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Honda Outboard Parts
Shop OEM and aftermarket Honda outboard parts for maintenance, repair, troubleshooting, and complete engine service projects. Browse Honda marine parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, steering, trim, and routine maintenance items.
Pro Marine USA carries Honda outboard engine parts for a wide range of BF-series Four Stroke applications, from portable engines through high-horsepower offshore models. Use your engine model, horsepower, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Honda Outboard Parts by System
- Control Cables and Boxes
- Cooling System
- Electrical System
- Engine Oil
- Fuel and Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Steering Systems
- Transom and Midsection
- Trim System
Find the Correct Honda Outboard Part
Honda outboard parts can vary by engine model, horsepower, serial number range, and production year. If you are unsure which component fits your engine, use the OEM parts lookup to identify the original Honda part number from a factory parts diagram.
Once you have the OEM part number, search Pro Marine to find available genuine Honda and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Honda Outboard Engine Families
Pro Marine supports many Honda BF-series outboards across a wide horsepower range. Always confirm the exact engine model and serial information before ordering parts.
- Portable: Honda BF2 through BF20 applications
- Midrange: BF25 through BF90 engine families
- Large Four Stroke: BF100 through BF150 applications
- High-Horsepower Offshore: BF200, BF225, BF250, and newer large-displacement Honda platforms
- Four Stroke: Honda marine outboards across modern BF-series engine families
Common Honda Outboard Repair Areas
- Engine overheating: inspect the water pump, impeller, thermostat, cooling passages, pressure-control components, and engine anodes.
- Hard starting or rough running: inspect fuel pumps, filters, injectors or carburetors, spark plugs, ignition components, and intake sealing.
- Charging or electrical problems: inspect ignition coils, charging components, sensors, wiring, grounds, and related electrical parts.
- Low compression or power loss: inspect valves, pistons, rings, cylinder condition, bearings, gaskets, and internal engine components.
- Lower unit noise or water intrusion: inspect prop shaft seals, driveshaft seals, shift shaft seals, bearings, gears, and gear lube condition.
- Trim or steering problems: inspect trim motors, hydraulic components, steering systems, hoses, seals, and related rigging parts.
Why Buy Honda Outboard Parts from Pro Marine USA?
- OEM Honda and aftermarket replacement options for many common applications.
- Parts for routine maintenance, professional repair, lower units, fuel systems, electrical systems, steering, trim, and internal engine work.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of Honda cooling, fuel, electrical, lower unit, steering, and service components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Honda outboard part?
Start with the engine model, horsepower, serial number, and production year whenever available. Use the OEM parts lookup to identify the original Honda part number from the factory diagram.
Can I search Honda parts by OEM part number?
Yes. Enter the Honda OEM part number into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
Do Honda outboard parts vary by model and serial number?
Yes. Honda may use different components across engines with similar horsepower depending on model, production range, and serial number. Confirm the complete engine identification information before ordering.
Do you carry parts for Honda BF-series outboards?
Yes. Pro Marine carries parts for many Honda BF-series applications, from portable engines through large Four Stroke offshore models, including cooling, fuel, electrical, internal engine, lower unit, steering, and trim components.
Do you carry both OEM and aftermarket Honda parts?
Yes. Pro Marine offers genuine Honda parts along with aftermarket replacement parts for many common Honda outboard maintenance and repair applications.
What Honda outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and model-specific service components.
Fitment Tip: Honda outboard parts can vary by model, horsepower, serial number range, and production year. Confirm the OEM part number or complete engine identification information whenever possible before ordering.
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702755021407
OEM Mercury Extreme Performance Gear Lube
85W90 Racing & High-Performance Marine Gear Lubricant
Mercury Extreme Performance Gear Lube 8M0111677 is an 85W90 gear lubricant designed for outboard and sterndrive racing applications.
It is also built for high-performance gear cases used in marine, powersports, and motorsports applications where maximum wear protection, heat resistance, and oil film strength are critical.
