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Outboard Motor Parts | OEM & Aftermarket
Shop OEM and aftermarket outboard motor parts for Mercury, Yamaha, Suzuki, Honda, Johnson / Evinrude / E-TEC, Tohatsu / Nissan, and Chrysler / Force engines. Pro Marine USA carries parts for routine maintenance, troubleshooting, repair, and complete marine engine rebuilds.
Browse by outboard manufacturer or engine system, or use our OEM parts lookup to identify the correct part number before ordering. Find cooling, fuel, ignition, electrical, internal engine, lower unit, steering, trim, service kit, gasket, seal, and rebuild parts in one place.
Shop Outboard Parts by Manufacturer
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-TEC Outboard Johnson, Evinrude, E-TEC, and OMC replacement parts 
Mercury Outboard Mercury and Mariner maintenance, repair, and rebuild parts 
Suzuki Outboard Suzuki service, lower unit, fuel, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha maintenance, repair, lower unit, and rebuild parts Find the Correct Outboard Part
Not sure which part fits your engine? Start with the engine manufacturer, horsepower, model number, serial number, and year whenever available.
Our OEM parts lookup lets you view factory parts diagrams and identify the original part number for many popular outboard engines. Once you have the OEM number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Shop Outboard Parts by Engine System
Outboard engines use several interconnected systems. Select your manufacturer above to browse the exact categories available for your engine, including the following common repair and maintenance areas.
Common Outboard Problems and Where to Start
- Engine overheating: inspect the water pump, impeller, thermostat, pressure-control components, cooling passages, and engine anodes.
- Hard starting or rough idle: check fuel delivery, carburetor or injector operation, spark plugs, ignition components, filters, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes or ignition modules, sensors, wiring, grounds, and related electrical components.
- Low compression or poor power: inspect pistons, rings, cylinder condition, head and powerhead gaskets, bearings, and other internal engine components.
- Milky gear lube: inspect prop shaft, driveshaft, shift shaft, bearing carrier, and other lower unit seals for water intrusion.
- Lower unit or gearcase noise: inspect bearings, gears, clutch components, shafts, and gear lube condition before continued operation.
- Trim or steering problems: inspect hydraulic fluid level, seals, hoses, trim motors, pumps, steering cylinders, and mechanical connections.
Why Buy Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for major outboard engine brands.
- Marine engine parts for routine maintenance, professional repair, and complete rebuild projects.
- 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 service kits, engine parts, lower unit components, fuel system parts, electrical parts, steering, and rigging products.
- Same-day weekday shipping available on qualifying in-stock orders placed before the shipping cutoff.
OEM and Aftermarket Outboard Parts
OEM parts are supplied by the original engine manufacturer and are designed for the specific engine application. Aftermarket parts are replacement components produced by independent marine parts manufacturers and may provide additional availability or value for many common repairs.
Pro Marine carries both genuine OEM parts and quality aftermarket replacement parts for many outboard maintenance, repair, and rebuild applications. Always confirm fitment using the engine model, serial number, horsepower, year range, or OEM part number when available.
Frequently Asked Questions
How do I find the correct parts for my outboard motor?
Start by identifying the engine manufacturer, horsepower, model number, serial number, and year. Select the manufacturer above to browse by engine system, or use the OEM parts lookup to locate the original part number from a factory diagram.
Can I search Pro Marine by OEM part number?
Yes. If you already have the OEM part number, enter it 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.
What information should I have before ordering an outboard part?
Have the engine manufacturer, horsepower, model number, serial number, and year whenever possible. An OEM part number from the original component or parts diagram is especially helpful because visually similar parts may fit different engine families.
What is the difference between OEM and aftermarket outboard parts?
OEM parts come from the original engine manufacturer. Aftermarket parts are replacement components manufactured by other marine parts companies for compatible applications. Pro Marine carries both OEM and aftermarket options across many common outboard engine systems.
Are aftermarket outboard motor parts reliable?
Quality aftermarket marine parts are commonly used for maintenance, professional repair, and engine rebuilding. The best option depends on the application, manufacturer, availability, and customer preference.
Do you carry parts for older outboard motors?
Yes. Pro Marine carries parts for many older Mercury, Mariner, Johnson, Evinrude, Chrysler, Force, Yamaha, Honda, Suzuki, Nissan, and Tohatsu outboards. Availability varies by engine family and component.
What outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump impellers, complete water pump kits, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Outboard parts can vary by model, serial range, horsepower, and production year. Confirm the OEM part number or engine identification information whenever possible before ordering.
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888988014
MPI Type B Marine Fuel Hose
MPI 1/4" Marine Fuel Hose - Type B - Sold by the Foot
The MPI 315-014 1/4" Fuel Hose is bulk marine fuel line for applications using 1/4" inside-diameter hose. It is sold by the foot so boat owners and marine technicians can build the exact fuel-line length required for the installation.
This is the Type B version, commonly used in exposed and above-deck marine fuel-line applications where Type B hose is permitted.
Pro Marine also stocks the matching Oetiker 4-133 clamp, Pro Marine 8002 1/4" primer bulb, Oetiker installation tools and a 1/4" Type A fuel hose option.
Inside Diameter: 1/4"
Manufacturer: MPI Products
Fuel Hose Type: Type B Marine Fuel Hose
Sold: By the Foot
Recommended Clamp: Oetiker 4-133
Recommended Primer Bulb: Pro Marine 8002 - 1/4"
How to Order Bulk Fuel Hose
This fuel hose is sold by the foot. Enter the quantity based on the continuous hose length required for your installation.
For example, if your fuel-line run requires 6 feet of hose, order a quantity of 6.
Type B Marine Fuel Hose
Marine fuel hose classifications identify how the hose is intended to be used within a boat's fuel system.
