fitment is by matching your original seal or OEM part number.
Common OEM references include: 8M0204693 and 830749.
OEM Part Numbers & Cross References
| Brand | Part Number |
|---|---|
| Mercury | 8M0204693 |
| Mercury | 830749 |
What This Drain Plug Seal is Used For
The Mercury 8M0204693 seal washer is used during lower unit and sterndrive gear lube service to help seal drain screws and vent screws against lubricant leaks.
Replacing the seal washer during gear lube service helps maintain proper sealing pressure and helps reduce the risk of water intrusion into the gearcase.
Mercury recommends replacing drain plug seals during routine lower unit service and gear lube changes.
Key Features and Benefits
- Genuine OEM Mercury drain plug seal washer
- Replaces Mercury part number 830749
- Fits many Mercury outboards and MerCruiser sterndrives
- Fits Verado, Pro XS, Racing, FourStroke, and Optimax applications
- Fits many SportMaster and TorqueMaster gearcases
- Commonly used during lower unit gear lube service
- Helps prevent gear lube leaks and water intrusion
- Used on drain screws, vent screws, and fill plugs
- Designed for harsh marine environments
Part Details
- Part Number: 8M0204693
- Supersedes: 830749
- Product Type: Drain Plug Seal Washer
- Brand: Mercury Marine
- Application: Mercury Outboards & MerCruiser Drives
- Use Location: Lower Unit Drain, Fill & Vent Screws
- OEM Mercury Part: Yes
FAQ
What does Mercury 8M0204693 replace?
This drain plug seal replaces Mercury part number 830749.
What is this seal used for?
It seals lower unit drain screws, vent screws, and gear lube fill plugs
on Mercury outboards and MerCruiser sterndrives.
Does this fit Mercury Racing lower units?
Yes. This seal is commonly used on Mercury Racing SportMaster,
TorqueMaster, and HD lower units including 300R, 450R, and 500R applications.
Does this fit MerCruiser sterndrives?
Yes. This seal is used on many Alpha, Bravo, Blackhawk, NXT, Zeus,
and M-Series sterndrives.
Should drain plug seals be replaced during service?
Yes. Mercury recommends replacing drain plug seals during routine
gear lube service to help prevent leaks and water intrusion.
Is this a genuine Mercury part?
Yes. This is a genuine OEM Mercury Marine drain plug sealing washer.
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 seals and washers 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
8M0204693, 830749, Mercury drain plug seal, Mercury drain screw washer, Mercury gearcase washer, Mercury lower unit seal, Mercury gear lube washer, Mercury vent screw seal, Mercury drain plug gasket, Verado drain plug seal, Mercury Pro XS drain seal, Mercury Racing drain washer, Mercury 500R drain plug seal, Mercury 450R drain plug washer, SportMaster drain plug seal, TorqueMaster washer, Mercury Bravo drain washer, Mercury Alpha drain washer, MerCruiser drain plug seal, MerCruiser Bravo washer, MerCruiser Alpha washer, Mercury gearcase drain seal, Mercury lower unit washer, Mercury fill screw seal, Mercury OEM washer
18-2430-9
18-24301-9
8M0204693
830749
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
Mercury Verado Gen A/B Power Steering Hose Kit 8M0078213
Mercury Verado hydraulic power steering hose kit 8M0078213 for Verado systems using the Generation A / Generation B power steering pump. This kit includes both 16ft helm-to-pump hoses: the non-pressure return hose and the pressure-side hose.
Important Application Note
This hose kit is for Mercury Verado hydraulic power steering systems that use the Generation A / Generation B style power steering pump. Always verify your pump style, hose routing, and required hose length before ordering.
Compatible Applications
If you are converting, replacing, or refreshing a Verado Gen A/B hydraulic steering setup, confirm that 16ft hoses are the correct length for your boat layout.
What is Included
Recommended Damper Hose for Noise Reduction
The pressure-side fitting on this hose kit can connect directly into the Mercury Verado power steering pump. However, to help minimize steering system noise, it is recommended to install the Mercury damper hose between the pressure hose and the pump.
Recommended part: Mercury Verado Power Steering Damper Hose 897643A01 .
Related Verado Power Steering Parts
Shorter Verado Hose Kit
Need the shorter version of this Mercury Verado helm-to-power-steering-pump hose kit? Use 8M0078210 for the shorter hose option.
View Shorter Hose Kit
Verado Power Steering Damper Hose
Recommended between the pressure-side hose and the power steering pump to help reduce noise in Mercury Verado hydraulic steering systems.
View Damper Hose
Gen A/B Power Steering Pump Replacement
Replacement power steering pump option for Mercury Verado Generation A and Generation B hydraulic steering systems.
View Power Steering PumpWhat This Hose Kit is Used For
This Mercury Verado power steering hose kit connects the helm to the Generation A / Generation B power steering pump in a hydraulic Verado steering system. The kit includes both the pressure-side hose and the non-pressure return-side hose required for the helm-to-pump connection.
It is commonly used when replacing worn hoses, converting to a Gen A/B Verado pump setup, or completing a Mercury Verado hydraulic power steering repair.
