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Mercury Outboard Parts
Shop OEM and aftermarket Mercury outboard parts for maintenance, repair, troubleshooting, and complete engine rebuild projects. Browse Mercury marine parts by system, including cooling, fuel delivery, electrical and ignition, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Mercury outboard engine parts for a wide range of 2-stroke, FourStroke, EFI, Optimax, Pro XS, SeaPro, and Verado applications. Use your engine horsepower, model, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Mercury Outboard Parts 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
Find the Correct Mercury Outboard Part
Mercury outboard parts can vary by horsepower, engine family, model year, and serial number range. If you are unsure which component fits your engine, use the OEM parts lookup to locate the original Mercury part number from an engine diagram.
Once you have the OEM part number, search Pro Marine to find available genuine Mercury and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Mercury Outboard Engine Families
Pro Marine supports many Mercury outboard applications across a wide horsepower range. Always confirm the engine serial number and model information before ordering parts.
- Portable and Midrange: Mercury 2.5HP through 60HP 2-stroke and FourStroke applications
- FourStroke and EFI: common 75HP through 300HP Mercury EFI and FourStroke platforms
- Pro XS: performance-oriented Mercury Pro XS outboards across multiple engine families
- Optimax: direct-injected 2-stroke Mercury Optimax engines, commonly 75HP through 250HP
- Verado: supercharged and naturally aspirated Mercury Verado applications from 135HP through current high-horsepower platforms
- SeaPro: commercial-duty Mercury SeaPro outboards used in professional and high-hour applications
Common Mercury Outboard Repair Areas
- Overheating: inspect the water pump, impeller, thermostat, poppet valve, cooling passages, and related cooling components.
- Hard starting or rough running: inspect fuel pumps, filters, injectors or carburetors, spark plugs, coils, sensors, and intake components.
- No spark or intermittent ignition: check ignition coils, stators, switch boxes, trigger assemblies, sensors, grounds, and wiring.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and internal engine components.
- Lower unit noise or water intrusion: inspect seals, bearings, gears, shafts, bearing carriers, and gear lube condition.
- Trim or steering problems: inspect trim motors, pumps, hydraulic components, steering cylinders, hoses, and related rigging parts.
Why Buy Mercury Outboard Parts from Pro Marine USA?
- OEM Mercury and aftermarket replacement options for many common applications.
- Parts for maintenance, repair, engine rebuilding, lower units, electrical systems, fuel systems, steering, trim, and rigging.
- OEM diagram and part-number lookup tools to help identify the correct part before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large inventory of Mercury service parts and hard-to-find marine engine components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Mercury outboard part?
Use the engine horsepower, model, serial number, and year whenever available. Mercury frequently uses serial-number ranges to identify engine families, so the serial number is often the most reliable way to confirm fitment.
Can I search Mercury parts by OEM part number?
Yes. Enter the Mercury 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 Mercury outboard parts vary by serial number?
Yes. Many Mercury components change by serial-number range even within the same horsepower or model family. Always compare the serial range listed for the part with your engine before ordering.
Do you carry parts for Mercury Optimax and Verado engines?
Yes. Pro Marine carries parts for many Mercury Optimax, Verado, Pro XS, EFI, FourStroke, and SeaPro applications, including maintenance, fuel, electrical, cooling, internal engine, lower unit, steering, and rigging components.
Do you carry both OEM and aftermarket Mercury parts?
Yes. Pro Marine offers genuine Mercury parts along with aftermarket replacement parts for many common Mercury outboard maintenance, repair, and rebuild applications.
What Mercury 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 manufacturer-specific service kit components.
Fitment Tip: Mercury outboard parts often vary by serial-number range. Confirm your engine serial number and OEM part number whenever possible before ordering.
18-9128-9
18-91289
349516
769100
MPI Type B Marine Fuel Hose
MPI 3/8" Marine Fuel Hose - Type B - Sold by the Foot
The MPI 375 3/8" Fuel Hose is bulk marine fuel line designed for applications using 3/8" inside-diameter hose. It is sold by the foot so you can purchase the continuous length needed for your boat or outboard fuel-system installation.
This is the Type B version, commonly used in exposed and above-deck marine fuel-line applications where Type B hose is appropriate.
Pro Marine also stocks the matching Oetiker 4-185 ear clamp, Pro Marine 8005 3/8" primer bulb, Oetiker installation tools and a 3/8" Type A alternative.
Inside Diameter: 3/8"
Manufacturer: MPI Products
Fuel Hose Type: Type B Marine Fuel Hose
Sold: By the Foot
Recommended Clamp: Oetiker 4-185
Recommended Primer Bulb: Pro Marine 8005 - 3/8"
How to Order Bulk Fuel Hose
This hose is sold by the foot. Enter the quantity based on the total continuous length required for your installation.
For example, if you need 8 feet of fuel hose, order a quantity of 8.
Type B Marine Fuel Hose
Type B marine fuel hose is commonly used in exposed or above-deck fuel-system applications where that hose classification is appropriate.
Type B hose does not carry the same additional fire-test classification associated with Type A marine fuel hose. If the installation requires Type A hose, use the 3/8" Type A option linked below.
For installations requiring the additional Type A fire-resistant classification, use the 3/8" Type A marine fuel hose.
