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Tohatsu & Nissan Outboard Parts
Shop OEM and aftermarket Tohatsu and Nissan outboard parts for maintenance, repair, troubleshooting, and complete engine service projects. Browse marine parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Tohatsu and Nissan outboard engine parts for a wide range of 2-stroke, Four Stroke, EFI, and TLDI applications. Use your engine horsepower, model number, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Tohatsu & Nissan Outboard Parts by System
- Control Cables & Boxes
- Cooling System
- Electrical System
- Engine Oil
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service Manuals
- Steering Systems
- Transom & Midsection
- Trim System
Find the Correct Tohatsu or Nissan Outboard Part
Tohatsu and Nissan outboard parts can vary by horsepower, model number, engine family, and production range. If you are unsure which component fits your engine, use the OEM parts lookup to identify the original part number from a factory parts diagram.
Once you have the OEM part number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Tohatsu & Nissan Outboard Engine Families
Pro Marine supports many Tohatsu and Nissan outboards across a wide horsepower range. Always confirm the exact engine model and serial information before ordering parts.
- Portable and Small Outboards: common 2.5HP through 30HP 2-stroke and Four Stroke applications
- Midrange: 35HP through 70HP applications across multiple engine families
- Three-Cylinder Platforms: common 75HP through 90HP applications
- High-Horsepower: 115HP through 140HP applications
- EFI: electronically fuel-injected Tohatsu platforms
- TLDI: Tohatsu direct-injection 2-stroke engine families
Common Tohatsu & Nissan 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, carburetors or injectors, filters, spark plugs, ignition components, and intake sealing.
- No spark or electrical problems: inspect ignition coils, stators, CDI components, rectifiers, sensors, wiring, and grounds.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and other 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 Tohatsu & Nissan Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for many Tohatsu and Nissan outboard 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 cooling, fuel, electrical, lower unit, and service components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Tohatsu or Nissan outboard part?
Start with the engine horsepower, model number, serial number, and production information whenever available. Use the OEM parts lookup to identify the original part number from a factory diagram.
Can I search Tohatsu and Nissan parts by OEM part number?
Yes. Enter the 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 Tohatsu and Nissan outboard parts interchange?
Some Tohatsu and Nissan outboard applications share related engine platforms and components, but fitment should never be assumed. Confirm the model, production range, and OEM part number before ordering.
Do you carry parts for Tohatsu TLDI engines?
Yes. Pro Marine carries parts for many Tohatsu TLDI applications, including cooling, fuel, electrical, internal engine, lower unit, steering, and trim components.
Do you carry parts for older Nissan outboards?
Yes. Pro Marine carries replacement parts for many older Nissan outboard applications. Availability varies by engine family and component.
What Tohatsu and Nissan parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters where applicable, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and model-specific service components.
Fitment Tip: Tohatsu and Nissan outboard parts can vary by model, horsepower, engine family, and production range. Confirm the OEM part number or complete engine identification information whenever possible before ordering.
0173312
0777351
173312
18-8074
39729334059
777351
9-38018
MPI Type A Marine Fuel Hose
MPI 1/4" Type A Marine Fuel Hose - Sold by the Foot
The MPI 314-1 1/4" Type A Marine Fuel Hose is bulk marine fuel line for applications requiring 1/4" inside-diameter hose and the additional fire-resistant protection of Type A marine fuel hose.
Type A hose is commonly selected for enclosed, below-deck and other marine fuel-system installations where Type A hose is required. The hose is sold by the foot, allowing you to order the continuous length needed for your installation.
Pro Marine also stocks the matching Oetiker 4-170 ear clamp, Pro Marine 8002 1/4" primer bulb, Oetiker installation tools and a 1/4" Type B alternative.
Inside Diameter: 1/4"
Manufacturer: MPI Products
Fuel Hose Type: Type A Marine Fuel Hose
Sold: By the Foot
Recommended Clamp: Oetiker 4-170
Recommended Primer Bulb: Pro Marine 8002 - 1/4"
How to Order Bulk Fuel Hose
MPI 314-1 is sold by the foot. Enter the quantity based on the continuous length of fuel hose needed for the installation.
For example, if you need 8 feet of 1/4" Type A hose, order a quantity of 8.
What is Type A Marine Fuel Hose?
Marine fuel hose classifications help identify the hose's intended application, permeation performance and fire resistance.
Type A marine fuel hose meets the applicable marine fuel-hose performance requirements as well as the additional USCG fire-test requirement associated with Type A hose.