Verado Power Steering Help
Mercury Verado Power Steering Walkthrough
Need help understanding Mercury Verado power steering pumps, hose routing, and Gen A/B steering system components? View our walkthrough for additional guidance before ordering.
View Verado Power Steering WalkthroughKey Features and Benefits
Includes both 16ft helm-to-pump hoses for pressure and non-pressure routing.
Designed for Mercury Verado systems using the Gen A / Gen B power steering pump style.
Pressure-side hose can connect directly to the pump, with damper hose recommended for noise reduction.
Useful for Verado power steering repairs, hose replacement, and Gen A/B pump conversion setups.
FAQ
What does this Mercury Verado hose kit include?
This kit includes a 16ft helm-to-power-steering-pump non-pressure hose and a 16ft helm-to-power-steering-pump pressure-side hose.
Does the pressure hose connect directly to the pump?
Yes, the pressure-side fitting can connect directly into the power steering pump. For noise reduction, Pro Marine recommends adding damper hose 897643A01 between the hose and pump.
What power steering pump does this hose kit work with?
This hose kit is intended for Mercury Verado hydraulic power steering systems using the Generation A / Generation B power steering pump style.
Is there a shorter version of this hose kit?
Yes. If you need the shorter Mercury Verado helm-to-pump hose kit, use 8M0078210.
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 Part Numbers
8M0078213, Mercury 8M0078213, Verado power steering hose, Mercury Verado helm to pump hose, Gen A power steering hose, Gen B power steering hose, Verado hydraulic steering hose, 897643A01, 8M0078210, 8M0134736P, Mercury Verado power steering pump, Verado damper hose
Mercury Verado Gen A/B Power Steering Hose Kit 8M0078210
Mercury Verado hydraulic power steering hose kit 8M0078210 for Verado systems using the Generation A / Generation B power steering pump. This kit includes both 10ft helm-to-pump hoses: the non-pressure return hose and the pressure-side hose.
Important Application Note
This 10ft hose kit is for Mercury Verado hydraulic power steering systems that use the Generation A / Generation B style power steering pump. Always verify your pump style, hose routing, and required hose length before ordering.
Compatible Applications
If you are converting, replacing, or refreshing a Verado Gen A/B hydraulic steering setup, confirm that 10ft hoses are the correct length for your boat layout.
What is Included
Recommended Damper Hose for Noise Reduction
The pressure-side fitting on this hose kit can connect directly into the Mercury Verado power steering pump. However, to help minimize steering system noise, it is recommended to install the Mercury damper hose between the pressure hose and the pump.
Recommended part: Mercury Verado Power Steering Damper Hose 897643A01 .
Related Verado Power Steering Parts
Longer 16ft Verado Hose Kit
Need the longer version of this Mercury Verado helm-to-power-steering-pump hose kit? Use 8M0078213 for the 16ft hose option.
View 16ft Hose Kit
Verado Power Steering Damper Hose
Recommended between the pressure-side hose and the power steering pump to help reduce noise in Mercury Verado hydraulic steering systems.
View Damper Hose
Gen A/B Power Steering Pump Replacement
Replacement power steering pump option for Mercury Verado Generation A and Generation B hydraulic steering systems.
View Power Steering PumpWhat This Hose Kit is Used For
This Mercury Verado power steering hose kit connects the helm to the Generation A / Generation B power steering pump in a hydraulic Verado steering system. The kit includes both the pressure-side hose and the non-pressure return-side hose required for the helm-to-pump connection.
It is commonly used when replacing worn hoses, converting to a Gen A/B Verado pump setup, or completing a Mercury Verado hydraulic power steering repair where a 10ft hose length is required.
Verado Power Steering Help
Mercury Verado Power Steering Walkthrough
Need help understanding Mercury Verado power steering pumps, hose routing, and Gen A/B steering system components? View our walkthrough for additional guidance before ordering.
View Verado Power Steering WalkthroughKey Features and Benefits
Includes both 10ft helm-to-pump hoses for pressure and non-pressure routing.
Designed for Mercury Verado systems using the Gen A / Gen B power steering pump style.
Pressure-side hose can connect directly to the pump, with damper hose recommended for noise reduction.
Useful for Verado power steering repairs, hose replacement, and Gen A/B pump conversion setups.
FAQ
What does this Mercury Verado hose kit include?
This kit includes a 10ft helm-to-power-steering-pump non-pressure hose and a 10ft helm-to-power-steering-pump pressure-side hose.
Does the pressure hose connect directly to the pump?
Yes, the pressure-side fitting can connect directly into the power steering pump. For noise reduction, Pro Marine recommends adding damper hose 897643A01 between the hose and pump.
What power steering pump does this hose kit work with?
This hose kit is intended for Mercury Verado hydraulic power steering systems using the Generation A / Generation B power steering pump style.
Is there a longer version of this hose kit?
Yes. If you need the longer 16ft Mercury Verado helm-to-pump hose kit, use 8M0078213.
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 Part Numbers
8M0078210, Mercury 8M0078210, Verado power steering hose, Mercury Verado helm to pump hose, Gen A power steering hose, Gen B power steering hose, Verado hydraulic steering hose, 897643A01, 8M0078213, 8M0134736P, Mercury Verado power steering pump, Verado damper hose, 10ft Verado hose kit