Compatible Applications
| Application | System Type | Use | Notes |
|---|---|---|---|
| Outboard Racing | High-Performance Gearcase | Extreme Gear Protection | Designed for racing outboard applications |
| Sterndrive Racing | Sterndrive Gear Housing | High-Load Lubrication | Designed for sterndrive racing applications |
| High-Performance Marine Gearcases | Gearcase / Lower Unit | Wear & Heat Protection | For demanding marine performance use |
| Powersports & Motorsports | High-Performance Gear Cases | Extreme Pressure Protection | For compatible gearcase applications requiring 85W90 |
For standard recreational marine lower units, Mercury Premium 80W90 gear lube may be the better choice.
View Mercury Premium Gear Lube 80W90
OEM Part Numbers & Product Information
| Type | Details |
|---|---|
| Mercury Part Number | 8M0111677 |
| Product Type | Extreme Performance Marine Gear Lube |
| Viscosity | SAE 85W90 |
| Application | Racing & High-Performance Gearcases |
| Brand | Mercury Marine |
What This Gear Lube is Used For
Mercury Extreme Performance Gear Lube is used in outboard and sterndrive racing applications where gearcases operate under extreme load, high temperature, and high-performance conditions.
It is also suitable for compatible high-performance gear cases used in marine, powersports, and motorsports applications requiring an 85W90 extreme performance gear lubricant.
The formula includes tackifiers and pressure additives that improve oil film adhesion and help protect gears from excessive wear.
Advanced emulsifiers help protect internal gearcase components if water enters the gear housing, helping maintain protection in harsh marine environments.
Key Features and Benefits
- OEM Mercury Extreme Performance Gear Lube
- SAE 85W90 gear lubricant
- Designed for outboard and sterndrive racing applications
- Also for high-performance marine, powersports, and motorsports gearcases
- Provides maximum protection against gear and bearing wear
- Tackifiers and pressure additives improve oil film adhesion
- Helps prevent excessive wear under high-load conditions
- Helps prevent horsepower loss and resists breakdown at high gear temperatures
- Advanced emulsifiers protect gears if water enters the gear housing
Gear Lube Details
- Brand: Mercury Marine
- Part Number: 8M0111677
- Product Type: Extreme Performance Gear Lube
- Viscosity: SAE 85W90
- Use: Racing and high-performance gearcase lubrication
- Applications: Outboard, sterndrive, marine, powersports, and motorsports gearcases
- Protection: Wear, heat, pressure, and water-contamination protection
- Recommended Service: Change once each year when winterizing or every 100 hours of operation
FAQ
What is Mercury Extreme Performance Gear Lube used for?
It is designed for outboard and sterndrive racing applications and other compatible high-performance gearcases.
What viscosity is this gear lube?
This Mercury Extreme Performance Gear Lube is SAE 85W90.
How is this different from Mercury Premium 80W90 Gear Lube?
Extreme Performance Gear Lube is intended for racing and high-performance gearcases, while Premium 80W90 is typically used for standard recreational marine lower units.
Does this help if water enters the gear housing?
Yes. Mercury states that advanced emulsifiers help protect gears if water enters the gear housing.
How often should this gear lube be changed?
Mercury recommends changing it once each year when winterizing the engine or every 100 hours of operation.
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.
- Lubricants and chemicals must remain unopened and unused for return eligibility.
- Items must be in original packaging and resalable condition.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
8M0111677, Mercury Extreme Performance Gear Lube, Mercury 85W90 gear lube, Mercury racing gear lube, Mercury high performance gear oil, Mercury outboard racing gear lube, Mercury sterndrive racing gear lube, 85W90 marine gear lubricant, extreme performance marine gear oil, Mercury gearcase lubricant, Mercury performance gearcase oil, racing lower unit gear lube
Pro Marine 5/16" Outboard Fuel Primer Bulb
Pro Marine 8004 5/16" Marine Fuel Primer Bulb
The Pro Marine 8004 Primer Bulb is designed for marine fuel-line systems using 5/16" inside-diameter fuel hose. It can be used when building or repairing custom outboard fuel-line assemblies using compatible Type A, Type B or Mercury OEM 5/16" fuel hose.
Primer bulbs allow the operator to manually draw fuel through the fuel line and toward the engine before starting. This helps fill an empty fuel line, purge air from the system and supply fuel to the engine during initial startup.