View 3/8" Type A Marine Fuel Hose
Complete Your 3/8" Fuel Line Setup
Pro Marine stocks the correct clamp, primer bulb and installation tools needed to build or service a 3/8" marine fuel-line assembly.
Oetiker 4-185 Ear Clamp - 10 Pack
Matching Oetiker ear clamp for this 3/8" Type B hose. This same clamp is also used with the 3/8" Type A hose listed below.
Clamp: 4-185
View Oetiker 4-185 Clamp
Pro Marine 8005 - 3/8" Primer Bulb
Matching 3/8" primer bulb for building or repairing marine outboard fuel-line assemblies using 3/8" fuel hose.
Hose Size: 3/8"
View 3/8" Primer Bulb
Oetiker Standard Jaw Pincer Tool
Installation tool for properly closing Oetiker ear clamps on marine fuel-line connections.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
Complete assortment of commonly used Oetiker clamp sizes with the installation tool included. A convenient setup for marine shops, technicians and customers servicing multiple hose sizes.
View Oetiker Clamp Pack3/8" Type A Alternative
3/8" Type A Marine Fuel Hose - 375-1
Use the Type A version when the installation requires the additional Type A fire-resistant marine fuel-hose classification.
Inside Diameter: 3/8"
Fuel Hose Type: Type A
Matching Clamp: Oetiker 4-185
Primer Bulb: Pro Marine 8005 - 3/8"
3/8" Type A vs. Type B Fuel Hose
| Fuel Hose | Classification | Matching Clamp | Primer Bulb |
|---|---|---|---|
| 375 | Type B | Oetiker 4-185 | Pro Marine 8005 - 3/8" |
| 375-1 | Type A | Oetiker 4-185 | Pro Marine 8005 - 3/8" |
Same Clamp for Both 3/8" Fuel Hoses
Unlike some of the smaller fuel-hose sizes, both of these 3/8" fuel-line options use the same Oetiker 4-185 clamp.
That means the clamp selection stays the same whether you choose the Type A or Type B 3/8" hose. The main decision between the two hoses is the required marine fuel-hose classification for the installation.
What This Fuel Hose is Used For
The 375 3/8" Type B fuel hose is used for building, repairing or replacing marine fuel lines where 3/8" hose and Type B construction are appropriate.
Bulk hose sold by the foot makes it possible to build the required length and pair it with the correct primer bulb, fittings and clamps for the specific boat and engine installation.
Building a 3/8" Outboard Fuel Line
Depending on the application, a complete 3/8" fuel-line setup may include:
- 3/8" Type B marine fuel hose
- Pro Marine 8005 3/8" primer bulb
- Correct tank-side fitting or connector
- Correct engine-side fitting or connector
- Oetiker 4-185 ear clamps
- Oetiker pincer installation tool
Primer Bulb Selection
Primer bulb fittings should match the inside diameter of the fuel hose. For 3/8" fuel line, use the Pro Marine 8005 3/8" Primer Bulb.
View Pro Marine 8005 3/8" Primer Bulb
Key Features & Benefits
- 3/8" inside diameter
- Marine Type B fuel hose
- Commonly used for exposed and above-deck installations where Type B hose is appropriate
- Sold by the foot for custom-length installations
- Uses Oetiker 4-185 ear clamp
- Matching Pro Marine 8005 3/8" primer bulb available
- 3/8" Type A alternative available
- Type A and Type B hoses both use the same 4-185 clamp
- Oetiker pincer installation tool available
- Complete Oetiker clamp assortment with tool available
Need Help Choosing the Right Marine Fuel Hose?
Fuel-hose diameter is only one part of choosing the correct line. Installation location, Type A or Type B classification, primer bulb size, fittings and clamp selection should all be considered.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is this fuel hose?
This hose has a 3/8" inside diameter.
Is this fuel hose sold by the foot?
Yes. Order the quantity corresponding to the total number of feet needed.
What type of marine fuel hose is this?
This is Type B marine fuel hose.
Which clamp fits this 3/8" Type B hose?
Use the
Oetiker 4-185 ear clamp
.
Which primer bulb fits this hose?
Use the
Pro Marine 8005 3/8" Primer Bulb
.
What if I need 3/8" Type A fuel hose?
Use the
375-1 3/8" Type A Marine Fuel Hose
.
Does the 3/8" Type A hose use the same clamp?
Yes. Both the Type A and Type B 3/8" hoses use the
Oetiker 4-185 ear clamp.
Can I use the same primer bulb with the Type A hose?
Yes. Both hoses have a 3/8" inside diameter, so the
Pro Marine 8005 3/8" primer bulb is the matching size
for either hose.
What tool installs the Oetiker clamps?
Use the
Oetiker Standard Jaw Pincer Tool
.
Do you sell a complete clamp assortment?
Yes. The
Oetiker Clamp Pack with Tool
includes commonly used 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
375, MPI 375, 3/8 fuel hose, 3/8 marine fuel hose, 3/8 boat fuel line, 3/8 outboard fuel hose, Type B marine fuel hose, Type B fuel line, marine fuel line by the foot, bulk marine fuel hose, above deck fuel hose, Oetiker 4-185, 4-185 fuel hose clamp, 8005, Pro Marine 8005, 3/8 primer bulb, marine primer bulb, outboard primer bulb, 375-1, 3/8 Type A fuel hose, marine fuel hose, outboard fuel line, boat fuel hose