This makes Type A hose the appropriate choice for fuel-system installations where the additional fire-resistant classification is required.
Where is Type A Fuel Hose Used?
Type A fuel hose is commonly used in enclosed and below-deck marine fuel-system installations and other locations where the fuel line must meet the Type A fire-resistant classification.
Always select marine fuel hose according to the requirements of the specific fuel-system installation rather than choosing hose based on diameter alone.
For exposed and above-deck applications where Type B marine fuel hose is permitted, Pro Marine stocks the MPI 315-014 1/4" Type B fuel hose.
View MPI 315-014 1/4" Type B Fuel Hose
Complete Your 1/4" Fuel Line Setup
Pro Marine stocks the matching clamp, primer bulb and installation tools needed to build or service a 1/4" marine fuel-line system.
Oetiker 4-170 Ear Clamp - 10 Pack
The matching Oetiker ear clamp for the MPI 314-1 1/4" Type A marine fuel hose.
Clamp: 4-170
View Oetiker 4-170 Clamp
Pro Marine 8002 - 1/4" Primer Bulb
Matching 1/4" primer bulb for compatible outboard fuel-line assemblies using 1/4" fuel hose.
Hose Size: 1/4"
View 1/4" Primer Bulb
Oetiker Standard Jaw Pincer Tool
Installation tool for properly closing Oetiker ear clamps when building or repairing marine fuel lines.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
Assortment of common Oetiker clamp sizes with the installation tool included. Ideal for marine shops and technicians servicing multiple fuel-line sizes.
View Oetiker Clamp Pack1/4" Type B Alternative
MPI 315-014 1/4" Type B Marine Fuel Hose
Type B alternative for exposed and above-deck fuel-line installations where Type B hose is appropriate.
Inside Diameter: 1/4"
Fuel Hose Type: Type B
Matching Clamp: Oetiker 4-133
Primer Bulb: Pro Marine 8002 - 1/4"
1/4" Type A vs. Type B Fuel Hose
| Fuel Hose | Classification | Matching Clamp | Primer Bulb |
|---|---|---|---|
| MPI 314-1 | Type A | Oetiker 4-170 | Pro Marine 8002 - 1/4" |
| MPI 315-014 | Type B | Oetiker 4-133 | Pro Marine 8002 - 1/4" |
Why Do the Type A and Type B Hoses Use Different Clamps?
Both hoses have a 1/4" inside diameter, which allows them to connect to compatible 1/4" fittings and the Pro Marine 8002 1/4" primer bulb.
However, the 1/4" measurement does not indicate the outside diameter of the hose. Different hose constructions and wall thicknesses result in different outside diameters.
The MPI 314-1 Type A hose uses Oetiker 4-170, while the MPI 315-014 Type B hose uses Oetiker 4-133. Always select the clamp for the specific hose rather than selecting it based only on inside diameter.
What This Fuel Hose is Used For
MPI 314-1 is intended for building, repairing or replacing marine fuel lines requiring 1/4" Type A fuel hose.
Selling the hose by the foot makes it suitable for custom-length installations and allows the hose to be paired with the appropriate primer bulb, fittings, connectors and clamps for the specific boat.
Building a 1/4" Type A Fuel Line
Depending on the application, a complete 1/4" fuel-line setup may include:
- MPI 314-1 1/4" Type A marine fuel hose
- Pro Marine 8002 1/4" primer bulb
- Correct tank-side fitting or connection
- Correct engine-side fitting or connector
- Oetiker 4-170 ear clamps
- Oetiker pincer installation tool
Exact component requirements depend on the engine, fuel tank and configuration of the boat's fuel system.
Primer Bulb Selection
Primer bulb fittings should match the inside diameter of the fuel hose. For 1/4" fuel line, 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 A marine fuel-hose construction
- Designed for installations requiring Type A fire resistance
- Common choice for enclosed and below-deck fuel-line routing
- Sold by the foot for custom-length installations
- Matching Oetiker 4-170 clamp available
- Matching Pro Marine 8002 1/4" primer bulb available
- 1/4" Type B alternative available
- Oetiker 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, fittings and the hose's outside diameter for clamp selection should all be considered.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is MPI 314-1?
MPI 314-1 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 MPI 314-1?
MPI 314-1 is Type A marine fuel hose.
Where is Type A marine fuel hose commonly used?
Type A hose is commonly selected for enclosed and below-deck installations
and other applications requiring its additional fire-resistant
classification.