Pro Marine stocks multiple 5/16" bulk marine fuel-hose options, the correct Oetiker clamp for each hose, and the tools required to properly install the clamps.
Primer Bulb: Pro Marine 8004
Hose Size: 5/16" ID
Application: Marine / Outboard Fuel Line
Type B Hose: MPI 315-056
Type A Hose: MPI 313-1
Mercury OEM Hose: #100 Silver Fuel Hose
What This Primer Bulb is Used For
A primer bulb is installed inline in an outboard fuel hose and acts as a manual fuel pump.
Squeezing and releasing the bulb draws fuel from the tank and pushes it toward the engine. Internal one-way check valves help keep fuel moving in the proper direction.
Primer bulbs are commonly used when:
- Starting an outboard after the fuel line has drained
- Priming a newly installed fuel line
- Refilling the line after fuel-system service
- Purging air from the fuel hose
- Replacing an old, hardened or damaged primer bulb
Compatible 5/16" Fuel Hose Options
Pro Marine stocks three common 5/16" fuel-hose options that can be used with this primer bulb. The correct hose depends on the installation and required fuel-hose classification.
MPI 5/16" Type B Fuel Hose - 315-056
5/16" Type B marine fuel hose commonly used in exposed and above-deck applications where Type B hose is appropriate.
Inside Diameter: 5/16"
Sold: By the Foot
Matching Clamp: Oetiker 4-153
MPI 5/16" Type A Fuel Hose - 313-1
Type A marine fuel hose for installations requiring the additional Type A fire-resistant classification.
Inside Diameter: 5/16"
Sold: By the Foot
Matching Clamp: Oetiker 4-170
Mercury OEM 5/16" Silver Fuel Hose
Genuine Mercury Marine bulk 5/16" fuel hose for compatible Mercury outboard fuel-line applications.
Inside Diameter: 5/16"
Sold: By the Foot
Matching Clamp: Oetiker 4-145
Correct Clamp for Each 5/16" Fuel Hose
All three hoses have a 5/16" inside diameter, but they do not have the same outside diameter. Different constructions and wall thicknesses require different Oetiker clamp sizes.
| Fuel Hose | Hose Type | Correct Clamp | Primer Bulb |
|---|---|---|---|
| MPI 315-056 | Type B | Oetiker 4-153 | Pro Marine 8004 |
| MPI 313-1 | Type A | Oetiker 4-170 | Pro Marine 8004 |
| Mercury OEM #100 | Mercury Silver Fuel Hose | Oetiker 4-145 | Pro Marine 8004 |
Do not choose a clamp based only on the hose's 5/16" inside diameter.
Match the Oetiker clamp to the specific hose:
MPI Type B 315-056 = Oetiker 4-153
MPI Type A 313-1 = Oetiker 4-170
Mercury OEM Silver Hose #100 = Oetiker 4-145
Fuel Line Clamps and Installation Tools
Oetiker 4-153 Ear Clamp - 10 Pack
Correct clamp for the MPI 315-056 5/16" Type B fuel hose.
View Oetiker 4-153 Clamp
Oetiker 4-170 Ear Clamp - 10 Pack
Correct clamp for the MPI 313-1 5/16" Type A fuel hose.
View Oetiker 4-170 Clamp
Oetiker 4-145 Ear Clamp - 10 Pack
Correct clamp for the Mercury OEM 5/16" silver fuel hose.
View Oetiker 4-145 Clamp
Oetiker Standard Jaw Pincer Tool
Installation tool for properly closing Oetiker ear clamps when assembling marine fuel-line connections.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
Assortment of common Oetiker clamp sizes with the installation tool included. A convenient option for marine shops and technicians working with multiple hose sizes.
View Oetiker Clamp PackHow a Primer Bulb Works
The primer bulb contains internal one-way check valves. When the bulb is squeezed and released, the valves allow fuel to move in one direction through the hose.
Repeatedly squeezing the bulb draws fuel from the fuel tank, fills the fuel line and supplies fuel toward the engine.
Primer Bulb Installation
Install the primer bulb with the fuel-flow arrow pointing toward the engine.
Secure each hose connection using the correct clamp for the specific fuel hose being installed.
When Should a Primer Bulb Be Replaced?