Type B fuel hose is commonly used for exposed or above-deck applications where that hose classification is appropriate. It does not carry the same additional fire-test classification as Type A marine fuel hose.
If your fuel line passes through an enclosed area or the installation specifically requires Type A hose, use the Type A option linked below.
For installations requiring the additional Type A fire-resistant classification, use the MPI 314-1 1/4" Type A fuel hose.
View 1/4" Type A Marine Fuel Hose
Complete Your 1/4" Fuel Line Setup
Build a complete 1/4" outboard fuel-line setup with the matching clamp, primer bulb and installation tools shown below.
Oetiker 4-133 Ear Clamp - 10 Pack
Matching Oetiker ear clamp for the MPI 315-014 1/4" Type B fuel hose.
Clamp Size: 4-133
View Oetiker 4-133 Clamp
Pro Marine 8002 - 1/4" Primer Bulb
Matching 1/4" primer bulb for building or repairing marine outboard fuel-line assemblies using 1/4" hose.
Hose Size: 1/4"
View 1/4" 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 common Oetiker clamp sizes with the installation tool included. A convenient option for technicians and marine shops servicing multiple hose sizes.
View Oetiker Clamp Pack1/4" Type A Alternative
MPI 1/4" Type A Marine Fuel Hose - 314-1
Use the Type A version when the installation requires the additional Type A fire-resistant marine fuel-hose classification.
Inside Diameter: 1/4"
Fuel Hose Type: Type A
Matching Clamp: Oetiker 4-170
1/4" Fuel Hose Comparison
| Fuel Hose | Classification | Matching Clamp | Primer Bulb |
|---|---|---|---|
| MPI 315-014 | Type B | Oetiker 4-133 | Pro Marine 8002 - 1/4" |
| MPI 314-1 | Type A | Oetiker 4-170 | Pro Marine 8002 - 1/4" |
Why Do Two 1/4" Hoses Use Different Clamps?
The 1/4" measurement refers to the hose's inside diameter. It does not determine the outside diameter of the hose.
Type A and Type B hose use different constructions and wall thicknesses, so their outside diameters can be different even when both have a 1/4" inside diameter.
That is why the MPI 315-014 Type B hose uses Oetiker 4-133, while the MPI 314-1 Type A hose uses Oetiker 4-170.
What This Fuel Hose is Used For
MPI 315-014 1/4" Type B fuel hose can be used for building, replacing or repairing marine fuel lines where 1/4" hose and a Type B classification are appropriate.
Because this hose is sold in bulk by the foot, it can be paired with the correct primer bulb, fittings and clamps to create a custom-length fuel-line assembly.
Building a 1/4" Outboard Fuel Line
A typical 1/4" outboard fuel-line assembly may require:
- MPI 315-014 1/4" Type B marine fuel hose
- Pro Marine 8002 1/4" primer bulb
- Correct tank-side fitting or connection
- Correct engine-side fitting or connector
- Oetiker 4-133 ear clamps
- Oetiker pincer installation tool
The exact components required depend on the engine, fuel tank and overall fuel-system layout.
Primer Bulb Selection
Primer bulb fittings should match the inside diameter of the fuel hose. For this 1/4" hose, use the Pro Marine 8002 1/4" Primer Bulb.
View Pro Marine 8002 1/4" Primer Bulb
Key Features & Benefits
- 1/4" inside diameter
- MPI Products marine fuel hose
- Type B marine fuel-hose construction
- Commonly used in exposed and above-deck applications where Type B hose is permitted
- Sold by the foot for custom-length installations
- Matching Oetiker 4-133 clamp available
- Matching Pro Marine 8002 1/4" primer bulb available
- Type A 1/4" alternative available
- Oetiker installation tool available
- Complete Oetiker clamp assortment with tool available
Need Help Choosing the Right Marine Fuel Hose?
Choosing the correct marine fuel line depends on hose diameter, installation location, fuel-hose classification, fittings, primer bulb size and clamp size.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is MPI 315-014?
It has a 1/4" inside diameter.
Is this hose sold by the foot?
Yes. Order the quantity corresponding to the total number of feet required.
What type of marine fuel hose is this?
This is MPI Type B marine fuel hose.
Where is Type B fuel hose commonly used?
Type B hose is commonly used for exposed and above-deck fuel-line
applications where that classification is permitted.
Which clamp fits MPI 315-014?
Use the
Oetiker 4-133 ear clamp
.
Which primer bulb fits this 1/4" hose?
Use the
Pro Marine 8002 1/4" Primer Bulb
.
Can I use the same primer bulb with the 1/4" Type A hose?
Yes. Both the 1/4" Type A and Type B hoses use a 1/4" inside diameter, so
the Pro Marine 8002 1/4" primer bulb is the matching hose size.
What if I need Type A 1/4" fuel hose?
Use the
MPI 314-1 1/4" Type A fuel hose
.
Which clamp fits the 1/4" Type A hose?
The Type A MPI 314-1 hose uses the
Oetiker 4-170 ear clamp
.
Why do the Type A and Type B 1/4" hoses use different clamps?
The 1/4" measurement is the inside diameter. Different hose construction
changes the outside diameter, so the clamp must be matched to the specific hose.
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 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 hose?
Contact Pro Marine
Phone: 941-721-3000
Searchable Part Numbers & Terms
315-014, MPI 315-014, 1/4 fuel hose, 1/4 marine fuel hose, 1/4 boat fuel line, 1/4 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, MPI fuel line, Oetiker 4-133, 4-133 fuel hose clamp, 8002, Pro Marine 8002, 1/4 primer bulb, marine primer bulb, outboard primer bulb, 314-1, 1/4 Type A fuel hose, Oetiker 4-170, marine fuel hose, outboard fuel line, boat fuel hose
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