Which clamp fits MPI 314-1?
Use the
Oetiker 4-170 ear clamp
.
Which primer bulb fits this hose?
Use the
Pro Marine 8002 1/4" Primer Bulb
.
Can I use the same primer bulb with Type A and Type B 1/4" hose?
Yes. Both hoses have a 1/4" inside diameter, so the
Pro Marine 8002 1/4" primer bulb is the matching size
for either hose.
Do Type A and Type B 1/4" hoses use the same clamp?
No. MPI 314-1 Type A uses Oetiker 4-170, while MPI
315-014 Type B uses Oetiker 4-133. The hoses have the
same inside diameter but different outside diameters.
What if I need 1/4" Type B fuel hose?
Use the
MPI 315-014 1/4" Type B Marine Fuel Hose
for applications where Type B hose is appropriate.
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 hose?
Contact Pro Marine
Phone: 941-721-3000
Searchable Part Numbers & Terms
314-1, MPI 314-1, 1/4 Type A fuel hose, 1/4 marine fuel hose, 1/4 boat fuel line, Type A marine fuel hose, below deck fuel hose, enclosed marine fuel line, marine fuel line by the foot, bulk marine fuel hose, outboard fuel line, boat fuel hose, Oetiker 4-170, 4-170 fuel hose clamp, 8002, Pro Marine 8002, 1/4 primer bulb, marine primer bulb, outboard primer bulb, 315-014, 1/4 Type B fuel hose, Oetiker 4-133, MPI marine fuel line
Type A Marine Fuel Hose
3/8" Type A Marine Fuel Hose - Sold by the Foot
The 375-1 3/8" Type A Marine Fuel Hose is bulk marine fuel line for applications requiring 3/8" inside-diameter hose and the additional fire-resistant protection associated with Type A marine fuel hose.
Type A hose is commonly selected for enclosed, below-deck and other marine fuel-system installations where Type A hose is required. The hose is sold by the foot so you can purchase the continuous length needed for your installation.
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 B alternative.
Inside Diameter: 3/8"
Fuel Hose Type: Type A 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 continuous hose length required for your installation.
For example, if your fuel-system layout requires 10 feet of hose, order a quantity of 10.
What is Type A Marine Fuel Hose?
Type A marine fuel hose is designed for installations requiring the additional fire-resistant protection associated with the Type A classification.
It is commonly used in enclosed and below-deck fuel-system routing and in other locations where Type A hose is specified by the boat builder, engine manufacturer or applicable installation requirements.
Fuel hose should always be selected based on both hose diameter and installation type.
For exposed and above-deck applications where Type B marine fuel hose is appropriate, use the 375 3/8" Type B fuel hose.
View 3/8" Type B Marine Fuel Hose
Complete Your 3/8" Fuel Line Setup
Pro Marine stocks the matching clamp, primer bulb and Oetiker 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 A marine fuel hose.
Clamp: 4-185
View Oetiker 4-185 Clamp
Pro Marine 8005 - 3/8" Primer Bulb
Matching 3/8" primer bulb for compatible outboard fuel-line assemblies using 3/8" 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
Assortment of commonly used Oetiker clamp sizes with the installation tool included. A convenient option for marine shops and technicians servicing multiple fuel-line sizes.
View Oetiker Clamp Pack3/8" Type B Alternative
3/8" Type B Marine Fuel Hose - 375
Type B alternative for exposed and above-deck fuel-line installations where Type B hose is appropriate.
Inside Diameter: 3/8"
Fuel Hose Type: Type B
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 |
|---|---|---|---|
| 375-1 | Type A | Oetiker 4-185 | Pro Marine 8005 - 3/8" |
| 375 | Type B | Oetiker 4-185 | Pro Marine 8005 - 3/8" |
Same Clamp for Both 3/8" Fuel Hoses
Both the 375-1 Type A and 375 Type B 3/8" fuel hoses use the same Oetiker 4-185 ear clamp.
That makes clamp selection simple when changing between these two 3/8" hose types. The main consideration is the required fuel-hose classification for the installation.
What This Fuel Hose is Used For
The 375-1 3/8" Type A fuel hose is intended for building, repairing or replacing marine fuel lines requiring 3/8" Type A hose.
Selling the hose by the foot makes it suitable for custom-length installations and allows it to be paired with the appropriate primer bulb, fittings, connectors and clamps.