Primer bulbs are continually exposed to fuel, heat and the marine environment and can deteriorate over time.
Inspect or replace the primer bulb if you notice:
- Cracking or visible deterioration
- A bulb that has become excessively hard
- A bulb that stays collapsed
- A bulb that will not become firm when priming
- Fuel leaking around the bulb or hose connections
- Air entering the fuel system
- Internal check-valve problems
Building a Complete 5/16" Outboard Fuel Line
Depending on the installation, a complete 5/16" fuel-line assembly may require:
- Pro Marine 8004 5/16" primer bulb
- 5/16" Type A, Type B or Mercury OEM fuel hose
- Correct tank-side connector or fitting
- Correct engine-side connector or fitting
- Correct Oetiker clamps for the selected hose
- Oetiker pincer installation tool
Type A, Type B or Mercury OEM Fuel Hose?
The Pro Marine 8004 primer bulb fits all three listed hose options because each hose has a 5/16" inside diameter.
The difference is in the hose construction and intended installation.
MPI Type B 315-056 is commonly used in exposed and above-deck applications where Type B hose is permitted.
MPI Type A 313-1 is used where the installation requires the additional Type A fire-resistant classification.
Mercury OEM #100 is the genuine Mercury 5/16" silver fuel-hose option for compatible Mercury fuel-line applications.
Key Features
- Pro Marine 8004 marine fuel primer bulb
- Designed for 5/16" ID fuel hose
- Compatible with MPI 315-056 Type B hose
- Compatible with MPI 313-1 Type A hose
- Compatible with Mercury OEM #100 5/16" silver hose
- Used to manually prime outboard fuel systems
- Helps draw fuel from the tank toward the engine
- Matching Oetiker clamps available for each hose
- Oetiker pincer installation tool available
- Complete Oetiker clamp assortment with tool available
Need Help Building Your Marine Fuel Line?
Hose size, fuel-hose classification, primer bulb size and clamp selection all need to match the fuel-system installation.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size hose does the Pro Marine 8004 primer bulb fit?
The 8004 is designed for 5/16" ID fuel hose.
Can I use this primer bulb with MPI Type B hose?
Yes. It fits the
MPI 315-056 5/16" Type B fuel hose
.
Can I use it with Type A hose?
Yes. It also fits the
MPI 313-1 5/16" Type A fuel hose
.
Can I use it with Mercury OEM 5/16" silver fuel hose?
Yes. The
Mercury OEM #100 5/16" silver hose
also has a 5/16" inside diameter.
Which clamp fits MPI 315-056 Type B hose?
Use the
Oetiker 4-153 ear clamp
.
Which clamp fits MPI 313-1 Type A hose?
Use the
Oetiker 4-170 ear clamp
.
Which clamp fits the Mercury OEM 5/16" hose?
Use the
Oetiker 4-145 ear clamp
.
Why do all three 5/16" hoses use different clamps?
The 5/16" measurement refers to the inside diameter. Each hose has a
different construction and outside diameter, so each requires the correct
clamp matched to that hose.
Which direction should the primer bulb be installed?
Install it with the fuel-flow arrow pointing toward the engine.
What tool is used to install Oetiker clamps?
Use the
Oetiker Standard Jaw Pincer Tool
.
Do you sell a clamp assortment?
Yes. The
Oetiker Clamp Pack with Tool
includes common clamp sizes and the installation tool.
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 in the continental U.S.
- 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 choosing the correct fuel-line parts?
Contact Pro Marine
Phone: 941-721-3000
Searchable Part Numbers & Terms
8004, Pro Marine 8004, 5/16 primer bulb, 5/16 marine primer bulb, outboard primer bulb, boat fuel primer bulb, marine fuel bulb, outboard fuel bulb, 5/16 fuel line, 5/16 outboard fuel hose, 315-056, MPI 315-056, 5/16 Type B fuel hose, 313-1, MPI 313-1, 5/16 Type A fuel hose, Mercury fuel hose 100, Mercury 5/16 silver fuel hose, Oetiker 4-153, Oetiker 4-170, Oetiker 4-145, marine fuel line clamp, Oetiker fuel line clamp, primer bulb fuel line, marine fuel system, outboard fuel line
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