Building a 3/8" Type A Fuel Line
Depending on the application, a complete setup may include:
- 375-1 3/8" Type A 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
- Type A marine fuel-hose construction
- Designed for installations requiring Type A fire-resistant protection
- Commonly used in enclosed and below-deck marine fuel systems
- 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 B alternative available
- Type A and Type B 3/8" hoses 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 the 375-1 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 number of feet needed.
What type of marine fuel hose is 375-1?
The 375-1 is Type A marine fuel hose.
Where is Type A fuel hose commonly used?
Type A hose is commonly selected for enclosed and below-deck installations
and other fuel-system applications requiring its additional fire-resistant
classification.
Which clamp fits this 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 B fuel hose?
Use the
375 3/8" Type B Marine Fuel Hose
.
Does the Type B hose use the same clamp?
Yes. Both 3/8" Type A and Type B hoses use the
Oetiker 4-185 ear clamp.
Can I use the same primer bulb on Type A and Type B hose?
Yes. Both hoses use a 3/8" inside diameter, so the
Pro Marine 8005 3/8" primer bulb matches both.
What tool installs the Oetiker clamp?
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
375-1, 3/8 Type A fuel hose, 3/8 marine fuel hose, 3/8 boat fuel line, below deck fuel hose, enclosed marine fuel line, Type A marine fuel hose, marine fuel line by the foot, bulk marine fuel hose, outboard fuel line, boat 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, 3/8 Type B fuel hose, marine fuel system, boat fuel line
MPI Type A Low-Permeation Marine Fuel Hose
MPI 5/16" Type A Marine Fuel Hose - Sold by the Foot
The MPI 313-1 5/16" Type A Marine Fuel Hose is a low-permeation bulk fuel line for marine installations requiring the additional fire-resistant protection associated with USCG Type A fuel hose.
This hose is a strong choice for enclosed, below-deck and other installations where Type A hose is required. It is sold by the foot so you can purchase the exact length needed for the boat.
Pro Marine also stocks the correct Oetiker 4-170 ear clamp, a compatible 5/16" primer bulb, clamp installation tools and alternate 5/16" fuel-hose options.
Inside Diameter: 5/16"
Manufacturer: MPI Products
Fuel Hose Type: Type A Marine Fuel Hose
Construction: Low Permeation
Sold: By the Foot
Recommended Clamp: Oetiker 4-170
Recommended Primer Bulb: Pro Marine 8004 - 5/16"
How to Order Bulk Fuel Hose
This hose is sold by the foot. Enter the quantity based on the total continuous length needed for your installation.
For example, if you need 10 feet of hose, order a quantity of 10.
What Does Type A Marine Fuel Hose Mean?
Marine fuel hose is classified according to its intended fuel-system use, permeation performance and fire-resistance requirements.
Type A hose meets the applicable marine fuel-hose performance standard and also meets the additional USCG fire-test requirement. This makes Type A hose the appropriate choice in marine installations where additional fire resistance is required.
Type A1 vs. Type A2
| Classification | General Application | Permeation Class |
|---|---|---|
| Type A1 | Fuel-feed hose, including tank-to-engine applications where Type A hose is required | Lower permeation |
| Type A2 | Certain fuel-fill and vent applications | Higher permitted permeation than Class 1 |
For marine fuel-feed hose between the fuel tank and engine, federal requirements specifically identify USCG Type A1 as the Type A fuel-feed classification.
Always confirm the exact hose marking and requirements for your particular fuel-system installation before ordering.
When Should You Choose Type A Fuel Hose?
Type A fuel hose is generally selected when the fuel line is routed through an area where the installation requires the additional USCG fire-resistant hose classification.
This commonly includes many enclosed or below-deck installations, as well as other fuel-system layouts where Type A hose is specified by the boat builder, engine manufacturer or applicable regulation.
Complete Your 5/16" Fuel Line Setup
Oetiker 4-170 Ear Clamp - 10 Pack
Matching Oetiker ear clamp for the MPI 313-1 5/16" Type A marine fuel hose.
View Oetiker 4-170 Clamp
Pro Marine 8004 - 5/16" Primer Bulb
5/16" primer bulb for compatible outboard fuel-line assemblies using 5/16" fuel hose.
View 5/16" Primer Bulb
Oetiker Standard Jaw Pincer Tool
Pincer tool for properly closing Oetiker ear clamps during marine fuel-line installation.
View Oetiker Pincer Tool
Oetiker Clamp Pack with Tool
Complete assortment of commonly used marine Oetiker clamp sizes with the installation tool included.
View Oetiker Clamp PackOther 5/16" Fuel Hose Options
MPI 5/16" Type B1/B2 Fuel Hose - 315-056
Type B alternative for exposed and above-deck installations where Type B hose is permitted.
Matching Clamp: Oetiker 4-153
View 5/16" Type B Fuel Hose
Mercury OEM 5/16" Silver Fuel Hose
Genuine Mercury Marine 5/16" bulk fuel hose for compatible Mercury outboard fuel-line applications.
Matching Clamp: Oetiker 4-145
View Mercury OEM Fuel Hose5/16" Fuel Hose Comparison
| Fuel Hose | Type | Recommended Clamp |
|---|---|---|
| MPI 313-1 | Type A Low-Permeation | Oetiker 4-170 |
| MPI 315-056 | Type B1/B2 | Oetiker 4-153 |
| Mercury OEM #100 | Mercury Silver Fuel Hose | Oetiker 4-145 |
Why Do Different 5/16" Hoses Use Different Clamps?
The 5/16" measurement describes the hose's inside diameter. It does not tell you the outside diameter.
Type A hose typically has a different construction and wall thickness than Type B or OEM hose, so its outside diameter can be larger even though all of the hoses have the same 5/16" inside diameter.
That is why the MPI 313-1 Type A hose uses the Oetiker 4-170 clamp, while the Type B hose uses 4-153 and the Mercury silver hose uses 4-145.
What This Fuel Hose is Used For
The MPI 313-1 Type A fuel hose is intended for building, repairing or replacing compatible marine fuel lines where a Type A fuel-hose classification is required.
Typical installations may include permanent marine fuel systems, enclosed routing areas and tank-to-engine applications requiring Type A1 fuel-feed hose.
Building a 5/16" Type A Fuel Line
Depending on the installation, a complete setup may require:
- MPI 313-1 5/16" Type A fuel hose
- Oetiker 4-170 ear clamps
- 5/16" primer bulb
- Correct tank-side fitting
- Correct engine-side fitting or connector
- Oetiker pincer installation tool
Key Features & Benefits
- 5/16" inside diameter
- MPI Products marine fuel hose
- Type A marine fuel-hose construction
- Low-permeation design
- Suitable for applications requiring Type A fire resistance
- Common choice for enclosed and below-deck installations
- Sold by the foot
- Matching Oetiker 4-170 clamp available
- Compatible 5/16" primer bulb available
- Type B and Mercury OEM 5/16" alternatives available
Need Help Choosing the Right Marine Fuel Hose?
Selecting the correct fuel hose depends on more than hose diameter. Installation location, fuel-hose classification, permeation rating, fittings, primer bulb and clamp size all matter.
Visit the Pro Marine Fuel Line Technical Center
FAQ
What size is MPI 313-1?
It has a 5/16" inside diameter.
Is this fuel hose sold by the foot?
Yes. Order the number of feet required for your installation.
What is Type A marine fuel hose?
Type A hose meets the applicable marine fuel-hose performance standard
and the additional USCG fire-test requirement.
Can Type A hose be used below deck?
Type A hose is commonly selected for enclosed and below-deck installations
where the additional fire-resistant classification is required.
What is the difference between Type A1 and A2?
Type A1 is the lower-permeation Type A classification typically used for
fuel-feed applications. Type A2 permits greater permeation and is used
for certain fill and vent applications.
Which clamp fits this hose?
Use the Oetiker 4-170 ear clamp with MPI 313-1.
Which primer bulb fits this hose?
The
Pro Marine 8004 5/16" Primer Bulb
matches the hose size.
What if I need an above-deck Type B fuel hose?
Pro Marine stocks the
MPI 315-056 5/16" Type B1/B2 fuel hose
.
Do you stock Mercury OEM 5/16" fuel hose?
Yes. The
Mercury OEM 5/16" silver fuel hose
is also available by the foot.
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 Terms
313-1, MPI 313-1, 5/16 Type A fuel hose, 5/16 marine fuel hose, Type A1 fuel hose, Type A2 fuel hose, low permeation fuel hose, below deck fuel hose, enclosed marine fuel hose, marine fuel line by the foot, bulk marine fuel hose, tank to engine fuel hose, outboard fuel line, boat fuel hose, Oetiker 4-170, 4-170 fuel hose clamp, 5/16 primer bulb, marine primer bulb, Type A marine fuel line, USCG fuel hose
54-13791
8M0214911
888988015
888441